./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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-38b53e6 [2022-11-25 16:50:48,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:50:48,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:50:48,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:50:48,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:50:48,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:50:48,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:50:48,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:50:48,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:50:48,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:50:48,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:50:48,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:50:48,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:50:48,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:50:48,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:50:48,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:50:48,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:50:48,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:50:48,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:50:48,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:50:48,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:50:48,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:50:48,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:50:48,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:50:48,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:50:48,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:50:48,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:50:48,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:50:48,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:50:48,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:50:48,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:50:48,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:50:48,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:50:48,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:50:48,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:50:48,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:50:48,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:50:48,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:50:48,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:50:48,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:50:48,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:50:48,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:50:48,832 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:50:48,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:50:48,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:50:48,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:50:48,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:50:48,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:50:48,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:50:48,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:50:48,840 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:50:48,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:50:48,842 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:50:48,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:50:48,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:50:48,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:50:48,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:50:48,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:50:48,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:50:48,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:50:48,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:50:48,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:50:48,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:50:48,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:50:48,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:50:48,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:50:48,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:50:48,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:50:48,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:50:48,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:50:48,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:50:48,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:50:48,847 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:50:48,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:50:48,848 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:50:48,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:50:48,849 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_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-25 16:50:49,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:50:49,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:50:49,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:50:49,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:50:49,210 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:50:49,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-25 16:50:52,333 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:50:52,552 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:50:52,553 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-25 16:50:52,566 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/data/ff5b6a3dc/e6e79f266a3b495eb041ead469a5e17d/FLAG6f5e2e893 [2022-11-25 16:50:52,582 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/data/ff5b6a3dc/e6e79f266a3b495eb041ead469a5e17d [2022-11-25 16:50:52,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:50:52,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:50:52,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:50:52,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:50:52,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:50:52,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:52,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1c31f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52, skipping insertion in model container [2022-11-25 16:50:52,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:52,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:50:52,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:50:52,870 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_716d50d3-53f4-40a0-96e4-91b4da06a7cf/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-25 16:50:52,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:50:52,893 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:50:52,923 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_716d50d3-53f4-40a0-96e4-91b4da06a7cf/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-25 16:50:52,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:50:52,943 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:50:52,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52 WrapperNode [2022-11-25 16:50:52,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:50:52,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:50:52,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:50:52,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:50:52,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:52,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,019 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-11-25 16:50:53,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:50:53,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:50:53,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:50:53,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:50:53,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,075 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:50:53,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:50:53,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:50:53,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:50:53,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (1/1) ... [2022-11-25 16:50:53,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:50:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:53,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:50:53,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:50:53,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:50:53,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 16:50:53,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 16:50:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 16:50:53,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 16:50:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:50:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:50:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:50:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:50:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:50:53,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:50:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:50:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:50:53,190 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:50:53,303 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:50:53,306 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:50:54,008 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:50:54,019 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:50:54,022 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 16:50:54,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:50:54 BoogieIcfgContainer [2022-11-25 16:50:54,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:50:54,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:50:54,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:50:54,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:50:54,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:50:52" (1/3) ... [2022-11-25 16:50:54,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0ebb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:50:54, skipping insertion in model container [2022-11-25 16:50:54,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:50:52" (2/3) ... [2022-11-25 16:50:54,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0ebb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:50:54, skipping insertion in model container [2022-11-25 16:50:54,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:50:54" (3/3) ... [2022-11-25 16:50:54,037 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-25 16:50:54,048 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 16:50:54,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:50:54,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:50:54,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:50:54,194 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 16:50:54,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 226 transitions, 468 flow [2022-11-25 16:50:54,360 INFO L130 PetriNetUnfolder]: 21/224 cut-off events. [2022-11-25 16:50:54,361 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:50:54,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 21/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 227 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2022-11-25 16:50:54,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 226 transitions, 468 flow [2022-11-25 16:50:54,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 442 flow [2022-11-25 16:50:54,382 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:50:54,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 215 transitions, 442 flow [2022-11-25 16:50:54,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 215 transitions, 442 flow [2022-11-25 16:50:54,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 442 flow [2022-11-25 16:50:54,476 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2022-11-25 16:50:54,477 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:50:54,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 225 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2022-11-25 16:50:54,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2022-11-25 16:51:03,521 INFO L134 LiptonReduction]: Checked pairs total: 3003 [2022-11-25 16:51:03,522 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-25 16:51:03,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:51:03,550 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;@4d4d380e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:51:03,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 16:51:03,560 INFO L130 PetriNetUnfolder]: 7/24 cut-off events. [2022-11-25 16:51:03,560 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:51:03,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:03,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:03,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1908727226, now seen corresponding path program 1 times [2022-11-25 16:51:03,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:03,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581070809] [2022-11-25 16:51:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:04,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581070809] [2022-11-25 16:51:04,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581070809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:04,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:04,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:51:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801912479] [2022-11-25 16:51:04,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:04,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:51:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:51:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:51:04,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 458 [2022-11-25 16:51:04,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:04,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:04,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 458 [2022-11-25 16:51:04,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:04,865 INFO L130 PetriNetUnfolder]: 112/192 cut-off events. [2022-11-25 16:51:04,865 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 16:51:04,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 192 events. 112/192 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 551 event pairs, 51 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 338. Up to 151 conditions per place. [2022-11-25 16:51:04,872 INFO L137 encePairwiseOnDemand]: 454/458 looper letters, 35 selfloop transitions, 1 changer transitions 5/41 dead transitions. [2022-11-25 16:51:04,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 188 flow [2022-11-25 16:51:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:51:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:51:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 827 transitions. [2022-11-25 16:51:04,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45141921397379914 [2022-11-25 16:51:04,905 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 827 transitions. [2022-11-25 16:51:04,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 827 transitions. [2022-11-25 16:51:04,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:04,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 827 transitions. [2022-11-25 16:51:04,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:04,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:04,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:04,932 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 827 transitions. [2022-11-25 16:51:04,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 188 flow [2022-11-25 16:51:04,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 16:51:04,938 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2022-11-25 16:51:04,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-11-25 16:51:04,944 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2022-11-25 16:51:04,945 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2022-11-25 16:51:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:04,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:04,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:04,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:51:04,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash 157651470, now seen corresponding path program 2 times [2022-11-25 16:51:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259404515] [2022-11-25 16:51:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259404515] [2022-11-25 16:51:05,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259404515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:05,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:05,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:51:05,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089082902] [2022-11-25 16:51:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:05,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:51:05,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:51:05,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:51:05,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 458 [2022-11-25 16:51:05,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:05,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 458 [2022-11-25 16:51:05,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:05,590 INFO L130 PetriNetUnfolder]: 119/215 cut-off events. [2022-11-25 16:51:05,590 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-11-25 16:51:05,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 215 events. 119/215 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 679 event pairs, 67 based on Foata normal form. 5/172 useless extension candidates. Maximal degree in co-relation 466. Up to 179 conditions per place. [2022-11-25 16:51:05,596 INFO L137 encePairwiseOnDemand]: 454/458 looper letters, 31 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2022-11-25 16:51:05,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 179 flow [2022-11-25 16:51:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:51:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:51:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 825 transitions. [2022-11-25 16:51:05,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45032751091703055 [2022-11-25 16:51:05,601 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 825 transitions. [2022-11-25 16:51:05,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 825 transitions. [2022-11-25 16:51:05,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:05,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 825 transitions. [2022-11-25 16:51:05,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,611 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,612 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 825 transitions. [2022-11-25 16:51:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 179 flow [2022-11-25 16:51:05,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 16:51:05,616 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2022-11-25 16:51:05,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-11-25 16:51:05,617 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-11-25 16:51:05,617 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2022-11-25 16:51:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:05,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:05,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:51:05,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:05,625 INFO L85 PathProgramCache]: Analyzing trace with hash 432781199, now seen corresponding path program 1 times [2022-11-25 16:51:05,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:05,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527664323] [2022-11-25 16:51:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:05,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:05,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527664323] [2022-11-25 16:51:05,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527664323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:05,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:05,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:51:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056228442] [2022-11-25 16:51:05,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:05,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:51:05,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:51:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:51:05,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 458 [2022-11-25 16:51:05,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:05,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 458 [2022-11-25 16:51:05,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:05,801 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2022-11-25 16:51:05,801 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-11-25 16:51:05,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 154 events. 87/154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 417 event pairs, 24 based on Foata normal form. 16/138 useless extension candidates. Maximal degree in co-relation 348. Up to 133 conditions per place. [2022-11-25 16:51:05,805 INFO L137 encePairwiseOnDemand]: 454/458 looper letters, 26 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2022-11-25 16:51:05,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 153 flow [2022-11-25 16:51:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:51:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:51:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2022-11-25 16:51:05,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4657933042212518 [2022-11-25 16:51:05,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2022-11-25 16:51:05,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2022-11-25 16:51:05,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:05,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2022-11-25 16:51:05,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,815 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 640 transitions. [2022-11-25 16:51:05,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 153 flow [2022-11-25 16:51:05,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 150 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 16:51:05,818 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2022-11-25 16:51:05,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-11-25 16:51:05,819 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-11-25 16:51:05,820 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2022-11-25 16:51:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:05,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:05,821 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:05,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:51:05,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1616086796, now seen corresponding path program 1 times [2022-11-25 16:51:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925357034] [2022-11-25 16:51:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:06,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:06,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925357034] [2022-11-25 16:51:06,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925357034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:06,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:06,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 16:51:06,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461272912] [2022-11-25 16:51:06,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:06,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:51:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:51:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:51:07,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 458 [2022-11-25 16:51:07,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 9 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:07,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:07,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 458 [2022-11-25 16:51:07,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:08,261 INFO L130 PetriNetUnfolder]: 255/432 cut-off events. [2022-11-25 16:51:08,262 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-11-25 16:51:08,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 432 events. 255/432 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1582 event pairs, 37 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 395. Up to 103 conditions per place. [2022-11-25 16:51:08,267 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 89 selfloop transitions, 23 changer transitions 17/129 dead transitions. [2022-11-25 16:51:08,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 129 transitions, 617 flow [2022-11-25 16:51:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:51:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 16:51:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2690 transitions. [2022-11-25 16:51:08,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41952588895820336 [2022-11-25 16:51:08,280 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2690 transitions. [2022-11-25 16:51:08,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2690 transitions. [2022-11-25 16:51:08,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:08,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2690 transitions. [2022-11-25 16:51:08,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 192.14285714285714) internal successors, (2690), 14 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:08,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:08,310 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:08,310 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 14 states and 2690 transitions. [2022-11-25 16:51:08,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 129 transitions, 617 flow [2022-11-25 16:51:08,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 129 transitions, 581 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-25 16:51:08,316 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 212 flow [2022-11-25 16:51:08,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=212, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-11-25 16:51:08,318 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2022-11-25 16:51:08,319 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 212 flow [2022-11-25 16:51:08,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:08,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:08,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:51:08,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1416424958, now seen corresponding path program 2 times [2022-11-25 16:51:08,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:08,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967393493] [2022-11-25 16:51:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:09,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967393493] [2022-11-25 16:51:09,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967393493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:09,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:09,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 16:51:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53889663] [2022-11-25 16:51:09,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:51:09,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:51:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:51:10,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:51:10,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 186.66666666666666) internal successors, (1680), 9 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:10,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:10,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:51:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:11,314 INFO L130 PetriNetUnfolder]: 290/528 cut-off events. [2022-11-25 16:51:11,315 INFO L131 PetriNetUnfolder]: For 473/473 co-relation queries the response was YES. [2022-11-25 16:51:11,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1567 conditions, 528 events. 290/528 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2161 event pairs, 25 based on Foata normal form. 26/525 useless extension candidates. Maximal degree in co-relation 1355. Up to 103 conditions per place. [2022-11-25 16:51:11,320 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 121 selfloop transitions, 33 changer transitions 16/170 dead transitions. [2022-11-25 16:51:11,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 170 transitions, 939 flow [2022-11-25 16:51:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:51:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 16:51:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3872 transitions. [2022-11-25 16:51:11,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.422707423580786 [2022-11-25 16:51:11,333 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3872 transitions. [2022-11-25 16:51:11,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3872 transitions. [2022-11-25 16:51:11,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:11,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3872 transitions. [2022-11-25 16:51:11,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 193.6) internal successors, (3872), 20 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:11,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 458.0) internal successors, (9618), 21 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:11,364 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 458.0) internal successors, (9618), 21 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:11,364 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 212 flow. Second operand 20 states and 3872 transitions. [2022-11-25 16:51:11,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 170 transitions, 939 flow [2022-11-25 16:51:11,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 170 transitions, 883 flow, removed 26 selfloop flow, removed 3 redundant places. [2022-11-25 16:51:11,378 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 354 flow [2022-11-25 16:51:11,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2022-11-25 16:51:11,383 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 42 predicate places. [2022-11-25 16:51:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 354 flow [2022-11-25 16:51:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 186.66666666666666) internal successors, (1680), 9 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:11,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:11,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:11,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:51:11,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1955690108, now seen corresponding path program 3 times [2022-11-25 16:51:11,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:11,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023502398] [2022-11-25 16:51:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:11,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023502398] [2022-11-25 16:51:11,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023502398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:11,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:11,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:51:11,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861230239] [2022-11-25 16:51:11,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:11,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:51:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:51:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:51:12,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:51:12,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 354 flow. Second operand has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:12,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:12,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:51:12,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:13,099 INFO L130 PetriNetUnfolder]: 296/558 cut-off events. [2022-11-25 16:51:13,099 INFO L131 PetriNetUnfolder]: For 1215/1215 co-relation queries the response was YES. [2022-11-25 16:51:13,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 558 events. 296/558 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2386 event pairs, 35 based on Foata normal form. 2/527 useless extension candidates. Maximal degree in co-relation 1943. Up to 99 conditions per place. [2022-11-25 16:51:13,105 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 129 selfloop transitions, 31 changer transitions 14/174 dead transitions. [2022-11-25 16:51:13,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 174 transitions, 1119 flow [2022-11-25 16:51:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:51:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:51:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3502 transitions. [2022-11-25 16:51:13,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42479378942261037 [2022-11-25 16:51:13,117 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3502 transitions. [2022-11-25 16:51:13,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3502 transitions. [2022-11-25 16:51:13,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:13,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3502 transitions. [2022-11-25 16:51:13,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 194.55555555555554) internal successors, (3502), 18 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:13,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:13,146 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:13,146 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 354 flow. Second operand 18 states and 3502 transitions. [2022-11-25 16:51:13,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 174 transitions, 1119 flow [2022-11-25 16:51:13,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 174 transitions, 995 flow, removed 40 selfloop flow, removed 14 redundant places. [2022-11-25 16:51:13,158 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 386 flow [2022-11-25 16:51:13,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=386, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2022-11-25 16:51:13,162 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 47 predicate places. [2022-11-25 16:51:13,162 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 386 flow [2022-11-25 16:51:13,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:13,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:13,164 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:13,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:51:13,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2025923294, now seen corresponding path program 4 times [2022-11-25 16:51:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149151727] [2022-11-25 16:51:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:13,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:13,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:13,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149151727] [2022-11-25 16:51:13,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149151727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:13,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:13,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:51:13,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678321950] [2022-11-25 16:51:13,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:13,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:51:13,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:13,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:51:13,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:51:14,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 458 [2022-11-25 16:51:14,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 386 flow. Second operand has 8 states, 8 states have (on average 182.875) internal successors, (1463), 8 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:14,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:14,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 458 [2022-11-25 16:51:14,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:14,864 INFO L130 PetriNetUnfolder]: 256/518 cut-off events. [2022-11-25 16:51:14,864 INFO L131 PetriNetUnfolder]: For 849/849 co-relation queries the response was YES. [2022-11-25 16:51:14,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 518 events. 256/518 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2343 event pairs, 49 based on Foata normal form. 38/523 useless extension candidates. Maximal degree in co-relation 1727. Up to 207 conditions per place. [2022-11-25 16:51:14,869 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 71 selfloop transitions, 26 changer transitions 12/109 dead transitions. [2022-11-25 16:51:14,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 109 transitions, 776 flow [2022-11-25 16:51:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:51:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:51:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1900 transitions. [2022-11-25 16:51:14,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4148471615720524 [2022-11-25 16:51:14,875 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1900 transitions. [2022-11-25 16:51:14,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1900 transitions. [2022-11-25 16:51:14,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:14,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1900 transitions. [2022-11-25 16:51:14,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:14,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:14,900 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:14,901 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 386 flow. Second operand 10 states and 1900 transitions. [2022-11-25 16:51:14,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 109 transitions, 776 flow [2022-11-25 16:51:14,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 722 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-11-25 16:51:14,908 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 444 flow [2022-11-25 16:51:14,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=444, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2022-11-25 16:51:14,909 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 47 predicate places. [2022-11-25 16:51:14,909 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 444 flow [2022-11-25 16:51:14,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 182.875) internal successors, (1463), 8 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:14,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:14,919 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:14,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:51:14,920 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1937256082, now seen corresponding path program 5 times [2022-11-25 16:51:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:14,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324187725] [2022-11-25 16:51:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:14,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324187725] [2022-11-25 16:51:15,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324187725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:15,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:15,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:51:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089278879] [2022-11-25 16:51:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:51:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:51:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:51:15,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:51:15,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:15,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:15,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:51:15,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:16,683 INFO L130 PetriNetUnfolder]: 256/514 cut-off events. [2022-11-25 16:51:16,684 INFO L131 PetriNetUnfolder]: For 1184/1184 co-relation queries the response was YES. [2022-11-25 16:51:16,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1968 conditions, 514 events. 256/514 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2287 event pairs, 53 based on Foata normal form. 2/479 useless extension candidates. Maximal degree in co-relation 1831. Up to 91 conditions per place. [2022-11-25 16:51:16,690 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 137 selfloop transitions, 33 changer transitions 10/180 dead transitions. [2022-11-25 16:51:16,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 180 transitions, 1162 flow [2022-11-25 16:51:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:51:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 16:51:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3876 transitions. [2022-11-25 16:51:16,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42314410480349346 [2022-11-25 16:51:16,704 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3876 transitions. [2022-11-25 16:51:16,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3876 transitions. [2022-11-25 16:51:16,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:16,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3876 transitions. [2022-11-25 16:51:16,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 193.8) internal successors, (3876), 20 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:16,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 458.0) internal successors, (9618), 21 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:16,731 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 458.0) internal successors, (9618), 21 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:16,731 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 444 flow. Second operand 20 states and 3876 transitions. [2022-11-25 16:51:16,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 180 transitions, 1162 flow [2022-11-25 16:51:16,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1079 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-11-25 16:51:16,748 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 500 flow [2022-11-25 16:51:16,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=500, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2022-11-25 16:51:16,751 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2022-11-25 16:51:16,751 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 500 flow [2022-11-25 16:51:16,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:16,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:16,752 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:16,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:51:16,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash -648881844, now seen corresponding path program 6 times [2022-11-25 16:51:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:16,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936936745] [2022-11-25 16:51:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936936745] [2022-11-25 16:51:17,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936936745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:17,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:17,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:51:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004518509] [2022-11-25 16:51:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:51:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:51:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:51:17,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:51:17,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 500 flow. Second operand has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:17,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:17,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:51:17,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:18,284 INFO L130 PetriNetUnfolder]: 254/500 cut-off events. [2022-11-25 16:51:18,285 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2022-11-25 16:51:18,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 500 events. 254/500 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2181 event pairs, 49 based on Foata normal form. 2/465 useless extension candidates. Maximal degree in co-relation 1808. Up to 87 conditions per place. [2022-11-25 16:51:18,290 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 115 selfloop transitions, 31 changer transitions 10/156 dead transitions. [2022-11-25 16:51:18,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1067 flow [2022-11-25 16:51:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:51:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:51:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3476 transitions. [2022-11-25 16:51:18,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4216399805919457 [2022-11-25 16:51:18,300 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3476 transitions. [2022-11-25 16:51:18,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3476 transitions. [2022-11-25 16:51:18,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:18,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3476 transitions. [2022-11-25 16:51:18,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 193.11111111111111) internal successors, (3476), 18 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,326 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,326 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 500 flow. Second operand 18 states and 3476 transitions. [2022-11-25 16:51:18,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1067 flow [2022-11-25 16:51:18,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 156 transitions, 995 flow, removed 12 selfloop flow, removed 11 redundant places. [2022-11-25 16:51:18,337 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 510 flow [2022-11-25 16:51:18,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=510, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2022-11-25 16:51:18,338 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2022-11-25 16:51:18,338 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 510 flow [2022-11-25 16:51:18,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:18,339 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:18,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:51:18,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1746797164, now seen corresponding path program 1 times [2022-11-25 16:51:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559238927] [2022-11-25 16:51:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:18,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559238927] [2022-11-25 16:51:18,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559238927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113399224] [2022-11-25 16:51:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:18,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:18,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:51:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 16:51:18,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:19,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:19,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:19,594 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 161 treesize of output 125 [2022-11-25 16:51:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:20,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113399224] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:20,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:20,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-11-25 16:51:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632719132] [2022-11-25 16:51:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:51:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:51:20,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:51:21,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:51:21,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 510 flow. Second operand has 10 states, 10 states have (on average 176.6) internal successors, (1766), 10 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:21,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:21,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:51:21,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:22,698 INFO L130 PetriNetUnfolder]: 369/720 cut-off events. [2022-11-25 16:51:22,698 INFO L131 PetriNetUnfolder]: For 1441/1441 co-relation queries the response was YES. [2022-11-25 16:51:22,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 720 events. 369/720 cut-off events. For 1441/1441 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3514 event pairs, 60 based on Foata normal form. 17/688 useless extension candidates. Maximal degree in co-relation 2618. Up to 163 conditions per place. [2022-11-25 16:51:22,707 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 105 selfloop transitions, 42 changer transitions 6/153 dead transitions. [2022-11-25 16:51:22,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1218 flow [2022-11-25 16:51:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:51:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:51:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2394 transitions. [2022-11-25 16:51:22,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40208263352368157 [2022-11-25 16:51:22,713 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2394 transitions. [2022-11-25 16:51:22,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2394 transitions. [2022-11-25 16:51:22,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:22,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2394 transitions. [2022-11-25 16:51:22,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.15384615384616) internal successors, (2394), 13 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:22,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:22,733 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:22,733 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 510 flow. Second operand 13 states and 2394 transitions. [2022-11-25 16:51:22,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1218 flow [2022-11-25 16:51:22,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 153 transitions, 1118 flow, removed 14 selfloop flow, removed 16 redundant places. [2022-11-25 16:51:22,747 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 735 flow [2022-11-25 16:51:22,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=735, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2022-11-25 16:51:22,749 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 69 predicate places. [2022-11-25 16:51:22,750 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 735 flow [2022-11-25 16:51:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.6) internal successors, (1766), 10 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:22,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:22,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:22,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:22,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:51:22,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 811282644, now seen corresponding path program 2 times [2022-11-25 16:51:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180426108] [2022-11-25 16:51:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:23,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180426108] [2022-11-25 16:51:23,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180426108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390257645] [2022-11-25 16:51:23,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:51:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:23,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:23,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:51:23,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:51:23,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 16:51:23,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:23,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:23,829 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 115 treesize of output 80 [2022-11-25 16:51:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:51:23,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:51:23,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390257645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:23,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:51:23,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-11-25 16:51:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322528327] [2022-11-25 16:51:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:23,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:51:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:51:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:51:24,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 458 [2022-11-25 16:51:24,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 735 flow. Second operand has 9 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:24,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:24,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 458 [2022-11-25 16:51:24,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:24,577 INFO L130 PetriNetUnfolder]: 365/706 cut-off events. [2022-11-25 16:51:24,577 INFO L131 PetriNetUnfolder]: For 2395/2395 co-relation queries the response was YES. [2022-11-25 16:51:24,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 706 events. 365/706 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3354 event pairs, 70 based on Foata normal form. 1/659 useless extension candidates. Maximal degree in co-relation 2887. Up to 361 conditions per place. [2022-11-25 16:51:24,585 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 75 selfloop transitions, 32 changer transitions 11/118 dead transitions. [2022-11-25 16:51:24,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 118 transitions, 1145 flow [2022-11-25 16:51:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:51:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:51:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1722 transitions. [2022-11-25 16:51:24,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4177583697234352 [2022-11-25 16:51:24,591 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1722 transitions. [2022-11-25 16:51:24,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1722 transitions. [2022-11-25 16:51:24,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:24,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1722 transitions. [2022-11-25 16:51:24,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.33333333333334) internal successors, (1722), 9 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:24,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:51:24,608 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:51:24,608 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 735 flow. Second operand 9 states and 1722 transitions. [2022-11-25 16:51:24,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 118 transitions, 1145 flow [2022-11-25 16:51:24,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 118 transitions, 1088 flow, removed 28 selfloop flow, removed 2 redundant places. [2022-11-25 16:51:24,642 INFO L231 Difference]: Finished difference. Result has 102 places, 79 transitions, 760 flow [2022-11-25 16:51:24,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=760, PETRI_PLACES=102, PETRI_TRANSITIONS=79} [2022-11-25 16:51:24,643 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 77 predicate places. [2022-11-25 16:51:24,643 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 79 transitions, 760 flow [2022-11-25 16:51:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:24,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:24,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:24,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:24,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:24,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1414287620, now seen corresponding path program 3 times [2022-11-25 16:51:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713354375] [2022-11-25 16:51:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:24,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:25,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713354375] [2022-11-25 16:51:25,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713354375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:25,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707979337] [2022-11-25 16:51:25,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:51:25,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:25,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:25,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:25,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:51:25,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 16:51:25,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 16:51:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:25,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:25,659 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 111 treesize of output 76 [2022-11-25 16:51:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:51:25,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:51:25,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707979337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:25,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:51:25,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-11-25 16:51:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636336155] [2022-11-25 16:51:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:51:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:51:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:51:26,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 458 [2022-11-25 16:51:26,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 79 transitions, 760 flow. Second operand has 9 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:26,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:26,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 458 [2022-11-25 16:51:26,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:26,460 INFO L130 PetriNetUnfolder]: 359/690 cut-off events. [2022-11-25 16:51:26,461 INFO L131 PetriNetUnfolder]: For 2325/2325 co-relation queries the response was YES. [2022-11-25 16:51:26,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 690 events. 359/690 cut-off events. For 2325/2325 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3225 event pairs, 60 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 2885. Up to 332 conditions per place. [2022-11-25 16:51:26,468 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 77 selfloop transitions, 35 changer transitions 5/117 dead transitions. [2022-11-25 16:51:26,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 1137 flow [2022-11-25 16:51:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:51:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:51:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1724 transitions. [2022-11-25 16:51:26,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41824357108199905 [2022-11-25 16:51:26,473 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1724 transitions. [2022-11-25 16:51:26,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1724 transitions. [2022-11-25 16:51:26,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:26,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1724 transitions. [2022-11-25 16:51:26,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.55555555555554) internal successors, (1724), 9 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:26,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:51:26,485 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:51:26,486 INFO L175 Difference]: Start difference. First operand has 102 places, 79 transitions, 760 flow. Second operand 9 states and 1724 transitions. [2022-11-25 16:51:26,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 1137 flow [2022-11-25 16:51:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 117 transitions, 1048 flow, removed 13 selfloop flow, removed 8 redundant places. [2022-11-25 16:51:26,507 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 746 flow [2022-11-25 16:51:26,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=746, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2022-11-25 16:51:26,509 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2022-11-25 16:51:26,509 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 746 flow [2022-11-25 16:51:26,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:26,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:26,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:26,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:26,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:26,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:26,718 INFO L85 PathProgramCache]: Analyzing trace with hash 861403054, now seen corresponding path program 4 times [2022-11-25 16:51:26,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:26,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000632432] [2022-11-25 16:51:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:26,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000632432] [2022-11-25 16:51:27,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000632432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157763351] [2022-11-25 16:51:27,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:51:27,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:27,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:27,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:51:27,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:51:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 16:51:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:27,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:27,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:27,845 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 161 treesize of output 125 [2022-11-25 16:51:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157763351] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:28,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-11-25 16:51:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860077404] [2022-11-25 16:51:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:28,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:51:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:51:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:51:29,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:51:29,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 746 flow. Second operand has 10 states, 10 states have (on average 176.6) internal successors, (1766), 10 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:29,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:29,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:51:29,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:31,030 INFO L130 PetriNetUnfolder]: 339/670 cut-off events. [2022-11-25 16:51:31,030 INFO L131 PetriNetUnfolder]: For 2065/2065 co-relation queries the response was YES. [2022-11-25 16:51:31,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 670 events. 339/670 cut-off events. For 2065/2065 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3208 event pairs, 80 based on Foata normal form. 19/641 useless extension candidates. Maximal degree in co-relation 2720. Up to 163 conditions per place. [2022-11-25 16:51:31,038 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 92 selfloop transitions, 41 changer transitions 7/140 dead transitions. [2022-11-25 16:51:31,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 140 transitions, 1250 flow [2022-11-25 16:51:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:51:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:51:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2381 transitions. [2022-11-25 16:51:31,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39989922741014444 [2022-11-25 16:51:31,045 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2381 transitions. [2022-11-25 16:51:31,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2381 transitions. [2022-11-25 16:51:31,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:31,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2381 transitions. [2022-11-25 16:51:31,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:31,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:31,060 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:31,060 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 746 flow. Second operand 13 states and 2381 transitions. [2022-11-25 16:51:31,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 140 transitions, 1250 flow [2022-11-25 16:51:31,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1170 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-11-25 16:51:31,074 INFO L231 Difference]: Finished difference. Result has 111 places, 80 transitions, 854 flow [2022-11-25 16:51:31,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=854, PETRI_PLACES=111, PETRI_TRANSITIONS=80} [2022-11-25 16:51:31,075 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2022-11-25 16:51:31,075 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 80 transitions, 854 flow [2022-11-25 16:51:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.6) internal successors, (1766), 10 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:31,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:31,076 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:31,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:31,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:31,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1395853594, now seen corresponding path program 5 times [2022-11-25 16:51:31,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124404126] [2022-11-25 16:51:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:31,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:31,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:31,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124404126] [2022-11-25 16:51:31,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124404126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:31,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628505412] [2022-11-25 16:51:31,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:51:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:31,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:31,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:31,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:51:31,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:51:31,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 16:51:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:32,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:32,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:32,417 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 161 treesize of output 125 [2022-11-25 16:51:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:33,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628505412] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:33,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:33,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-11-25 16:51:33,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194207847] [2022-11-25 16:51:33,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:33,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:51:33,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:33,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:51:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:51:33,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:51:33,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 80 transitions, 854 flow. Second operand has 10 states, 10 states have (on average 176.6) internal successors, (1766), 10 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:33,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:33,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:51:33,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:35,304 INFO L130 PetriNetUnfolder]: 339/668 cut-off events. [2022-11-25 16:51:35,305 INFO L131 PetriNetUnfolder]: For 2771/2771 co-relation queries the response was YES. [2022-11-25 16:51:35,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 668 events. 339/668 cut-off events. For 2771/2771 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3175 event pairs, 80 based on Foata normal form. 1/619 useless extension candidates. Maximal degree in co-relation 2881. Up to 163 conditions per place. [2022-11-25 16:51:35,313 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 97 selfloop transitions, 41 changer transitions 5/143 dead transitions. [2022-11-25 16:51:35,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 143 transitions, 1357 flow [2022-11-25 16:51:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:51:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:51:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2380 transitions. [2022-11-25 16:51:35,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39973127309371853 [2022-11-25 16:51:35,318 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2380 transitions. [2022-11-25 16:51:35,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2380 transitions. [2022-11-25 16:51:35,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:35,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2380 transitions. [2022-11-25 16:51:35,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:35,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:35,333 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:35,334 INFO L175 Difference]: Start difference. First operand has 111 places, 80 transitions, 854 flow. Second operand 13 states and 2380 transitions. [2022-11-25 16:51:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 143 transitions, 1357 flow [2022-11-25 16:51:35,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 1247 flow, removed 33 selfloop flow, removed 9 redundant places. [2022-11-25 16:51:35,355 INFO L231 Difference]: Finished difference. Result has 114 places, 81 transitions, 873 flow [2022-11-25 16:51:35,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=873, PETRI_PLACES=114, PETRI_TRANSITIONS=81} [2022-11-25 16:51:35,356 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2022-11-25 16:51:35,356 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 81 transitions, 873 flow [2022-11-25 16:51:35,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.6) internal successors, (1766), 10 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:35,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:35,358 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:35,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:35,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 16:51:35,576 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1190284332, now seen corresponding path program 6 times [2022-11-25 16:51:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:35,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142714876] [2022-11-25 16:51:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:35,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142714876] [2022-11-25 16:51:35,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142714876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401748506] [2022-11-25 16:51:35,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:51:35,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:35,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:35,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:35,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:51:36,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 16:51:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 16:51:36,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:36,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:36,236 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 111 treesize of output 76 [2022-11-25 16:51:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:51:36,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:51:36,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401748506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:36,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:51:36,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-11-25 16:51:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637963571] [2022-11-25 16:51:36,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:36,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:51:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:51:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:51:36,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 458 [2022-11-25 16:51:36,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 81 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:36,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:36,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 458 [2022-11-25 16:51:36,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:37,031 INFO L130 PetriNetUnfolder]: 338/661 cut-off events. [2022-11-25 16:51:37,031 INFO L131 PetriNetUnfolder]: For 2474/2474 co-relation queries the response was YES. [2022-11-25 16:51:37,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2919 conditions, 661 events. 338/661 cut-off events. For 2474/2474 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3100 event pairs, 80 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 2865. Up to 239 conditions per place. [2022-11-25 16:51:37,040 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 74 selfloop transitions, 39 changer transitions 5/118 dead transitions. [2022-11-25 16:51:37,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 118 transitions, 1222 flow [2022-11-25 16:51:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:51:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:51:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1723 transitions. [2022-11-25 16:51:37,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4180009704027171 [2022-11-25 16:51:37,045 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1723 transitions. [2022-11-25 16:51:37,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1723 transitions. [2022-11-25 16:51:37,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:37,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1723 transitions. [2022-11-25 16:51:37,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.44444444444446) internal successors, (1723), 9 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:37,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:51:37,056 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:51:37,056 INFO L175 Difference]: Start difference. First operand has 114 places, 81 transitions, 873 flow. Second operand 9 states and 1723 transitions. [2022-11-25 16:51:37,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 118 transitions, 1222 flow [2022-11-25 16:51:37,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 118 transitions, 1151 flow, removed 2 selfloop flow, removed 10 redundant places. [2022-11-25 16:51:37,075 INFO L231 Difference]: Finished difference. Result has 112 places, 80 transitions, 873 flow [2022-11-25 16:51:37,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=112, PETRI_TRANSITIONS=80} [2022-11-25 16:51:37,075 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 87 predicate places. [2022-11-25 16:51:37,076 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 80 transitions, 873 flow [2022-11-25 16:51:37,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:37,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:37,077 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:37,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:51:37,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2009875996, now seen corresponding path program 1 times [2022-11-25 16:51:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:37,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279129685] [2022-11-25 16:51:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:37,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279129685] [2022-11-25 16:51:37,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279129685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894502683] [2022-11-25 16:51:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:37,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:37,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:51:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 16:51:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:37,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:37,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894502683] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:37,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:37,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-11-25 16:51:37,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177751185] [2022-11-25 16:51:37,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:51:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:51:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:51:37,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 458 [2022-11-25 16:51:37,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 80 transitions, 873 flow. Second operand has 7 states, 7 states have (on average 192.42857142857142) internal successors, (1347), 7 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:37,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:37,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 458 [2022-11-25 16:51:37,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:38,399 INFO L130 PetriNetUnfolder]: 357/699 cut-off events. [2022-11-25 16:51:38,399 INFO L131 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2022-11-25 16:51:38,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3129 conditions, 699 events. 357/699 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3384 event pairs, 64 based on Foata normal form. 8/657 useless extension candidates. Maximal degree in co-relation 3073. Up to 248 conditions per place. [2022-11-25 16:51:38,409 INFO L137 encePairwiseOnDemand]: 449/458 looper letters, 120 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2022-11-25 16:51:38,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 135 transitions, 1445 flow [2022-11-25 16:51:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:51:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:51:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1983 transitions. [2022-11-25 16:51:38,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329694323144105 [2022-11-25 16:51:38,414 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1983 transitions. [2022-11-25 16:51:38,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1983 transitions. [2022-11-25 16:51:38,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:38,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1983 transitions. [2022-11-25 16:51:38,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:38,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:38,426 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:38,426 INFO L175 Difference]: Start difference. First operand has 112 places, 80 transitions, 873 flow. Second operand 10 states and 1983 transitions. [2022-11-25 16:51:38,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 135 transitions, 1445 flow [2022-11-25 16:51:38,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 135 transitions, 1337 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-25 16:51:38,442 INFO L231 Difference]: Finished difference. Result has 111 places, 87 transitions, 861 flow [2022-11-25 16:51:38,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=861, PETRI_PLACES=111, PETRI_TRANSITIONS=87} [2022-11-25 16:51:38,443 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2022-11-25 16:51:38,443 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 87 transitions, 861 flow [2022-11-25 16:51:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 192.42857142857142) internal successors, (1347), 7 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:38,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:38,445 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:38,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:38,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:51:38,652 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1662631753, now seen corresponding path program 1 times [2022-11-25 16:51:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:38,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047979123] [2022-11-25 16:51:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:38,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047979123] [2022-11-25 16:51:38,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047979123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:38,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:38,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:51:38,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607748631] [2022-11-25 16:51:38,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:51:38,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:51:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:51:38,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 458 [2022-11-25 16:51:38,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 87 transitions, 861 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:38,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:38,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 458 [2022-11-25 16:51:38,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:39,083 INFO L130 PetriNetUnfolder]: 209/423 cut-off events. [2022-11-25 16:51:39,084 INFO L131 PetriNetUnfolder]: For 1623/1623 co-relation queries the response was YES. [2022-11-25 16:51:39,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 423 events. 209/423 cut-off events. For 1623/1623 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1696 event pairs, 122 based on Foata normal form. 28/451 useless extension candidates. Maximal degree in co-relation 1924. Up to 354 conditions per place. [2022-11-25 16:51:39,089 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 47 selfloop transitions, 2 changer transitions 35/84 dead transitions. [2022-11-25 16:51:39,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 84 transitions, 876 flow [2022-11-25 16:51:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:51:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:51:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1434 transitions. [2022-11-25 16:51:39,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4472863381160324 [2022-11-25 16:51:39,092 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1434 transitions. [2022-11-25 16:51:39,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1434 transitions. [2022-11-25 16:51:39,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:39,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1434 transitions. [2022-11-25 16:51:39,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,100 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,101 INFO L175 Difference]: Start difference. First operand has 111 places, 87 transitions, 861 flow. Second operand 7 states and 1434 transitions. [2022-11-25 16:51:39,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 84 transitions, 876 flow [2022-11-25 16:51:39,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 84 transitions, 819 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-25 16:51:39,111 INFO L231 Difference]: Finished difference. Result has 101 places, 49 transitions, 383 flow [2022-11-25 16:51:39,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=101, PETRI_TRANSITIONS=49} [2022-11-25 16:51:39,111 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2022-11-25 16:51:39,111 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 49 transitions, 383 flow [2022-11-25 16:51:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:39,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 16:51:39,113 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -667899131, now seen corresponding path program 1 times [2022-11-25 16:51:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:39,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857788] [2022-11-25 16:51:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:39,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:51:39,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857788] [2022-11-25 16:51:39,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:51:39,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:51:39,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:51:39,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645521727] [2022-11-25 16:51:39,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:51:39,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:51:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:51:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:51:39,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 458 [2022-11-25 16:51:39,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 49 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:39,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 458 [2022-11-25 16:51:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:39,511 INFO L130 PetriNetUnfolder]: 113/221 cut-off events. [2022-11-25 16:51:39,511 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2022-11-25 16:51:39,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 221 events. 113/221 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 665 event pairs, 65 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 977. Up to 188 conditions per place. [2022-11-25 16:51:39,514 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 29 selfloop transitions, 2 changer transitions 16/47 dead transitions. [2022-11-25 16:51:39,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 47 transitions, 413 flow [2022-11-25 16:51:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:51:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:51:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1023 transitions. [2022-11-25 16:51:39,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4467248908296943 [2022-11-25 16:51:39,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1023 transitions. [2022-11-25 16:51:39,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1023 transitions. [2022-11-25 16:51:39,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:39,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1023 transitions. [2022-11-25 16:51:39,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.6) internal successors, (1023), 5 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,524 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,524 INFO L175 Difference]: Start difference. First operand has 101 places, 49 transitions, 383 flow. Second operand 5 states and 1023 transitions. [2022-11-25 16:51:39,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 47 transitions, 413 flow [2022-11-25 16:51:39,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 47 transitions, 341 flow, removed 20 selfloop flow, removed 19 redundant places. [2022-11-25 16:51:39,530 INFO L231 Difference]: Finished difference. Result has 59 places, 31 transitions, 160 flow [2022-11-25 16:51:39,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=31} [2022-11-25 16:51:39,530 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2022-11-25 16:51:39,531 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 31 transitions, 160 flow [2022-11-25 16:51:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:39,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:39,531 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:39,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 16:51:39,532 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash -73131497, now seen corresponding path program 1 times [2022-11-25 16:51:39,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:39,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43804353] [2022-11-25 16:51:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43804353] [2022-11-25 16:51:40,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43804353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932669012] [2022-11-25 16:51:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:40,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:40,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:51:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:40,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 16:51:40,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:40,422 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 11 treesize of output 7 [2022-11-25 16:51:40,473 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 6 treesize of output 5 [2022-11-25 16:51:40,567 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 6 treesize of output 5 [2022-11-25 16:51:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:40,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:41,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,398 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 48 treesize of output 37 [2022-11-25 16:51:41,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,415 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 294 treesize of output 274 [2022-11-25 16:51:41,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,432 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 262 treesize of output 239 [2022-11-25 16:51:41,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,448 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 230 treesize of output 223 [2022-11-25 16:51:41,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,638 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 48 treesize of output 37 [2022-11-25 16:51:41,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,653 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 294 treesize of output 274 [2022-11-25 16:51:41,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,669 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 262 treesize of output 255 [2022-11-25 16:51:41,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:51:41,687 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 246 treesize of output 223 [2022-11-25 16:51:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:41,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932669012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:41,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:51:41,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-11-25 16:51:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021161598] [2022-11-25 16:51:41,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:41,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 16:51:41,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 16:51:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=525, Unknown=32, NotChecked=0, Total=702 [2022-11-25 16:51:42,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 458 [2022-11-25 16:51:42,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 31 transitions, 160 flow. Second operand has 27 states, 27 states have (on average 137.59259259259258) internal successors, (3715), 27 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:42,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:42,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 458 [2022-11-25 16:51:42,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:44,086 INFO L130 PetriNetUnfolder]: 294/521 cut-off events. [2022-11-25 16:51:44,086 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2022-11-25 16:51:44,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 521 events. 294/521 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2057 event pairs, 52 based on Foata normal form. 16/537 useless extension candidates. Maximal degree in co-relation 1763. Up to 156 conditions per place. [2022-11-25 16:51:44,091 INFO L137 encePairwiseOnDemand]: 444/458 looper letters, 78 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2022-11-25 16:51:44,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 97 transitions, 642 flow [2022-11-25 16:51:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:51:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:51:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1856 transitions. [2022-11-25 16:51:44,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3117232112865301 [2022-11-25 16:51:44,097 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1856 transitions. [2022-11-25 16:51:44,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1856 transitions. [2022-11-25 16:51:44,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:44,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1856 transitions. [2022-11-25 16:51:44,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.76923076923077) internal successors, (1856), 13 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:44,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:44,112 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:44,112 INFO L175 Difference]: Start difference. First operand has 59 places, 31 transitions, 160 flow. Second operand 13 states and 1856 transitions. [2022-11-25 16:51:44,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 97 transitions, 642 flow [2022-11-25 16:51:44,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 586 flow, removed 26 selfloop flow, removed 9 redundant places. [2022-11-25 16:51:44,118 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 265 flow [2022-11-25 16:51:44,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2022-11-25 16:51:44,119 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 32 predicate places. [2022-11-25 16:51:44,119 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 265 flow [2022-11-25 16:51:44,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.59259259259258) internal successors, (3715), 27 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:44,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:44,120 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:44,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 16:51:44,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:44,329 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -129827021, now seen corresponding path program 2 times [2022-11-25 16:51:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375304268] [2022-11-25 16:51:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375304268] [2022-11-25 16:51:45,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375304268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:45,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931138331] [2022-11-25 16:51:45,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:51:45,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:45,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:45,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:45,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:51:45,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:51:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 16:51:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:46,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:46,289 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:51:46,290 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 20 treesize of output 4 [2022-11-25 16:51:46,299 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:51:46,299 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 20 treesize of output 4 [2022-11-25 16:51:46,359 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 16:51:46,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-11-25 16:51:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:46,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931138331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:46,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:51:46,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2022-11-25 16:51:46,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103296395] [2022-11-25 16:51:46,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:46,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 16:51:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 16:51:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-25 16:51:48,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 458 [2022-11-25 16:51:48,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 265 flow. Second operand has 25 states, 25 states have (on average 171.76) internal successors, (4294), 25 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:48,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:48,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 458 [2022-11-25 16:51:48,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:49,781 INFO L130 PetriNetUnfolder]: 406/723 cut-off events. [2022-11-25 16:51:49,781 INFO L131 PetriNetUnfolder]: For 1384/1384 co-relation queries the response was YES. [2022-11-25 16:51:49,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2868 conditions, 723 events. 406/723 cut-off events. For 1384/1384 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3188 event pairs, 112 based on Foata normal form. 16/739 useless extension candidates. Maximal degree in co-relation 2835. Up to 379 conditions per place. [2022-11-25 16:51:49,787 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 77 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2022-11-25 16:51:49,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 783 flow [2022-11-25 16:51:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:51:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:51:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2115 transitions. [2022-11-25 16:51:49,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.384825327510917 [2022-11-25 16:51:49,793 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2115 transitions. [2022-11-25 16:51:49,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2115 transitions. [2022-11-25 16:51:49,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:49,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2115 transitions. [2022-11-25 16:51:49,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 176.25) internal successors, (2115), 12 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:49,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:49,806 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:49,806 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 265 flow. Second operand 12 states and 2115 transitions. [2022-11-25 16:51:49,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 783 flow [2022-11-25 16:51:49,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 757 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-25 16:51:49,813 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 429 flow [2022-11-25 16:51:49,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=429, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2022-11-25 16:51:49,814 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2022-11-25 16:51:49,814 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 429 flow [2022-11-25 16:51:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 171.76) internal successors, (4294), 25 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:49,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:49,815 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:49,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:50,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:50,021 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 405081177, now seen corresponding path program 3 times [2022-11-25 16:51:50,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:50,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542292286] [2022-11-25 16:51:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:50,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:51:50,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:50,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542292286] [2022-11-25 16:51:50,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542292286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:50,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123881533] [2022-11-25 16:51:50,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:51:50,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:50,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:50,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:50,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:51:50,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:51:50,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 16:51:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:51:51,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:52,714 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:51:52,714 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 20 treesize of output 4 [2022-11-25 16:51:52,772 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-25 16:51:52,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-11-25 16:51:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:51:52,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123881533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:52,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:51:52,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-11-25 16:51:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675269059] [2022-11-25 16:51:52,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:52,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 16:51:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 16:51:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:51:57,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 458 [2022-11-25 16:51:57,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 429 flow. Second operand has 26 states, 26 states have (on average 160.19230769230768) internal successors, (4165), 26 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:57,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:51:57,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 458 [2022-11-25 16:51:57,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:51:59,303 INFO L130 PetriNetUnfolder]: 434/787 cut-off events. [2022-11-25 16:51:59,304 INFO L131 PetriNetUnfolder]: For 2381/2381 co-relation queries the response was YES. [2022-11-25 16:51:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 787 events. 434/787 cut-off events. For 2381/2381 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3613 event pairs, 55 based on Foata normal form. 16/803 useless extension candidates. Maximal degree in co-relation 3448. Up to 254 conditions per place. [2022-11-25 16:51:59,310 INFO L137 encePairwiseOnDemand]: 443/458 looper letters, 99 selfloop transitions, 47 changer transitions 0/146 dead transitions. [2022-11-25 16:51:59,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 146 transitions, 1302 flow [2022-11-25 16:51:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:51:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:51:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2959 transitions. [2022-11-25 16:51:59,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.358927704997574 [2022-11-25 16:51:59,317 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2959 transitions. [2022-11-25 16:51:59,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2959 transitions. [2022-11-25 16:51:59,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:51:59,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2959 transitions. [2022-11-25 16:51:59,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 164.38888888888889) internal successors, (2959), 18 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:59,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:59,333 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:59,333 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 429 flow. Second operand 18 states and 2959 transitions. [2022-11-25 16:51:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 146 transitions, 1302 flow [2022-11-25 16:51:59,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 146 transitions, 1279 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-25 16:51:59,344 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 811 flow [2022-11-25 16:51:59,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=811, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2022-11-25 16:51:59,345 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2022-11-25 16:51:59,345 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 811 flow [2022-11-25 16:51:59,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 160.19230769230768) internal successors, (4165), 26 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:59,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:51:59,346 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:59,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:59,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:51:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1978280307, now seen corresponding path program 4 times [2022-11-25 16:51:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:59,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761942550] [2022-11-25 16:51:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:00,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:00,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761942550] [2022-11-25 16:52:00,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761942550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:00,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042494659] [2022-11-25 16:52:00,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:52:00,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:00,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:00,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:52:00,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:52:00,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:52:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:52:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:52:00,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:52:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042494659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:52:00,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:52:00,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2022-11-25 16:52:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492374055] [2022-11-25 16:52:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:52:00,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:52:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:52:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:52:00,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:52:01,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:52:01,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 811 flow. Second operand has 8 states, 8 states have (on average 187.375) internal successors, (1499), 8 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:01,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:52:01,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:52:01,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:52:01,715 INFO L130 PetriNetUnfolder]: 422/755 cut-off events. [2022-11-25 16:52:01,715 INFO L131 PetriNetUnfolder]: For 3041/3041 co-relation queries the response was YES. [2022-11-25 16:52:01,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 755 events. 422/755 cut-off events. For 3041/3041 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3356 event pairs, 140 based on Foata normal form. 6/761 useless extension candidates. Maximal degree in co-relation 3670. Up to 473 conditions per place. [2022-11-25 16:52:01,723 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 73 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2022-11-25 16:52:01,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 106 transitions, 1139 flow [2022-11-25 16:52:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:52:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 16:52:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1544 transitions. [2022-11-25 16:52:01,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42139737991266374 [2022-11-25 16:52:01,727 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1544 transitions. [2022-11-25 16:52:01,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1544 transitions. [2022-11-25 16:52:01,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:52:01,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1544 transitions. [2022-11-25 16:52:01,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:01,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:01,734 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:01,734 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 811 flow. Second operand 8 states and 1544 transitions. [2022-11-25 16:52:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 106 transitions, 1139 flow [2022-11-25 16:52:01,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 1031 flow, removed 27 selfloop flow, removed 8 redundant places. [2022-11-25 16:52:01,751 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 822 flow [2022-11-25 16:52:01,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=822, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-11-25 16:52:01,752 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2022-11-25 16:52:01,752 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 822 flow [2022-11-25 16:52:01,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.375) internal successors, (1499), 8 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:01,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:52:01,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:52:01,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:52:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:01,958 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:52:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:52:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1830003713, now seen corresponding path program 5 times [2022-11-25 16:52:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:52:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857118448] [2022-11-25 16:52:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:52:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:02,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:02,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857118448] [2022-11-25 16:52:02,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857118448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:02,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933131612] [2022-11-25 16:52:02,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:52:02,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:02,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:02,473 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:02,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:52:02,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:52:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:52:02,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 16:52:02,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:52:02,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:52:02,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933131612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:52:02,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:52:02,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-11-25 16:52:02,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815369147] [2022-11-25 16:52:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:52:02,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:52:02,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:52:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:52:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:52:03,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:52:03,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 822 flow. Second operand has 9 states, 9 states have (on average 187.11111111111111) internal successors, (1684), 9 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:03,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:52:03,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:52:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:52:03,689 INFO L130 PetriNetUnfolder]: 424/761 cut-off events. [2022-11-25 16:52:03,689 INFO L131 PetriNetUnfolder]: For 2418/2418 co-relation queries the response was YES. [2022-11-25 16:52:03,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 761 events. 424/761 cut-off events. For 2418/2418 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3417 event pairs, 138 based on Foata normal form. 2/763 useless extension candidates. Maximal degree in co-relation 3714. Up to 473 conditions per place. [2022-11-25 16:52:03,697 INFO L137 encePairwiseOnDemand]: 450/458 looper letters, 93 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2022-11-25 16:52:03,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 1270 flow [2022-11-25 16:52:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:52:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:52:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1357 transitions. [2022-11-25 16:52:03,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42326887086712417 [2022-11-25 16:52:03,701 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1357 transitions. [2022-11-25 16:52:03,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1357 transitions. [2022-11-25 16:52:03,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:52:03,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1357 transitions. [2022-11-25 16:52:03,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.85714285714286) internal successors, (1357), 7 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:03,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:03,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:03,708 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 822 flow. Second operand 7 states and 1357 transitions. [2022-11-25 16:52:03,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 1270 flow [2022-11-25 16:52:03,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 120 transitions, 1208 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-11-25 16:52:03,723 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 905 flow [2022-11-25 16:52:03,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=905, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2022-11-25 16:52:03,724 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2022-11-25 16:52:03,725 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 905 flow [2022-11-25 16:52:03,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.11111111111111) internal successors, (1684), 9 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:03,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:52:03,725 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:52:03,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:52:03,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 16:52:03,938 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:52:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:52:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 806004287, now seen corresponding path program 6 times [2022-11-25 16:52:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:52:03,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159045563] [2022-11-25 16:52:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:52:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:04,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:04,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159045563] [2022-11-25 16:52:04,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159045563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:04,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569387530] [2022-11-25 16:52:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:52:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:04,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:04,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:52:04,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 16:52:04,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:52:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 16:52:04,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:04,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:52:04,987 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:52:04,987 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 20 treesize of output 4 [2022-11-25 16:52:04,995 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:52:04,996 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 20 treesize of output 4 [2022-11-25 16:52:05,055 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 16:52:05,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-11-25 16:52:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:05,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569387530] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:05,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:52:05,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2022-11-25 16:52:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246600342] [2022-11-25 16:52:05,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:52:05,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:52:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:52:05,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:52:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:52:05,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 458 [2022-11-25 16:52:05,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 905 flow. Second operand has 10 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:05,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:52:05,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 458 [2022-11-25 16:52:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:52:06,572 INFO L130 PetriNetUnfolder]: 422/743 cut-off events. [2022-11-25 16:52:06,572 INFO L131 PetriNetUnfolder]: For 2767/2767 co-relation queries the response was YES. [2022-11-25 16:52:06,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3803 conditions, 743 events. 422/743 cut-off events. For 2767/2767 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3263 event pairs, 96 based on Foata normal form. 2/745 useless extension candidates. Maximal degree in co-relation 3760. Up to 391 conditions per place. [2022-11-25 16:52:06,581 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 84 selfloop transitions, 55 changer transitions 0/139 dead transitions. [2022-11-25 16:52:06,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1475 flow [2022-11-25 16:52:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:52:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 16:52:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2563 transitions. [2022-11-25 16:52:06,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39971927635683097 [2022-11-25 16:52:06,586 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2563 transitions. [2022-11-25 16:52:06,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2563 transitions. [2022-11-25 16:52:06,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:52:06,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2563 transitions. [2022-11-25 16:52:06,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:06,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:06,599 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:06,599 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 905 flow. Second operand 14 states and 2563 transitions. [2022-11-25 16:52:06,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1475 flow [2022-11-25 16:52:06,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1405 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-11-25 16:52:06,617 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 1068 flow [2022-11-25 16:52:06,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1068, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2022-11-25 16:52:06,618 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 79 predicate places. [2022-11-25 16:52:06,618 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 1068 flow [2022-11-25 16:52:06,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:06,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:52:06,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:52:06,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:52:06,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 16:52:06,825 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:52:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:52:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1265918055, now seen corresponding path program 7 times [2022-11-25 16:52:06,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:52:06,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053708469] [2022-11-25 16:52:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:06,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:52:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:07,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053708469] [2022-11-25 16:52:07,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053708469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678203467] [2022-11-25 16:52:07,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:52:07,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:07,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:07,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:07,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:52:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 16:52:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:07,847 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 11 treesize of output 7 [2022-11-25 16:52:07,917 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 6 treesize of output 5 [2022-11-25 16:52:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:52:08,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:52:08,163 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 16:52:08,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-11-25 16:52:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:52:08,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:52:08,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:52:08,768 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 42 treesize of output 31 [2022-11-25 16:52:08,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:52:08,781 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 70 treesize of output 66 [2022-11-25 16:52:08,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:52:08,816 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 54 treesize of output 55 [2022-11-25 16:52:08,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:52:08,857 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 90 treesize of output 54 [2022-11-25 16:52:08,872 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:52:08,873 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 1212 treesize of output 1068 [2022-11-25 16:52:08,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:52:08,905 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 1014 treesize of output 894 [2022-11-25 16:52:08,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:52:08,931 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 940 treesize of output 876 [2022-11-25 16:54:33,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:33,928 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 42 treesize of output 31 [2022-11-25 16:54:33,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:33,951 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 70 treesize of output 66 [2022-11-25 16:54:33,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:33,966 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 54 treesize of output 55 [2022-11-25 16:54:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678203467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:34,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-25 16:54:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512369124] [2022-11-25 16:54:34,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:34,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 16:54:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 16:54:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=744, Unknown=8, NotChecked=0, Total=870 [2022-11-25 16:54:35,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 458 [2022-11-25 16:54:35,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 1068 flow. Second operand has 30 states, 30 states have (on average 137.5) internal successors, (4125), 30 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:35,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:35,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 458 [2022-11-25 16:54:35,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:36,813 INFO L130 PetriNetUnfolder]: 447/786 cut-off events. [2022-11-25 16:54:36,813 INFO L131 PetriNetUnfolder]: For 3349/3349 co-relation queries the response was YES. [2022-11-25 16:54:36,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4134 conditions, 786 events. 447/786 cut-off events. For 3349/3349 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3491 event pairs, 63 based on Foata normal form. 18/804 useless extension candidates. Maximal degree in co-relation 4086. Up to 388 conditions per place. [2022-11-25 16:54:36,821 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 96 selfloop transitions, 40 changer transitions 0/136 dead transitions. [2022-11-25 16:54:36,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 136 transitions, 1577 flow [2022-11-25 16:54:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:54:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:54:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1559 transitions. [2022-11-25 16:54:36,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3094481937276697 [2022-11-25 16:54:36,825 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1559 transitions. [2022-11-25 16:54:36,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1559 transitions. [2022-11-25 16:54:36,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:36,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1559 transitions. [2022-11-25 16:54:36,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 141.72727272727272) internal successors, (1559), 11 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:36,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:36,835 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:36,835 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 1068 flow. Second operand 11 states and 1559 transitions. [2022-11-25 16:54:36,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 136 transitions, 1577 flow [2022-11-25 16:54:36,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 136 transitions, 1505 flow, removed 18 selfloop flow, removed 7 redundant places. [2022-11-25 16:54:36,855 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 1154 flow [2022-11-25 16:54:36,855 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1154, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2022-11-25 16:54:36,856 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2022-11-25 16:54:36,856 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 1154 flow [2022-11-25 16:54:36,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 137.5) internal successors, (4125), 30 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:36,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:36,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:36,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 16:54:37,064 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash 129286921, now seen corresponding path program 8 times [2022-11-25 16:54:37,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:37,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433495000] [2022-11-25 16:54:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:37,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433495000] [2022-11-25 16:54:37,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433495000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:37,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046661416] [2022-11-25 16:54:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:54:37,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:37,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:37,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:54:37,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:54:37,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 16:54:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:54:38,391 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 18 treesize of output 20 [2022-11-25 16:54:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:38,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:38,889 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (let ((.cse3 (forall ((v_ArrVal_722 (Array Int Int)) (~get2~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_722) ~get2~0.base) .cse2)))))) (and (forall ((v_ArrVal_722 (Array Int Int)) (~get2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_722))) (let ((.cse0 (select .cse1 ~get2~0.base))) (or (= (select .cse0 c_~get2~0.offset) (select (select .cse1 c_~get1~0.base) c_~get1~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select .cse0 .cse2))))))) (or (< 0 c_~n2~0) .cse3) (or (< 0 c_~n1~0) .cse3)))) is different from false [2022-11-25 16:54:38,965 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-11-25 16:54:38,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-11-25 16:54:38,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:38,992 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 74 treesize of output 90 [2022-11-25 16:54:39,463 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:54:39,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-11-25 16:54:39,475 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:54:39,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-11-25 16:54:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:39,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046661416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:39,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:39,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-11-25 16:54:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989211934] [2022-11-25 16:54:39,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 16:54:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 16:54:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=647, Unknown=1, NotChecked=52, Total=812 [2022-11-25 16:54:40,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 458 [2022-11-25 16:54:40,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 1154 flow. Second operand has 29 states, 29 states have (on average 141.58620689655172) internal successors, (4106), 29 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:40,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:40,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 458 [2022-11-25 16:54:40,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:41,288 INFO L130 PetriNetUnfolder]: 475/850 cut-off events. [2022-11-25 16:54:41,289 INFO L131 PetriNetUnfolder]: For 4155/4155 co-relation queries the response was YES. [2022-11-25 16:54:41,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4619 conditions, 850 events. 475/850 cut-off events. For 4155/4155 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3886 event pairs, 128 based on Foata normal form. 16/866 useless extension candidates. Maximal degree in co-relation 4571. Up to 470 conditions per place. [2022-11-25 16:54:41,296 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 90 selfloop transitions, 49 changer transitions 0/139 dead transitions. [2022-11-25 16:54:41,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 139 transitions, 1654 flow [2022-11-25 16:54:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:54:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:54:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1605 transitions. [2022-11-25 16:54:41,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3185788011115522 [2022-11-25 16:54:41,300 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1605 transitions. [2022-11-25 16:54:41,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1605 transitions. [2022-11-25 16:54:41,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:41,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1605 transitions. [2022-11-25 16:54:41,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.9090909090909) internal successors, (1605), 11 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:41,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:41,311 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:41,311 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 1154 flow. Second operand 11 states and 1605 transitions. [2022-11-25 16:54:41,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 139 transitions, 1654 flow [2022-11-25 16:54:41,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 139 transitions, 1604 flow, removed 9 selfloop flow, removed 7 redundant places. [2022-11-25 16:54:41,334 INFO L231 Difference]: Finished difference. Result has 115 places, 110 transitions, 1321 flow [2022-11-25 16:54:41,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1321, PETRI_PLACES=115, PETRI_TRANSITIONS=110} [2022-11-25 16:54:41,335 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 90 predicate places. [2022-11-25 16:54:41,336 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 110 transitions, 1321 flow [2022-11-25 16:54:41,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 141.58620689655172) internal successors, (4106), 29 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:41,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:41,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:41,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-25 16:54:41,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 16:54:41,543 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -899101647, now seen corresponding path program 9 times [2022-11-25 16:54:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:41,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265257784] [2022-11-25 16:54:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:41,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:42,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:42,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265257784] [2022-11-25 16:54:42,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265257784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:42,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305419966] [2022-11-25 16:54:42,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:54:42,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:42,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:42,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:54:42,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:54:42,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 16:54:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:43,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:43,224 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:54:43,225 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 20 treesize of output 4 [2022-11-25 16:54:43,232 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:54:43,232 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 20 treesize of output 4 [2022-11-25 16:54:43,286 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 16:54:43,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-11-25 16:54:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:43,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305419966] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:43,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:54:43,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 10] total 24 [2022-11-25 16:54:43,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232264820] [2022-11-25 16:54:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:43,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:54:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:54:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-11-25 16:54:44,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 458 [2022-11-25 16:54:44,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 110 transitions, 1321 flow. Second operand has 10 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:44,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:44,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 458 [2022-11-25 16:54:44,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:44,798 INFO L130 PetriNetUnfolder]: 543/984 cut-off events. [2022-11-25 16:54:44,799 INFO L131 PetriNetUnfolder]: For 5825/5825 co-relation queries the response was YES. [2022-11-25 16:54:44,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5598 conditions, 984 events. 543/984 cut-off events. For 5825/5825 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4779 event pairs, 115 based on Foata normal form. 16/1000 useless extension candidates. Maximal degree in co-relation 5548. Up to 569 conditions per place. [2022-11-25 16:54:44,812 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 126 selfloop transitions, 41 changer transitions 0/167 dead transitions. [2022-11-25 16:54:44,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 2131 flow [2022-11-25 16:54:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:54:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:54:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1837 transitions. [2022-11-25 16:54:44,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40109170305676856 [2022-11-25 16:54:44,817 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1837 transitions. [2022-11-25 16:54:44,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1837 transitions. [2022-11-25 16:54:44,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:44,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1837 transitions. [2022-11-25 16:54:44,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 183.7) internal successors, (1837), 10 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:44,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:44,828 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:44,828 INFO L175 Difference]: Start difference. First operand has 115 places, 110 transitions, 1321 flow. Second operand 10 states and 1837 transitions. [2022-11-25 16:54:44,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 2131 flow [2022-11-25 16:54:44,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 167 transitions, 2007 flow, removed 15 selfloop flow, removed 10 redundant places. [2022-11-25 16:54:44,863 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1554 flow [2022-11-25 16:54:44,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1554, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2022-11-25 16:54:44,864 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 93 predicate places. [2022-11-25 16:54:44,864 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1554 flow [2022-11-25 16:54:44,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:44,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:44,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:44,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:45,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:45,072 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash -903051437, now seen corresponding path program 10 times [2022-11-25 16:54:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:45,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938429060] [2022-11-25 16:54:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:45,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:45,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:45,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938429060] [2022-11-25 16:54:45,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938429060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:45,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075611064] [2022-11-25 16:54:45,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:54:45,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:45,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:45,656 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:45,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 16:54:45,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:54:45,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:54:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:54:46,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:54:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075611064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:46,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:54:46,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2022-11-25 16:54:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496939888] [2022-11-25 16:54:46,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:54:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:54:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:54:46,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-25 16:54:46,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1554 flow. Second operand has 8 states, 8 states have (on average 187.375) internal successors, (1499), 8 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:46,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-25 16:54:46,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:47,003 INFO L130 PetriNetUnfolder]: 550/1009 cut-off events. [2022-11-25 16:54:47,003 INFO L131 PetriNetUnfolder]: For 6250/6250 co-relation queries the response was YES. [2022-11-25 16:54:47,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5954 conditions, 1009 events. 550/1009 cut-off events. For 6250/6250 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5015 event pairs, 115 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 5902. Up to 573 conditions per place. [2022-11-25 16:54:47,011 INFO L137 encePairwiseOnDemand]: 450/458 looper letters, 126 selfloop transitions, 40 changer transitions 0/166 dead transitions. [2022-11-25 16:54:47,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 166 transitions, 2198 flow [2022-11-25 16:54:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:54:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:54:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1358 transitions. [2022-11-25 16:54:47,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42358078602620086 [2022-11-25 16:54:47,016 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1358 transitions. [2022-11-25 16:54:47,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1358 transitions. [2022-11-25 16:54:47,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:47,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1358 transitions. [2022-11-25 16:54:47,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.0) internal successors, (1358), 7 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,021 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,021 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1554 flow. Second operand 7 states and 1358 transitions. [2022-11-25 16:54:47,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 166 transitions, 2198 flow [2022-11-25 16:54:47,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 166 transitions, 2159 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-11-25 16:54:47,053 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1724 flow [2022-11-25 16:54:47,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1724, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2022-11-25 16:54:47,054 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 98 predicate places. [2022-11-25 16:54:47,054 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1724 flow [2022-11-25 16:54:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.375) internal successors, (1499), 8 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:47,055 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:47,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 16:54:47,261 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1520828053, now seen corresponding path program 11 times [2022-11-25 16:54:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219610901] [2022-11-25 16:54:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219610901] [2022-11-25 16:54:47,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219610901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649256328] [2022-11-25 16:54:47,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:54:47,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:47,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:47,967 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:47,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 16:54:48,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:54:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 16:54:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:54:48,331 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 18 treesize of output 20 [2022-11-25 16:54:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:54:48,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:54:48,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649256328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:48,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:54:48,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-25 16:54:48,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774929915] [2022-11-25 16:54:48,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:48,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:54:48,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:54:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:54:49,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 458 [2022-11-25 16:54:49,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1724 flow. Second operand has 10 states, 10 states have (on average 183.9) internal successors, (1839), 10 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:49,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:49,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 458 [2022-11-25 16:54:49,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:49,758 INFO L130 PetriNetUnfolder]: 538/977 cut-off events. [2022-11-25 16:54:49,758 INFO L131 PetriNetUnfolder]: For 6764/6764 co-relation queries the response was YES. [2022-11-25 16:54:49,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 977 events. 538/977 cut-off events. For 6764/6764 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4747 event pairs, 162 based on Foata normal form. 6/983 useless extension candidates. Maximal degree in co-relation 5938. Up to 597 conditions per place. [2022-11-25 16:54:49,767 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 92 selfloop transitions, 59 changer transitions 0/151 dead transitions. [2022-11-25 16:54:49,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 151 transitions, 2158 flow [2022-11-25 16:54:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:54:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:54:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1701 transitions. [2022-11-25 16:54:49,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4126637554585153 [2022-11-25 16:54:49,771 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1701 transitions. [2022-11-25 16:54:49,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1701 transitions. [2022-11-25 16:54:49,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:49,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1701 transitions. [2022-11-25 16:54:49,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:49,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:54:49,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:54:49,781 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1724 flow. Second operand 9 states and 1701 transitions. [2022-11-25 16:54:49,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 151 transitions, 2158 flow [2022-11-25 16:54:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 151 transitions, 2042 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-11-25 16:54:49,816 INFO L231 Difference]: Finished difference. Result has 128 places, 129 transitions, 1723 flow [2022-11-25 16:54:49,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1723, PETRI_PLACES=128, PETRI_TRANSITIONS=129} [2022-11-25 16:54:49,817 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 103 predicate places. [2022-11-25 16:54:49,818 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 129 transitions, 1723 flow [2022-11-25 16:54:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.9) internal successors, (1839), 10 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:49,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:49,819 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:49,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 16:54:50,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 16:54:50,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash -42011055, now seen corresponding path program 12 times [2022-11-25 16:54:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:50,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630779516] [2022-11-25 16:54:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:50,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630779516] [2022-11-25 16:54:50,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630779516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699487773] [2022-11-25 16:54:50,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:54:50,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:50,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:50,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 16:54:50,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 16:54:50,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 16:54:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:51,121 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:54:51,122 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 20 treesize of output 4 [2022-11-25 16:54:51,130 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:54:51,130 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 20 treesize of output 4 [2022-11-25 16:54:51,184 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 16:54:51,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-11-25 16:54:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:51,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699487773] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:51,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:54:51,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2022-11-25 16:54:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341013216] [2022-11-25 16:54:51,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:54:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:54:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:54:52,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 458 [2022-11-25 16:54:52,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 129 transitions, 1723 flow. Second operand has 10 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:52,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:52,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 458 [2022-11-25 16:54:52,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:52,795 INFO L130 PetriNetUnfolder]: 542/985 cut-off events. [2022-11-25 16:54:52,795 INFO L131 PetriNetUnfolder]: For 6472/6472 co-relation queries the response was YES. [2022-11-25 16:54:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5960 conditions, 985 events. 542/985 cut-off events. For 6472/6472 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4839 event pairs, 86 based on Foata normal form. 2/987 useless extension candidates. Maximal degree in co-relation 5905. Up to 485 conditions per place. [2022-11-25 16:54:52,807 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 95 selfloop transitions, 87 changer transitions 0/182 dead transitions. [2022-11-25 16:54:52,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 182 transitions, 2482 flow [2022-11-25 16:54:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:54:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:54:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2375 transitions. [2022-11-25 16:54:52,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39889150151158886 [2022-11-25 16:54:52,815 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2375 transitions. [2022-11-25 16:54:52,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2375 transitions. [2022-11-25 16:54:52,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:52,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2375 transitions. [2022-11-25 16:54:52,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.69230769230768) internal successors, (2375), 13 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:52,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:52,828 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:52,828 INFO L175 Difference]: Start difference. First operand has 128 places, 129 transitions, 1723 flow. Second operand 13 states and 2375 transitions. [2022-11-25 16:54:52,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 182 transitions, 2482 flow [2022-11-25 16:54:52,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 2352 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-25 16:54:52,865 INFO L231 Difference]: Finished difference. Result has 135 places, 147 transitions, 1946 flow [2022-11-25 16:54:52,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1946, PETRI_PLACES=135, PETRI_TRANSITIONS=147} [2022-11-25 16:54:52,866 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 110 predicate places. [2022-11-25 16:54:52,867 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 147 transitions, 1946 flow [2022-11-25 16:54:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:52,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:52,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:52,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 16:54:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:53,074 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash 604466061, now seen corresponding path program 13 times [2022-11-25 16:54:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:53,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970895087] [2022-11-25 16:54:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970895087] [2022-11-25 16:54:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970895087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173749031] [2022-11-25 16:54:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:54:53,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:53,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:53,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 16:54:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 16:54:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:53,872 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 11 treesize of output 7 [2022-11-25 16:54:53,926 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 6 treesize of output 5 [2022-11-25 16:54:53,989 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 6 treesize of output 5 [2022-11-25 16:54:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:54,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:54,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,506 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 48 treesize of output 37 [2022-11-25 16:54:54,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,519 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 294 treesize of output 274 [2022-11-25 16:54:54,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,535 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 262 treesize of output 239 [2022-11-25 16:54:54,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,556 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 230 treesize of output 223 [2022-11-25 16:54:54,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,646 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 48 treesize of output 37 [2022-11-25 16:54:54,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,664 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 598 treesize of output 546 [2022-11-25 16:54:54,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,683 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 534 treesize of output 511 [2022-11-25 16:54:54,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:54,703 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 502 treesize of output 447 [2022-11-25 16:54:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:55,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173749031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:55,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:55,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-11-25 16:54:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143480515] [2022-11-25 16:54:55,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 16:54:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 16:54:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=580, Unknown=10, NotChecked=0, Total=702 [2022-11-25 16:54:56,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 458 [2022-11-25 16:54:56,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 147 transitions, 1946 flow. Second operand has 27 states, 27 states have (on average 137.55555555555554) internal successors, (3714), 27 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:56,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:54:56,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 458 [2022-11-25 16:54:56,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:54:57,574 INFO L130 PetriNetUnfolder]: 534/957 cut-off events. [2022-11-25 16:54:57,574 INFO L131 PetriNetUnfolder]: For 6584/6584 co-relation queries the response was YES. [2022-11-25 16:54:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6056 conditions, 957 events. 534/957 cut-off events. For 6584/6584 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4610 event pairs, 86 based on Foata normal form. 2/959 useless extension candidates. Maximal degree in co-relation 5998. Up to 461 conditions per place. [2022-11-25 16:54:57,582 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 82 selfloop transitions, 108 changer transitions 0/190 dead transitions. [2022-11-25 16:54:57,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 190 transitions, 2665 flow [2022-11-25 16:54:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:54:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 16:54:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1972 transitions. [2022-11-25 16:54:57,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3075483468496569 [2022-11-25 16:54:57,587 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1972 transitions. [2022-11-25 16:54:57,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1972 transitions. [2022-11-25 16:54:57,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:54:57,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1972 transitions. [2022-11-25 16:54:57,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 140.85714285714286) internal successors, (1972), 14 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:57,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:57,604 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:57,604 INFO L175 Difference]: Start difference. First operand has 135 places, 147 transitions, 1946 flow. Second operand 14 states and 1972 transitions. [2022-11-25 16:54:57,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 190 transitions, 2665 flow [2022-11-25 16:54:57,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 190 transitions, 2628 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-11-25 16:54:57,643 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 2353 flow [2022-11-25 16:54:57,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2353, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2022-11-25 16:54:57,644 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2022-11-25 16:54:57,644 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 2353 flow [2022-11-25 16:54:57,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.55555555555554) internal successors, (3714), 27 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:57,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:54:57,645 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] [2022-11-25 16:54:57,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:57,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:57,851 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:54:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1074572393, now seen corresponding path program 1 times [2022-11-25 16:54:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:57,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975041209] [2022-11-25 16:54:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:54:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975041209] [2022-11-25 16:54:58,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975041209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032705761] [2022-11-25 16:54:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:58,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:58,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:58,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 16:54:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 16:54:58,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:54:58,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:58,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:58,929 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 161 treesize of output 125 [2022-11-25 16:54:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:54:59,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032705761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:59,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:59,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-25 16:54:59,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457740883] [2022-11-25 16:54:59,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:59,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 16:54:59,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 16:54:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:55:00,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 458 [2022-11-25 16:55:00,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 2353 flow. Second operand has 22 states, 22 states have (on average 186.04545454545453) internal successors, (4093), 22 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:00,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:55:00,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 458 [2022-11-25 16:55:00,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:55:02,082 INFO L130 PetriNetUnfolder]: 1711/2773 cut-off events. [2022-11-25 16:55:02,082 INFO L131 PetriNetUnfolder]: For 21525/21525 co-relation queries the response was YES. [2022-11-25 16:55:02,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20067 conditions, 2773 events. 1711/2773 cut-off events. For 21525/21525 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14891 event pairs, 315 based on Foata normal form. 48/2821 useless extension candidates. Maximal degree in co-relation 19936. Up to 693 conditions per place. [2022-11-25 16:55:02,115 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 430 selfloop transitions, 129 changer transitions 17/576 dead transitions. [2022-11-25 16:55:02,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 576 transitions, 9361 flow [2022-11-25 16:55:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:55:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 16:55:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3066 transitions. [2022-11-25 16:55:02,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183951965065502 [2022-11-25 16:55:02,119 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3066 transitions. [2022-11-25 16:55:02,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3066 transitions. [2022-11-25 16:55:02,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:55:02,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3066 transitions. [2022-11-25 16:55:02,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 191.625) internal successors, (3066), 16 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 458.0) internal successors, (7786), 17 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,132 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 458.0) internal successors, (7786), 17 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,132 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 2353 flow. Second operand 16 states and 3066 transitions. [2022-11-25 16:55:02,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 576 transitions, 9361 flow [2022-11-25 16:55:02,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 576 transitions, 9044 flow, removed 33 selfloop flow, removed 10 redundant places. [2022-11-25 16:55:02,331 INFO L231 Difference]: Finished difference. Result has 155 places, 269 transitions, 4241 flow [2022-11-25 16:55:02,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4241, PETRI_PLACES=155, PETRI_TRANSITIONS=269} [2022-11-25 16:55:02,331 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 130 predicate places. [2022-11-25 16:55:02,332 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 269 transitions, 4241 flow [2022-11-25 16:55:02,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 186.04545454545453) internal successors, (4093), 22 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:55:02,333 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] [2022-11-25 16:55:02,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:02,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 16:55:02,533 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:55:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:02,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1074038469, now seen corresponding path program 1 times [2022-11-25 16:55:02,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:02,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277678979] [2022-11-25 16:55:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:02,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:03,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277678979] [2022-11-25 16:55:03,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277678979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371569950] [2022-11-25 16:55:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:03,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:03,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:03,209 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:03,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 16:55:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:03,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 16:55:03,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:03,457 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 11 treesize of output 7 [2022-11-25 16:55:03,499 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 6 treesize of output 5 [2022-11-25 16:55:03,582 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 6 treesize of output 5 [2022-11-25 16:55:03,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:03,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 16:55:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:04,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:07,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:07,162 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 47 treesize of output 36 [2022-11-25 16:55:07,178 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:55:07,179 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 566 treesize of output 509 [2022-11-25 16:55:07,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:07,196 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 502 treesize of output 478 [2022-11-25 16:55:07,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:07,221 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 470 treesize of output 414 [2022-11-25 16:55:08,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:08,232 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 47 treesize of output 36 [2022-11-25 16:55:08,249 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:55:08,249 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 1142 treesize of output 1021 [2022-11-25 16:55:08,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:08,270 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 1014 treesize of output 958 [2022-11-25 16:55:08,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:08,292 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 950 treesize of output 830 [2022-11-25 16:55:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:11,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371569950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:11,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:11,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2022-11-25 16:55:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68004244] [2022-11-25 16:55:11,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:11,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 16:55:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 16:55:11,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1003, Unknown=29, NotChecked=0, Total=1260 [2022-11-25 16:55:13,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 458 [2022-11-25 16:55:13,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 269 transitions, 4241 flow. Second operand has 36 states, 36 states have (on average 127.55555555555556) internal successors, (4592), 36 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:13,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:55:13,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 458 [2022-11-25 16:55:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:55:16,359 INFO L130 PetriNetUnfolder]: 2330/3782 cut-off events. [2022-11-25 16:55:16,360 INFO L131 PetriNetUnfolder]: For 32603/32603 co-relation queries the response was YES. [2022-11-25 16:55:16,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28088 conditions, 3782 events. 2330/3782 cut-off events. For 32603/32603 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21499 event pairs, 356 based on Foata normal form. 9/3791 useless extension candidates. Maximal degree in co-relation 27959. Up to 1618 conditions per place. [2022-11-25 16:55:16,391 INFO L137 encePairwiseOnDemand]: 442/458 looper letters, 328 selfloop transitions, 129 changer transitions 14/471 dead transitions. [2022-11-25 16:55:16,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 471 transitions, 7574 flow [2022-11-25 16:55:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:55:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 16:55:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2649 transitions. [2022-11-25 16:55:16,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2891921397379913 [2022-11-25 16:55:16,395 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2649 transitions. [2022-11-25 16:55:16,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2649 transitions. [2022-11-25 16:55:16,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:55:16,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2649 transitions. [2022-11-25 16:55:16,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.45) internal successors, (2649), 20 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:16,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 458.0) internal successors, (9618), 21 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:16,406 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 458.0) internal successors, (9618), 21 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:16,406 INFO L175 Difference]: Start difference. First operand has 155 places, 269 transitions, 4241 flow. Second operand 20 states and 2649 transitions. [2022-11-25 16:55:16,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 471 transitions, 7574 flow [2022-11-25 16:55:16,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 471 transitions, 7331 flow, removed 47 selfloop flow, removed 2 redundant places. [2022-11-25 16:55:16,620 INFO L231 Difference]: Finished difference. Result has 180 places, 331 transitions, 5293 flow [2022-11-25 16:55:16,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5293, PETRI_PLACES=180, PETRI_TRANSITIONS=331} [2022-11-25 16:55:16,620 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 155 predicate places. [2022-11-25 16:55:16,620 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 331 transitions, 5293 flow [2022-11-25 16:55:16,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 127.55555555555556) internal successors, (4592), 36 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:16,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:55:16,621 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] [2022-11-25 16:55:16,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 16:55:16,822 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:55:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1749707117, now seen corresponding path program 2 times [2022-11-25 16:55:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:16,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564025572] [2022-11-25 16:55:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:16,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564025572] [2022-11-25 16:55:17,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564025572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139682650] [2022-11-25 16:55:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:55:17,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:17,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:17,804 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:17,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 16:55:18,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:55:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:18,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 16:55:18,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:18,516 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:55:18,516 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 81 treesize of output 45 [2022-11-25 16:55:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:55:18,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139682650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:18,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:55:18,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2022-11-25 16:55:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239707229] [2022-11-25 16:55:18,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:18,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:55:18,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:55:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:55:19,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:55:19,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 331 transitions, 5293 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:19,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:55:19,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:55:19,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:55:20,591 INFO L130 PetriNetUnfolder]: 2316/3770 cut-off events. [2022-11-25 16:55:20,591 INFO L131 PetriNetUnfolder]: For 37651/37651 co-relation queries the response was YES. [2022-11-25 16:55:20,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28788 conditions, 3770 events. 2316/3770 cut-off events. For 37651/37651 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21521 event pairs, 565 based on Foata normal form. 5/3775 useless extension candidates. Maximal degree in co-relation 28687. Up to 2432 conditions per place. [2022-11-25 16:55:20,620 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 314 selfloop transitions, 64 changer transitions 10/388 dead transitions. [2022-11-25 16:55:20,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 388 transitions, 6669 flow [2022-11-25 16:55:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:55:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:55:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1830 transitions. [2022-11-25 16:55:20,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39956331877729256 [2022-11-25 16:55:20,623 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1830 transitions. [2022-11-25 16:55:20,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1830 transitions. [2022-11-25 16:55:20,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:55:20,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1830 transitions. [2022-11-25 16:55:20,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 183.0) internal successors, (1830), 10 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:20,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:20,628 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:20,629 INFO L175 Difference]: Start difference. First operand has 180 places, 331 transitions, 5293 flow. Second operand 10 states and 1830 transitions. [2022-11-25 16:55:20,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 388 transitions, 6669 flow [2022-11-25 16:55:20,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 388 transitions, 6607 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-11-25 16:55:20,824 INFO L231 Difference]: Finished difference. Result has 184 places, 331 transitions, 5384 flow [2022-11-25 16:55:20,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5384, PETRI_PLACES=184, PETRI_TRANSITIONS=331} [2022-11-25 16:55:20,825 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 159 predicate places. [2022-11-25 16:55:20,825 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 331 transitions, 5384 flow [2022-11-25 16:55:20,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:20,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:55:20,826 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] [2022-11-25 16:55:20,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:21,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:21,027 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:55:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash -883696835, now seen corresponding path program 3 times [2022-11-25 16:55:21,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:21,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326914674] [2022-11-25 16:55:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:21,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:21,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326914674] [2022-11-25 16:55:21,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326914674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:21,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808268798] [2022-11-25 16:55:21,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:55:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:21,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:21,767 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:21,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 16:55:21,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 16:55:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:55:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:22,382 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:55:22,382 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 81 treesize of output 45 [2022-11-25 16:55:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:55:22,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:22,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808268798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:22,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:55:22,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 16:55:22,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141623156] [2022-11-25 16:55:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:22,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:55:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:22,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:55:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:55:23,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:55:23,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 331 transitions, 5384 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:23,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:55:23,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:55:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:55:24,461 INFO L130 PetriNetUnfolder]: 2312/3766 cut-off events. [2022-11-25 16:55:24,461 INFO L131 PetriNetUnfolder]: For 38377/38377 co-relation queries the response was YES. [2022-11-25 16:55:24,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29079 conditions, 3766 events. 2312/3766 cut-off events. For 38377/38377 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21454 event pairs, 592 based on Foata normal form. 5/3771 useless extension candidates. Maximal degree in co-relation 28976. Up to 2432 conditions per place. [2022-11-25 16:55:24,493 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 311 selfloop transitions, 60 changer transitions 17/388 dead transitions. [2022-11-25 16:55:24,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 388 transitions, 6744 flow [2022-11-25 16:55:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:55:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:55:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2006 transitions. [2022-11-25 16:55:24,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3981738785232235 [2022-11-25 16:55:24,496 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2006 transitions. [2022-11-25 16:55:24,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2006 transitions. [2022-11-25 16:55:24,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:55:24,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2006 transitions. [2022-11-25 16:55:24,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 182.36363636363637) internal successors, (2006), 11 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:24,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:24,503 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:24,503 INFO L175 Difference]: Start difference. First operand has 184 places, 331 transitions, 5384 flow. Second operand 11 states and 2006 transitions. [2022-11-25 16:55:24,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 388 transitions, 6744 flow [2022-11-25 16:55:24,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 388 transitions, 6624 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-11-25 16:55:24,795 INFO L231 Difference]: Finished difference. Result has 186 places, 325 transitions, 5299 flow [2022-11-25 16:55:24,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5299, PETRI_PLACES=186, PETRI_TRANSITIONS=325} [2022-11-25 16:55:24,796 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 161 predicate places. [2022-11-25 16:55:24,797 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 325 transitions, 5299 flow [2022-11-25 16:55:24,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:24,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:55:24,797 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] [2022-11-25 16:55:24,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:24,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:24,999 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:55:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1645355075, now seen corresponding path program 4 times [2022-11-25 16:55:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038264094] [2022-11-25 16:55:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:25,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038264094] [2022-11-25 16:55:25,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038264094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673912496] [2022-11-25 16:55:25,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:55:25,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:25,551 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:25,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 16:55:25,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:55:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:25,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 16:55:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:25,948 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-25 16:55:25,949 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 81 treesize of output 50 [2022-11-25 16:55:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:55:26,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:26,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673912496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:26,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:55:26,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-11-25 16:55:26,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877113882] [2022-11-25 16:55:26,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:26,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:55:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:26,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:55:26,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:55:26,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 458 [2022-11-25 16:55:26,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 325 transitions, 5299 flow. Second operand has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:26,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:55:26,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 458 [2022-11-25 16:55:26,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:55:27,592 INFO L130 PetriNetUnfolder]: 2329/3806 cut-off events. [2022-11-25 16:55:27,592 INFO L131 PetriNetUnfolder]: For 38988/38988 co-relation queries the response was YES. [2022-11-25 16:55:27,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29502 conditions, 3806 events. 2329/3806 cut-off events. For 38988/38988 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21836 event pairs, 548 based on Foata normal form. 2/3808 useless extension candidates. Maximal degree in co-relation 29391. Up to 2432 conditions per place. [2022-11-25 16:55:27,625 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 324 selfloop transitions, 68 changer transitions 5/397 dead transitions. [2022-11-25 16:55:27,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 397 transitions, 7035 flow [2022-11-25 16:55:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:55:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:55:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1664 transitions. [2022-11-25 16:55:27,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036875303250849 [2022-11-25 16:55:27,629 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1664 transitions. [2022-11-25 16:55:27,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1664 transitions. [2022-11-25 16:55:27,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:55:27,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1664 transitions. [2022-11-25 16:55:27,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.88888888888889) internal successors, (1664), 9 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:27,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:55:27,635 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:55:27,635 INFO L175 Difference]: Start difference. First operand has 186 places, 325 transitions, 5299 flow. Second operand 9 states and 1664 transitions. [2022-11-25 16:55:27,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 397 transitions, 7035 flow [2022-11-25 16:55:27,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 397 transitions, 6803 flow, removed 37 selfloop flow, removed 11 redundant places. [2022-11-25 16:55:27,864 INFO L231 Difference]: Finished difference. Result has 184 places, 342 transitions, 5705 flow [2022-11-25 16:55:27,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5133, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5705, PETRI_PLACES=184, PETRI_TRANSITIONS=342} [2022-11-25 16:55:27,864 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 159 predicate places. [2022-11-25 16:55:27,864 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 342 transitions, 5705 flow [2022-11-25 16:55:27,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:27,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:55:27,865 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] [2022-11-25 16:55:27,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 16:55:28,067 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:55:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:28,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2087456051, now seen corresponding path program 5 times [2022-11-25 16:55:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:28,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842629677] [2022-11-25 16:55:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:28,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:28,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842629677] [2022-11-25 16:55:28,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842629677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425461063] [2022-11-25 16:55:28,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:55:28,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:28,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:28,650 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:28,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 16:55:28,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:55:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:28,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 16:55:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:28,934 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 11 treesize of output 7 [2022-11-25 16:55:28,976 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 6 treesize of output 5 [2022-11-25 16:55:29,024 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 6 treesize of output 5 [2022-11-25 16:55:29,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:29,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 16:55:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:29,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:32,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:32,560 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 47 treesize of output 36 [2022-11-25 16:55:32,582 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:55:32,583 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 566 treesize of output 509 [2022-11-25 16:55:32,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:32,605 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 502 treesize of output 446 [2022-11-25 16:55:32,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:32,626 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 438 treesize of output 414 [2022-11-25 16:55:33,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:33,554 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 47 treesize of output 36 [2022-11-25 16:55:33,575 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:55:33,575 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 278 treesize of output 253 [2022-11-25 16:55:33,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:33,598 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 246 treesize of output 238 [2022-11-25 16:55:33,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:33,617 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 230 treesize of output 206 [2022-11-25 16:55:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:34,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425461063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:34,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:34,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2022-11-25 16:55:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492821674] [2022-11-25 16:55:34,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 16:55:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 16:55:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=962, Unknown=14, NotChecked=0, Total=1190 [2022-11-25 16:55:36,218 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] [2022-11-25 16:55:38,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:40,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:42,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:44,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:46,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:48,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:50,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:52,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:54,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:56,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:55:58,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:00,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:02,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:04,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:06,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:08,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:10,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:12,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:14,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:16,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:18,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:20,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:22,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:24,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:26,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:28,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:30,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:32,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:34,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:36,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:38,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:40,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:42,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:44,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:46,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:48,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:50,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:52,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:54,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:56,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:56:58,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:00,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:02,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:04,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:06,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:08,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:10,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:12,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:14,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:16,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:18,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:20,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:22,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:24,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:26,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:28,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:30,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:32,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:32,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 458 [2022-11-25 16:57:32,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 342 transitions, 5705 flow. Second operand has 35 states, 35 states have (on average 127.51428571428572) internal successors, (4463), 35 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:32,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:57:32,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 458 [2022-11-25 16:57:32,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:57:35,902 INFO L130 PetriNetUnfolder]: 2271/3747 cut-off events. [2022-11-25 16:57:35,902 INFO L131 PetriNetUnfolder]: For 39241/39241 co-relation queries the response was YES. [2022-11-25 16:57:35,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28912 conditions, 3747 events. 2271/3747 cut-off events. For 39241/39241 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21769 event pairs, 383 based on Foata normal form. 35/3782 useless extension candidates. Maximal degree in co-relation 28799. Up to 1618 conditions per place. [2022-11-25 16:57:35,934 INFO L137 encePairwiseOnDemand]: 442/458 looper letters, 288 selfloop transitions, 167 changer transitions 23/478 dead transitions. [2022-11-25 16:57:35,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 478 transitions, 8069 flow [2022-11-25 16:57:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 16:57:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 16:57:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2919 transitions. [2022-11-25 16:57:35,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28969829297340216 [2022-11-25 16:57:35,938 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2919 transitions. [2022-11-25 16:57:35,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2919 transitions. [2022-11-25 16:57:35,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:57:35,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2919 transitions. [2022-11-25 16:57:35,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.6818181818182) internal successors, (2919), 22 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:35,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:35,949 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:35,949 INFO L175 Difference]: Start difference. First operand has 184 places, 342 transitions, 5705 flow. Second operand 22 states and 2919 transitions. [2022-11-25 16:57:35,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 478 transitions, 8069 flow [2022-11-25 16:57:36,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 478 transitions, 7975 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-11-25 16:57:36,155 INFO L231 Difference]: Finished difference. Result has 205 places, 356 transitions, 6297 flow [2022-11-25 16:57:36,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5524, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6297, PETRI_PLACES=205, PETRI_TRANSITIONS=356} [2022-11-25 16:57:36,155 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2022-11-25 16:57:36,155 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 356 transitions, 6297 flow [2022-11-25 16:57:36,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 127.51428571428572) internal successors, (4463), 35 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:36,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:57:36,156 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] [2022-11-25 16:57:36,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:36,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 16:57:36,357 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:57:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2097565033, now seen corresponding path program 6 times [2022-11-25 16:57:36,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:36,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210419382] [2022-11-25 16:57:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:36,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210419382] [2022-11-25 16:57:36,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210419382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219510696] [2022-11-25 16:57:36,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:57:36,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:36,927 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:36,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 16:57:37,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 16:57:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:57:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:37,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:37,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 16:57:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:57:37,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:57:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219510696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:57:37,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:57:37,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 16:57:37,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988524876] [2022-11-25 16:57:37,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:57:37,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:57:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:57:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:57:38,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 16:57:38,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 356 transitions, 6297 flow. Second operand has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:38,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:57:38,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 16:57:38,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:57:39,856 INFO L130 PetriNetUnfolder]: 2228/3678 cut-off events. [2022-11-25 16:57:39,857 INFO L131 PetriNetUnfolder]: For 43134/43134 co-relation queries the response was YES. [2022-11-25 16:57:39,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29309 conditions, 3678 events. 2228/3678 cut-off events. For 43134/43134 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21335 event pairs, 571 based on Foata normal form. 1/3679 useless extension candidates. Maximal degree in co-relation 29191. Up to 2432 conditions per place. [2022-11-25 16:57:39,890 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 340 selfloop transitions, 47 changer transitions 17/404 dead transitions. [2022-11-25 16:57:39,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 404 transitions, 7542 flow [2022-11-25 16:57:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:57:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:57:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1988 transitions. [2022-11-25 16:57:39,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3946010321556173 [2022-11-25 16:57:39,893 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1988 transitions. [2022-11-25 16:57:39,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1988 transitions. [2022-11-25 16:57:39,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:57:39,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1988 transitions. [2022-11-25 16:57:39,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 180.72727272727272) internal successors, (1988), 11 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:39,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:39,898 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:39,898 INFO L175 Difference]: Start difference. First operand has 205 places, 356 transitions, 6297 flow. Second operand 11 states and 1988 transitions. [2022-11-25 16:57:39,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 404 transitions, 7542 flow [2022-11-25 16:57:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 404 transitions, 7329 flow, removed 24 selfloop flow, removed 13 redundant places. [2022-11-25 16:57:40,140 INFO L231 Difference]: Finished difference. Result has 203 places, 353 transitions, 6120 flow [2022-11-25 16:57:40,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6120, PETRI_PLACES=203, PETRI_TRANSITIONS=353} [2022-11-25 16:57:40,140 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 178 predicate places. [2022-11-25 16:57:40,141 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 353 transitions, 6120 flow [2022-11-25 16:57:40,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:40,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:57:40,141 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] [2022-11-25 16:57:40,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 16:57:40,342 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:57:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1791532167, now seen corresponding path program 7 times [2022-11-25 16:57:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044719236] [2022-11-25 16:57:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:40,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:41,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:41,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044719236] [2022-11-25 16:57:41,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044719236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:41,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368140172] [2022-11-25 16:57:41,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:57:41,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:41,204 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:41,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 16:57:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 16:57:41,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:41,461 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 11 treesize of output 7 [2022-11-25 16:57:41,505 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 6 treesize of output 5 [2022-11-25 16:57:41,554 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 6 treesize of output 5 [2022-11-25 16:57:41,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:41,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 16:57:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:42,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:44,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:44,971 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 47 treesize of output 36 [2022-11-25 16:57:44,988 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:57:44,989 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 566 treesize of output 509 [2022-11-25 16:57:45,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:45,007 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 502 treesize of output 478 [2022-11-25 16:57:45,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:45,027 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 470 treesize of output 414 [2022-11-25 16:57:45,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:45,996 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 47 treesize of output 36 [2022-11-25 16:57:46,011 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:57:46,012 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 278 treesize of output 253 [2022-11-25 16:57:46,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:46,026 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 246 treesize of output 238 [2022-11-25 16:57:46,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:46,057 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 230 treesize of output 206 [2022-11-25 16:57:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:46,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368140172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:46,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:57:46,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2022-11-25 16:57:46,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282056917] [2022-11-25 16:57:46,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:46,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 16:57:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:46,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 16:57:46,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1004, Unknown=14, NotChecked=0, Total=1190 [2022-11-25 16:57:48,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:51,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:53,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:55,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:57:57,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:00,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:02,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:04,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:07,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:09,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:12,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:14,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:16,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:18,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:58:20,629 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] [2022-11-25 16:58:20,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 458 [2022-11-25 16:58:20,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 353 transitions, 6120 flow. Second operand has 35 states, 35 states have (on average 127.51428571428572) internal successors, (4463), 35 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:20,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:20,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 458 [2022-11-25 16:58:20,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:24,782 INFO L130 PetriNetUnfolder]: 2354/3880 cut-off events. [2022-11-25 16:58:24,782 INFO L131 PetriNetUnfolder]: For 43735/43735 co-relation queries the response was YES. [2022-11-25 16:58:24,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30767 conditions, 3880 events. 2354/3880 cut-off events. For 43735/43735 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22658 event pairs, 491 based on Foata normal form. 5/3885 useless extension candidates. Maximal degree in co-relation 30678. Up to 2182 conditions per place. [2022-11-25 16:58:24,814 INFO L137 encePairwiseOnDemand]: 442/458 looper letters, 312 selfloop transitions, 122 changer transitions 66/500 dead transitions. [2022-11-25 16:58:24,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 500 transitions, 8685 flow [2022-11-25 16:58:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 16:58:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 16:58:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3809 transitions. [2022-11-25 16:58:24,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28677909953320285 [2022-11-25 16:58:24,818 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3809 transitions. [2022-11-25 16:58:24,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3809 transitions. [2022-11-25 16:58:24,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:24,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3809 transitions. [2022-11-25 16:58:24,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 131.3448275862069) internal successors, (3809), 29 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:24,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 458.0) internal successors, (13740), 30 states have internal predecessors, (13740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:24,829 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 458.0) internal successors, (13740), 30 states have internal predecessors, (13740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:24,829 INFO L175 Difference]: Start difference. First operand has 203 places, 353 transitions, 6120 flow. Second operand 29 states and 3809 transitions. [2022-11-25 16:58:24,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 500 transitions, 8685 flow [2022-11-25 16:58:25,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 500 transitions, 8553 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-11-25 16:58:25,069 INFO L231 Difference]: Finished difference. Result has 230 places, 354 transitions, 6372 flow [2022-11-25 16:58:25,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=6014, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6372, PETRI_PLACES=230, PETRI_TRANSITIONS=354} [2022-11-25 16:58:25,070 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 205 predicate places. [2022-11-25 16:58:25,070 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 354 transitions, 6372 flow [2022-11-25 16:58:25,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 127.51428571428572) internal successors, (4463), 35 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:25,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:25,071 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] [2022-11-25 16:58:25,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 16:58:25,272 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:58:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:25,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1725437677, now seen corresponding path program 8 times [2022-11-25 16:58:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231860431] [2022-11-25 16:58:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:25,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231860431] [2022-11-25 16:58:25,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231860431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842540073] [2022-11-25 16:58:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:58:25,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:25,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:25,963 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:25,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 16:58:26,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:58:26,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:58:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:26,568 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:58:26,568 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 81 treesize of output 45 [2022-11-25 16:58:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:58:26,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:58:26,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842540073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:26,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:58:26,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 16:58:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485441969] [2022-11-25 16:58:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:26,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:58:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:58:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:58:27,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:58:27,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 354 transitions, 6372 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:27,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:27,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:58:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:28,446 INFO L130 PetriNetUnfolder]: 2258/3712 cut-off events. [2022-11-25 16:58:28,446 INFO L131 PetriNetUnfolder]: For 47781/47781 co-relation queries the response was YES. [2022-11-25 16:58:28,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30532 conditions, 3712 events. 2258/3712 cut-off events. For 47781/47781 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21384 event pairs, 542 based on Foata normal form. 1/3713 useless extension candidates. Maximal degree in co-relation 30464. Up to 2450 conditions per place. [2022-11-25 16:58:28,488 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 316 selfloop transitions, 49 changer transitions 16/381 dead transitions. [2022-11-25 16:58:28,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 381 transitions, 7276 flow [2022-11-25 16:58:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:58:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:58:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1817 transitions. [2022-11-25 16:58:28,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3967248908296943 [2022-11-25 16:58:28,490 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1817 transitions. [2022-11-25 16:58:28,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1817 transitions. [2022-11-25 16:58:28,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:28,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1817 transitions. [2022-11-25 16:58:28,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.7) internal successors, (1817), 10 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:28,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:28,494 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:28,494 INFO L175 Difference]: Start difference. First operand has 230 places, 354 transitions, 6372 flow. Second operand 10 states and 1817 transitions. [2022-11-25 16:58:28,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 381 transitions, 7276 flow [2022-11-25 16:58:28,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 381 transitions, 6881 flow, removed 103 selfloop flow, removed 19 redundant places. [2022-11-25 16:58:28,816 INFO L231 Difference]: Finished difference. Result has 213 places, 347 transitions, 5982 flow [2022-11-25 16:58:28,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5989, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5982, PETRI_PLACES=213, PETRI_TRANSITIONS=347} [2022-11-25 16:58:28,817 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2022-11-25 16:58:28,817 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 347 transitions, 5982 flow [2022-11-25 16:58:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:28,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:28,818 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] [2022-11-25 16:58:28,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:29,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 16:58:29,018 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:58:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2096228853, now seen corresponding path program 9 times [2022-11-25 16:58:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526372101] [2022-11-25 16:58:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526372101] [2022-11-25 16:58:29,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526372101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:29,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325016136] [2022-11-25 16:58:29,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:58:29,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:29,681 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:29,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 16:58:29,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 16:58:29,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:58:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:30,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:30,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 16:58:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:58:30,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:58:30,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325016136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:30,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:58:30,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 16:58:30,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968646570] [2022-11-25 16:58:30,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:30,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:58:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:30,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:58:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:58:31,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:58:31,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 347 transitions, 5982 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:31,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:31,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:58:31,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:32,694 INFO L130 PetriNetUnfolder]: 2240/3668 cut-off events. [2022-11-25 16:58:32,694 INFO L131 PetriNetUnfolder]: For 48215/48215 co-relation queries the response was YES. [2022-11-25 16:58:32,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29711 conditions, 3668 events. 2240/3668 cut-off events. For 48215/48215 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20882 event pairs, 417 based on Foata normal form. 1/3669 useless extension candidates. Maximal degree in co-relation 29646. Up to 2448 conditions per place. [2022-11-25 16:58:32,727 INFO L137 encePairwiseOnDemand]: 449/458 looper letters, 236 selfloop transitions, 132 changer transitions 16/384 dead transitions. [2022-11-25 16:58:32,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 384 transitions, 7053 flow [2022-11-25 16:58:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:58:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:58:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1632 transitions. [2022-11-25 16:58:32,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39592430858806404 [2022-11-25 16:58:32,729 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1632 transitions. [2022-11-25 16:58:32,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1632 transitions. [2022-11-25 16:58:32,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:32,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1632 transitions. [2022-11-25 16:58:32,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 181.33333333333334) internal successors, (1632), 9 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:32,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:58:32,733 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:58:32,733 INFO L175 Difference]: Start difference. First operand has 213 places, 347 transitions, 5982 flow. Second operand 9 states and 1632 transitions. [2022-11-25 16:58:32,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 384 transitions, 7053 flow [2022-11-25 16:58:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 384 transitions, 6856 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-25 16:58:32,966 INFO L231 Difference]: Finished difference. Result has 207 places, 339 transitions, 5881 flow [2022-11-25 16:58:32,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5881, PETRI_PLACES=207, PETRI_TRANSITIONS=339} [2022-11-25 16:58:32,967 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 182 predicate places. [2022-11-25 16:58:32,967 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 339 transitions, 5881 flow [2022-11-25 16:58:32,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:32,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:32,968 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] [2022-11-25 16:58:32,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:33,168 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:58:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -570721575, now seen corresponding path program 10 times [2022-11-25 16:58:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734179812] [2022-11-25 16:58:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:33,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734179812] [2022-11-25 16:58:33,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734179812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51506601] [2022-11-25 16:58:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:58:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:33,717 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:33,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 16:58:33,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:58:33,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 16:58:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:34,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:34,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 79 [2022-11-25 16:58:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:58:34,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:58:34,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51506601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:34,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:58:34,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-11-25 16:58:34,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027193135] [2022-11-25 16:58:34,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:34,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:58:34,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:58:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:58:34,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 458 [2022-11-25 16:58:34,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 339 transitions, 5881 flow. Second operand has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:34,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:34,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 458 [2022-11-25 16:58:34,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:35,959 INFO L130 PetriNetUnfolder]: 2228/3648 cut-off events. [2022-11-25 16:58:35,959 INFO L131 PetriNetUnfolder]: For 48739/48739 co-relation queries the response was YES. [2022-11-25 16:58:35,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29752 conditions, 3648 events. 2228/3648 cut-off events. For 48739/48739 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20719 event pairs, 426 based on Foata normal form. 1/3649 useless extension candidates. Maximal degree in co-relation 29688. Up to 2448 conditions per place. [2022-11-25 16:58:36,000 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 246 selfloop transitions, 129 changer transitions 10/385 dead transitions. [2022-11-25 16:58:36,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 385 transitions, 7078 flow [2022-11-25 16:58:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:58:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:58:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1646 transitions. [2022-11-25 16:58:36,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3993207180980107 [2022-11-25 16:58:36,005 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1646 transitions. [2022-11-25 16:58:36,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1646 transitions. [2022-11-25 16:58:36,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:36,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1646 transitions. [2022-11-25 16:58:36,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.88888888888889) internal successors, (1646), 9 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:36,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:58:36,012 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:58:36,012 INFO L175 Difference]: Start difference. First operand has 207 places, 339 transitions, 5881 flow. Second operand 9 states and 1646 transitions. [2022-11-25 16:58:36,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 385 transitions, 7078 flow [2022-11-25 16:58:36,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 385 transitions, 6810 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-25 16:58:36,270 INFO L231 Difference]: Finished difference. Result has 207 places, 346 transitions, 6013 flow [2022-11-25 16:58:36,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6013, PETRI_PLACES=207, PETRI_TRANSITIONS=346} [2022-11-25 16:58:36,271 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 182 predicate places. [2022-11-25 16:58:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 346 transitions, 6013 flow [2022-11-25 16:58:36,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:36,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:36,272 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] [2022-11-25 16:58:36,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:36,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-25 16:58:36,472 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:58:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:36,473 INFO L85 PathProgramCache]: Analyzing trace with hash -260110657, now seen corresponding path program 11 times [2022-11-25 16:58:36,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:36,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302945029] [2022-11-25 16:58:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:36,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302945029] [2022-11-25 16:58:37,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302945029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912063158] [2022-11-25 16:58:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:58:37,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:37,023 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:37,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 16:58:37,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:58:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 16:58:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:37,326 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 11 treesize of output 7 [2022-11-25 16:58:37,385 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 6 treesize of output 5 [2022-11-25 16:58:37,442 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 6 treesize of output 5 [2022-11-25 16:58:37,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:37,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 16:58:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:37,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:38,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:38,855 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 47 treesize of output 36 [2022-11-25 16:58:38,869 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:58:38,869 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 278 treesize of output 253 [2022-11-25 16:58:38,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:38,882 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 246 treesize of output 222 [2022-11-25 16:58:38,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:38,896 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 214 treesize of output 206 [2022-11-25 16:58:39,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:39,333 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 47 treesize of output 36 [2022-11-25 16:58:39,353 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:58:39,353 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 566 treesize of output 509 [2022-11-25 16:58:39,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:39,371 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 502 treesize of output 446 [2022-11-25 16:58:39,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:39,390 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 438 treesize of output 414 [2022-11-25 16:58:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:40,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912063158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:40,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:40,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2022-11-25 16:58:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722887792] [2022-11-25 16:58:40,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 16:58:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 16:58:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=955, Unknown=10, NotChecked=0, Total=1122 [2022-11-25 16:58:44,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 458 [2022-11-25 16:58:44,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 346 transitions, 6013 flow. Second operand has 34 states, 34 states have (on average 127.52941176470588) internal successors, (4336), 34 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:44,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:44,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 458 [2022-11-25 16:58:44,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:46,707 INFO L130 PetriNetUnfolder]: 2350/3835 cut-off events. [2022-11-25 16:58:46,708 INFO L131 PetriNetUnfolder]: For 52791/52791 co-relation queries the response was YES. [2022-11-25 16:58:46,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31675 conditions, 3835 events. 2350/3835 cut-off events. For 52791/52791 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21971 event pairs, 420 based on Foata normal form. 2/3837 useless extension candidates. Maximal degree in co-relation 31610. Up to 2458 conditions per place. [2022-11-25 16:58:46,746 INFO L137 encePairwiseOnDemand]: 443/458 looper letters, 246 selfloop transitions, 168 changer transitions 28/442 dead transitions. [2022-11-25 16:58:46,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 442 transitions, 8041 flow [2022-11-25 16:58:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:58:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 16:58:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2751 transitions. [2022-11-25 16:58:46,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28602620087336245 [2022-11-25 16:58:46,751 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2751 transitions. [2022-11-25 16:58:46,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2751 transitions. [2022-11-25 16:58:46,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:46,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2751 transitions. [2022-11-25 16:58:46,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.0) internal successors, (2751), 21 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:46,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:46,760 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:46,761 INFO L175 Difference]: Start difference. First operand has 207 places, 346 transitions, 6013 flow. Second operand 21 states and 2751 transitions. [2022-11-25 16:58:46,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 442 transitions, 8041 flow [2022-11-25 16:58:47,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 442 transitions, 7779 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-25 16:58:47,042 INFO L231 Difference]: Finished difference. Result has 225 places, 365 transitions, 6569 flow [2022-11-25 16:58:47,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6569, PETRI_PLACES=225, PETRI_TRANSITIONS=365} [2022-11-25 16:58:47,043 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 200 predicate places. [2022-11-25 16:58:47,043 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 365 transitions, 6569 flow [2022-11-25 16:58:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 127.52941176470588) internal successors, (4336), 34 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:47,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:47,044 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] [2022-11-25 16:58:47,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:47,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:47,244 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:58:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1137692355, now seen corresponding path program 12 times [2022-11-25 16:58:47,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:47,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748972929] [2022-11-25 16:58:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:48,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748972929] [2022-11-25 16:58:48,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748972929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:48,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237206086] [2022-11-25 16:58:48,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:58:48,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:48,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:48,318 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:48,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 16:58:48,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 16:58:48,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:58:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:48,963 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:58:48,963 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 81 treesize of output 45 [2022-11-25 16:58:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:58:49,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:58:49,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237206086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:49,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:58:49,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2022-11-25 16:58:49,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364733352] [2022-11-25 16:58:49,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:49,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:58:49,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:58:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:58:49,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 16:58:49,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 365 transitions, 6569 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:49,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:49,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 16:58:49,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:50,777 INFO L130 PetriNetUnfolder]: 2261/3701 cut-off events. [2022-11-25 16:58:50,777 INFO L131 PetriNetUnfolder]: For 54975/54975 co-relation queries the response was YES. [2022-11-25 16:58:50,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31120 conditions, 3701 events. 2261/3701 cut-off events. For 54975/54975 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21132 event pairs, 436 based on Foata normal form. 21/3722 useless extension candidates. Maximal degree in co-relation 31051. Up to 2559 conditions per place. [2022-11-25 16:58:50,815 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 254 selfloop transitions, 118 changer transitions 16/388 dead transitions. [2022-11-25 16:58:50,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 388 transitions, 7414 flow [2022-11-25 16:58:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:58:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:58:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1810 transitions. [2022-11-25 16:58:50,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3951965065502183 [2022-11-25 16:58:50,818 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1810 transitions. [2022-11-25 16:58:50,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1810 transitions. [2022-11-25 16:58:50,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:50,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1810 transitions. [2022-11-25 16:58:50,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,825 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,825 INFO L175 Difference]: Start difference. First operand has 225 places, 365 transitions, 6569 flow. Second operand 10 states and 1810 transitions. [2022-11-25 16:58:50,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 388 transitions, 7414 flow [2022-11-25 16:58:51,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 388 transitions, 7148 flow, removed 112 selfloop flow, removed 11 redundant places. [2022-11-25 16:58:51,163 INFO L231 Difference]: Finished difference. Result has 218 places, 349 transitions, 6279 flow [2022-11-25 16:58:51,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6279, PETRI_PLACES=218, PETRI_TRANSITIONS=349} [2022-11-25 16:58:51,163 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 193 predicate places. [2022-11-25 16:58:51,164 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 349 transitions, 6279 flow [2022-11-25 16:58:51,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:51,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:51,164 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] [2022-11-25 16:58:51,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:51,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:51,365 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:58:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash -712949041, now seen corresponding path program 13 times [2022-11-25 16:58:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:51,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114462716] [2022-11-25 16:58:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:51,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:51,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114462716] [2022-11-25 16:58:51,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114462716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785158209] [2022-11-25 16:58:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:58:51,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:51,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:51,996 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:52,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 16:58:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 16:58:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:52,336 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 11 treesize of output 7 [2022-11-25 16:58:52,386 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 6 treesize of output 5 [2022-11-25 16:58:52,499 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 6 treesize of output 5 [2022-11-25 16:58:52,785 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:58:52,786 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 81 treesize of output 45 [2022-11-25 16:58:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:52,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:53,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785158209] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:53,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:58:53,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 11] total 28 [2022-11-25 16:58:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543171130] [2022-11-25 16:58:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:53,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:58:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:58:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=680, Unknown=18, NotChecked=0, Total=870 [2022-11-25 16:58:55,860 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] [2022-11-25 16:58:56,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 458 [2022-11-25 16:58:56,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 349 transitions, 6279 flow. Second operand has 12 states, 12 states have (on average 139.66666666666666) internal successors, (1676), 12 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:56,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 458 [2022-11-25 16:58:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:58,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:01,220 INFO L130 PetriNetUnfolder]: 2575/4175 cut-off events. [2022-11-25 16:59:01,220 INFO L131 PetriNetUnfolder]: For 68945/68945 co-relation queries the response was YES. [2022-11-25 16:59:01,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36176 conditions, 4175 events. 2575/4175 cut-off events. For 68945/68945 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24064 event pairs, 502 based on Foata normal form. 1/4176 useless extension candidates. Maximal degree in co-relation 36108. Up to 2205 conditions per place. [2022-11-25 16:59:01,262 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 295 selfloop transitions, 171 changer transitions 14/480 dead transitions. [2022-11-25 16:59:01,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 480 transitions, 9201 flow [2022-11-25 16:59:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:59:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 16:59:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2025 transitions. [2022-11-25 16:59:01,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31581409856519027 [2022-11-25 16:59:01,265 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2025 transitions. [2022-11-25 16:59:01,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2025 transitions. [2022-11-25 16:59:01,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:01,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2025 transitions. [2022-11-25 16:59:01,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 144.64285714285714) internal successors, (2025), 14 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:01,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:01,270 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:01,270 INFO L175 Difference]: Start difference. First operand has 218 places, 349 transitions, 6279 flow. Second operand 14 states and 2025 transitions. [2022-11-25 16:59:01,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 480 transitions, 9201 flow [2022-11-25 16:59:01,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 480 transitions, 8907 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-11-25 16:59:01,632 INFO L231 Difference]: Finished difference. Result has 220 places, 408 transitions, 7564 flow [2022-11-25 16:59:01,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7564, PETRI_PLACES=220, PETRI_TRANSITIONS=408} [2022-11-25 16:59:01,632 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 195 predicate places. [2022-11-25 16:59:01,632 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 408 transitions, 7564 flow [2022-11-25 16:59:01,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 139.66666666666666) internal successors, (1676), 12 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:01,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:01,633 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] [2022-11-25 16:59:01,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:01,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 16:59:01,833 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:59:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1952260101, now seen corresponding path program 14 times [2022-11-25 16:59:01,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:01,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110461379] [2022-11-25 16:59:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:01,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:02,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:02,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110461379] [2022-11-25 16:59:02,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110461379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:02,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330920023] [2022-11-25 16:59:02,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:59:02,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:02,894 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:02,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 16:59:03,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:59:03,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 16:59:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:03,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:59:03,308 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 18 treesize of output 20 [2022-11-25 16:59:03,807 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:59:03,807 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 81 treesize of output 45 [2022-11-25 16:59:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:59:03,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:59:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330920023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:03,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:03,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2022-11-25 16:59:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929962030] [2022-11-25 16:59:03,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:59:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:59:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:59:04,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 458 [2022-11-25 16:59:04,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 408 transitions, 7564 flow. Second operand has 13 states, 13 states have (on average 173.53846153846155) internal successors, (2256), 13 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:04,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:04,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 458 [2022-11-25 16:59:04,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:06,778 INFO L130 PetriNetUnfolder]: 2630/4297 cut-off events. [2022-11-25 16:59:06,778 INFO L131 PetriNetUnfolder]: For 70061/70061 co-relation queries the response was YES. [2022-11-25 16:59:06,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37781 conditions, 4297 events. 2630/4297 cut-off events. For 70061/70061 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25307 event pairs, 559 based on Foata normal form. 13/4310 useless extension candidates. Maximal degree in co-relation 37711. Up to 2505 conditions per place. [2022-11-25 16:59:06,822 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 370 selfloop transitions, 97 changer transitions 15/482 dead transitions. [2022-11-25 16:59:06,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 482 transitions, 9618 flow [2022-11-25 16:59:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:59:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:59:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2145 transitions. [2022-11-25 16:59:06,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3902838427947598 [2022-11-25 16:59:06,825 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2145 transitions. [2022-11-25 16:59:06,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2145 transitions. [2022-11-25 16:59:06,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:06,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2145 transitions. [2022-11-25 16:59:06,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 178.75) internal successors, (2145), 12 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:06,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:06,833 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:06,833 INFO L175 Difference]: Start difference. First operand has 220 places, 408 transitions, 7564 flow. Second operand 12 states and 2145 transitions. [2022-11-25 16:59:06,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 482 transitions, 9618 flow [2022-11-25 16:59:07,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 482 transitions, 9253 flow, removed 108 selfloop flow, removed 6 redundant places. [2022-11-25 16:59:07,223 INFO L231 Difference]: Finished difference. Result has 228 places, 419 transitions, 7780 flow [2022-11-25 16:59:07,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7303, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7780, PETRI_PLACES=228, PETRI_TRANSITIONS=419} [2022-11-25 16:59:07,224 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2022-11-25 16:59:07,224 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 419 transitions, 7780 flow [2022-11-25 16:59:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 173.53846153846155) internal successors, (2256), 13 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:07,225 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] [2022-11-25 16:59:07,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 16:59:07,426 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:59:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash -261577851, now seen corresponding path program 15 times [2022-11-25 16:59:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:07,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897878168] [2022-11-25 16:59:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:08,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897878168] [2022-11-25 16:59:08,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897878168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250592825] [2022-11-25 16:59:08,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:59:08,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:08,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:08,063 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:08,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 16:59:08,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 16:59:08,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 16:59:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:08,625 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:59:08,626 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 81 treesize of output 45 [2022-11-25 16:59:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:59:08,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:59:08,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250592825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:08,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:08,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2022-11-25 16:59:08,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870019468] [2022-11-25 16:59:08,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:08,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:59:08,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:59:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:59:09,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 458 [2022-11-25 16:59:09,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 419 transitions, 7780 flow. Second operand has 11 states, 11 states have (on average 178.8181818181818) internal successors, (1967), 11 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:09,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:09,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 458 [2022-11-25 16:59:09,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:10,519 INFO L130 PetriNetUnfolder]: 2615/4270 cut-off events. [2022-11-25 16:59:10,519 INFO L131 PetriNetUnfolder]: For 70066/70066 co-relation queries the response was YES. [2022-11-25 16:59:10,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37500 conditions, 4270 events. 2615/4270 cut-off events. For 70066/70066 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25026 event pairs, 582 based on Foata normal form. 1/4271 useless extension candidates. Maximal degree in co-relation 37427. Up to 2509 conditions per place. [2022-11-25 16:59:10,575 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 333 selfloop transitions, 106 changer transitions 9/448 dead transitions. [2022-11-25 16:59:10,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 448 transitions, 8969 flow [2022-11-25 16:59:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:59:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:59:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1657 transitions. [2022-11-25 16:59:10,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4019893255701116 [2022-11-25 16:59:10,578 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1657 transitions. [2022-11-25 16:59:10,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1657 transitions. [2022-11-25 16:59:10,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:10,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1657 transitions. [2022-11-25 16:59:10,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.11111111111111) internal successors, (1657), 9 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:59:10,582 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 16:59:10,582 INFO L175 Difference]: Start difference. First operand has 228 places, 419 transitions, 7780 flow. Second operand 9 states and 1657 transitions. [2022-11-25 16:59:10,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 448 transitions, 8969 flow [2022-11-25 16:59:11,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 448 transitions, 8808 flow, removed 11 selfloop flow, removed 10 redundant places. [2022-11-25 16:59:11,044 INFO L231 Difference]: Finished difference. Result has 225 places, 419 transitions, 7858 flow [2022-11-25 16:59:11,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7623, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7858, PETRI_PLACES=225, PETRI_TRANSITIONS=419} [2022-11-25 16:59:11,045 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 200 predicate places. [2022-11-25 16:59:11,045 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 419 transitions, 7858 flow [2022-11-25 16:59:11,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 178.8181818181818) internal successors, (1967), 11 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:11,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:11,046 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] [2022-11-25 16:59:11,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:11,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-25 16:59:11,252 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:59:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:11,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1028237147, now seen corresponding path program 16 times [2022-11-25 16:59:11,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:11,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140077784] [2022-11-25 16:59:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:11,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:12,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140077784] [2022-11-25 16:59:12,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140077784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941554381] [2022-11-25 16:59:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:59:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:12,047 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:12,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 16:59:12,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:59:12,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 16:59:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:12,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:59:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:59:12,583 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 16:59:12,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2022-11-25 16:59:12,875 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-25 16:59:12,875 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 81 treesize of output 50 [2022-11-25 16:59:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:59:12,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:59:12,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941554381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:12,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:12,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 23 [2022-11-25 16:59:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704904203] [2022-11-25 16:59:12,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:12,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:59:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:59:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-25 16:59:14,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 458 [2022-11-25 16:59:14,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 419 transitions, 7858 flow. Second operand has 13 states, 13 states have (on average 172.53846153846155) internal successors, (2243), 13 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:14,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:14,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 458 [2022-11-25 16:59:14,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:15,919 INFO L130 PetriNetUnfolder]: 2595/4231 cut-off events. [2022-11-25 16:59:15,919 INFO L131 PetriNetUnfolder]: For 68993/68993 co-relation queries the response was YES. [2022-11-25 16:59:15,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37195 conditions, 4231 events. 2595/4231 cut-off events. For 68993/68993 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24743 event pairs, 527 based on Foata normal form. 9/4240 useless extension candidates. Maximal degree in co-relation 37123. Up to 2509 conditions per place. [2022-11-25 16:59:15,969 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 339 selfloop transitions, 111 changer transitions 20/470 dead transitions. [2022-11-25 16:59:15,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 470 transitions, 9480 flow [2022-11-25 16:59:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:59:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:59:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1782 transitions. [2022-11-25 16:59:15,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3890829694323144 [2022-11-25 16:59:15,972 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1782 transitions. [2022-11-25 16:59:15,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1782 transitions. [2022-11-25 16:59:15,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:15,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1782 transitions. [2022-11-25 16:59:15,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.2) internal successors, (1782), 10 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:15,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:15,979 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:15,979 INFO L175 Difference]: Start difference. First operand has 225 places, 419 transitions, 7858 flow. Second operand 10 states and 1782 transitions. [2022-11-25 16:59:15,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 470 transitions, 9480 flow [2022-11-25 16:59:16,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 470 transitions, 9252 flow, removed 6 selfloop flow, removed 8 redundant places. [2022-11-25 16:59:16,431 INFO L231 Difference]: Finished difference. Result has 228 places, 412 transitions, 7796 flow [2022-11-25 16:59:16,432 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7607, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7796, PETRI_PLACES=228, PETRI_TRANSITIONS=412} [2022-11-25 16:59:16,432 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2022-11-25 16:59:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 412 transitions, 7796 flow [2022-11-25 16:59:16,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 172.53846153846155) internal successors, (2243), 13 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:16,433 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] [2022-11-25 16:59:16,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 16:59:16,633 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:59:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash -162226865, now seen corresponding path program 17 times [2022-11-25 16:59:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:16,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983903466] [2022-11-25 16:59:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:17,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983903466] [2022-11-25 16:59:17,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983903466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:17,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933568887] [2022-11-25 16:59:17,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:59:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:17,379 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:17,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 16:59:17,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:59:17,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 16:59:17,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:17,759 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 11 treesize of output 7 [2022-11-25 16:59:17,829 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 6 treesize of output 5 [2022-11-25 16:59:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:59:18,049 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 18 treesize of output 20 [2022-11-25 16:59:18,251 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:59:18,251 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 81 treesize of output 45 [2022-11-25 16:59:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:22,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:59:22,202 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 93 treesize of output 57 [2022-11-25 16:59:22,215 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:59:22,215 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 868 treesize of output 756 [2022-11-25 16:59:22,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:59:22,235 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 756 treesize of output 708 [2022-11-25 16:59:22,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:59:22,258 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 700 treesize of output 628 [2022-11-25 16:59:22,877 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 16:59:22,877 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 139 treesize of output 1 [2022-11-25 16:59:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:29,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933568887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:29,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:29,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-11-25 16:59:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087044895] [2022-11-25 16:59:29,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 16:59:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 16:59:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=832, Unknown=30, NotChecked=0, Total=992 [2022-11-25 16:59:31,557 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] [2022-11-25 16:59:34,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:36,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:39,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:41,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:44,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:46,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:48,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:50,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:52,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:56,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:59:58,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:00:01,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:00:01,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 458 [2022-11-25 17:00:01,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 412 transitions, 7796 flow. Second operand has 32 states, 32 states have (on average 131.6875) internal successors, (4214), 32 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:01,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:01,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 458 [2022-11-25 17:00:01,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:04,707 INFO L130 PetriNetUnfolder]: 2584/4226 cut-off events. [2022-11-25 17:00:04,707 INFO L131 PetriNetUnfolder]: For 70879/70879 co-relation queries the response was YES. [2022-11-25 17:00:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37194 conditions, 4226 events. 2584/4226 cut-off events. For 70879/70879 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24780 event pairs, 606 based on Foata normal form. 1/4227 useless extension candidates. Maximal degree in co-relation 37121. Up to 2497 conditions per place. [2022-11-25 17:00:04,752 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 320 selfloop transitions, 123 changer transitions 9/452 dead transitions. [2022-11-25 17:00:04,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 452 transitions, 9093 flow [2022-11-25 17:00:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:00:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:00:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1759 transitions. [2022-11-25 17:00:04,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29543164259321464 [2022-11-25 17:00:04,755 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1759 transitions. [2022-11-25 17:00:04,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1759 transitions. [2022-11-25 17:00:04,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:04,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1759 transitions. [2022-11-25 17:00:04,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 135.30769230769232) internal successors, (1759), 13 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:04,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:04,763 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:04,764 INFO L175 Difference]: Start difference. First operand has 228 places, 412 transitions, 7796 flow. Second operand 13 states and 1759 transitions. [2022-11-25 17:00:04,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 452 transitions, 9093 flow [2022-11-25 17:00:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 452 transitions, 9005 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-25 17:00:05,192 INFO L231 Difference]: Finished difference. Result has 231 places, 416 transitions, 8035 flow [2022-11-25 17:00:05,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8035, PETRI_PLACES=231, PETRI_TRANSITIONS=416} [2022-11-25 17:00:05,193 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 206 predicate places. [2022-11-25 17:00:05,194 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 416 transitions, 8035 flow [2022-11-25 17:00:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 131.6875) internal successors, (4214), 32 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:05,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:05,194 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] [2022-11-25 17:00:05,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:05,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 17:00:05,395 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:00:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash 399929305, now seen corresponding path program 18 times [2022-11-25 17:00:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:05,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316562523] [2022-11-25 17:00:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:05,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:06,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:06,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316562523] [2022-11-25 17:00:06,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316562523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977265332] [2022-11-25 17:00:06,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:00:06,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:06,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:06,331 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:06,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 17:00:06,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 17:00:06,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 17:00:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:06,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:06,944 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 18 treesize of output 20 [2022-11-25 17:00:07,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:07,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 71 [2022-11-25 17:00:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:00:07,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:07,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977265332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:07,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:07,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2022-11-25 17:00:07,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136213418] [2022-11-25 17:00:07,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:07,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:00:07,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:00:07,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:00:08,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:00:08,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 416 transitions, 8035 flow. Second operand has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:08,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:08,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:00:08,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:10,312 INFO L130 PetriNetUnfolder]: 2581/4217 cut-off events. [2022-11-25 17:00:10,312 INFO L131 PetriNetUnfolder]: For 71696/71696 co-relation queries the response was YES. [2022-11-25 17:00:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37478 conditions, 4217 events. 2581/4217 cut-off events. For 71696/71696 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24681 event pairs, 565 based on Foata normal form. 1/4218 useless extension candidates. Maximal degree in co-relation 37408. Up to 2509 conditions per place. [2022-11-25 17:00:10,359 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 317 selfloop transitions, 115 changer transitions 14/446 dead transitions. [2022-11-25 17:00:10,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 446 transitions, 9253 flow [2022-11-25 17:00:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:00:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:00:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1627 transitions. [2022-11-25 17:00:10,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39471130519165454 [2022-11-25 17:00:10,362 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1627 transitions. [2022-11-25 17:00:10,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1627 transitions. [2022-11-25 17:00:10,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:10,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1627 transitions. [2022-11-25 17:00:10,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.77777777777777) internal successors, (1627), 9 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:10,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 17:00:10,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 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) [2022-11-25 17:00:10,366 INFO L175 Difference]: Start difference. First operand has 231 places, 416 transitions, 8035 flow. Second operand 9 states and 1627 transitions. [2022-11-25 17:00:10,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 446 transitions, 9253 flow [2022-11-25 17:00:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 446 transitions, 8871 flow, removed 12 selfloop flow, removed 12 redundant places. [2022-11-25 17:00:10,853 INFO L231 Difference]: Finished difference. Result has 227 places, 411 transitions, 7776 flow [2022-11-25 17:00:10,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7776, PETRI_PLACES=227, PETRI_TRANSITIONS=411} [2022-11-25 17:00:10,853 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 202 predicate places. [2022-11-25 17:00:10,854 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 411 transitions, 7776 flow [2022-11-25 17:00:10,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:10,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:10,854 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] [2022-11-25 17:00:10,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:11,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 17:00:11,060 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:00:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash -323505041, now seen corresponding path program 2 times [2022-11-25 17:00:11,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377237676] [2022-11-25 17:00:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:11,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377237676] [2022-11-25 17:00:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377237676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743955773] [2022-11-25 17:00:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:11,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:11,398 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:11,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 17:00:11,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:00:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:00:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:12,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:12,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:12,222 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 161 treesize of output 125 [2022-11-25 17:00:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:13,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743955773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:13,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:13,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:00:13,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631903741] [2022-11-25 17:00:13,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:13,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:00:13,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:00:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:00:16,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:00:16,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 411 transitions, 7776 flow. Second operand has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:16,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:16,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:00:16,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:21,836 INFO L130 PetriNetUnfolder]: 4464/7701 cut-off events. [2022-11-25 17:00:21,836 INFO L131 PetriNetUnfolder]: For 129478/129478 co-relation queries the response was YES. [2022-11-25 17:00:21,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64489 conditions, 7701 events. 4464/7701 cut-off events. For 129478/129478 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 53448 event pairs, 720 based on Foata normal form. 93/7794 useless extension candidates. Maximal degree in co-relation 64421. Up to 2142 conditions per place. [2022-11-25 17:00:21,928 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 764 selfloop transitions, 395 changer transitions 34/1193 dead transitions. [2022-11-25 17:00:21,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1193 transitions, 23563 flow [2022-11-25 17:00:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:00:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:00:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6155 transitions. [2022-11-25 17:00:21,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3952607243770871 [2022-11-25 17:00:21,934 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6155 transitions. [2022-11-25 17:00:21,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6155 transitions. [2022-11-25 17:00:21,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:21,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6155 transitions. [2022-11-25 17:00:21,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 181.02941176470588) internal successors, (6155), 34 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,956 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,957 INFO L175 Difference]: Start difference. First operand has 227 places, 411 transitions, 7776 flow. Second operand 34 states and 6155 transitions. [2022-11-25 17:00:21,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1193 transitions, 23563 flow [2022-11-25 17:00:23,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1193 transitions, 22887 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-11-25 17:00:23,259 INFO L231 Difference]: Finished difference. Result has 259 places, 585 transitions, 12082 flow [2022-11-25 17:00:23,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7527, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12082, PETRI_PLACES=259, PETRI_TRANSITIONS=585} [2022-11-25 17:00:23,260 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 234 predicate places. [2022-11-25 17:00:23,260 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 585 transitions, 12082 flow [2022-11-25 17:00:23,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:23,261 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:23,261 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] [2022-11-25 17:00:23,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:23,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-25 17:00:23,468 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:00:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -653395797, now seen corresponding path program 3 times [2022-11-25 17:00:23,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69941035] [2022-11-25 17:00:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:23,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69941035] [2022-11-25 17:00:23,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69941035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669618023] [2022-11-25 17:00:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:00:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:23,872 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:23,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 17:00:24,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:00:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:00:24,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:24,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:24,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:24,698 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 161 treesize of output 125 [2022-11-25 17:00:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669618023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:25,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:25,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-25 17:00:25,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564244359] [2022-11-25 17:00:25,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:25,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:00:25,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:25,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:00:25,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:00:28,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:00:28,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 585 transitions, 12082 flow. Second operand has 32 states, 32 states have (on average 175.96875) internal successors, (5631), 32 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:28,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:28,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:00:28,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:33,183 INFO L130 PetriNetUnfolder]: 4375/7680 cut-off events. [2022-11-25 17:00:33,183 INFO L131 PetriNetUnfolder]: For 149696/149696 co-relation queries the response was YES. [2022-11-25 17:00:33,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66546 conditions, 7680 events. 4375/7680 cut-off events. For 149696/149696 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54476 event pairs, 480 based on Foata normal form. 225/7905 useless extension candidates. Maximal degree in co-relation 66466. Up to 1625 conditions per place. [2022-11-25 17:00:33,282 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 638 selfloop transitions, 394 changer transitions 37/1069 dead transitions. [2022-11-25 17:00:33,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1069 transitions, 22268 flow [2022-11-25 17:00:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:00:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:00:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4724 transitions. [2022-11-25 17:00:33,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39670809539805174 [2022-11-25 17:00:33,287 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4724 transitions. [2022-11-25 17:00:33,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4724 transitions. [2022-11-25 17:00:33,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:33,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4724 transitions. [2022-11-25 17:00:33,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 181.69230769230768) internal successors, (4724), 26 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 458.0) internal successors, (12366), 27 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,298 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 458.0) internal successors, (12366), 27 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,298 INFO L175 Difference]: Start difference. First operand has 259 places, 585 transitions, 12082 flow. Second operand 26 states and 4724 transitions. [2022-11-25 17:00:33,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1069 transitions, 22268 flow [2022-11-25 17:00:34,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1069 transitions, 21922 flow, removed 159 selfloop flow, removed 11 redundant places. [2022-11-25 17:00:34,638 INFO L231 Difference]: Finished difference. Result has 280 places, 660 transitions, 14916 flow [2022-11-25 17:00:34,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=11314, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14916, PETRI_PLACES=280, PETRI_TRANSITIONS=660} [2022-11-25 17:00:34,639 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 255 predicate places. [2022-11-25 17:00:34,639 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 660 transitions, 14916 flow [2022-11-25 17:00:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 175.96875) internal successors, (5631), 32 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:34,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:34,641 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] [2022-11-25 17:00:34,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-25 17:00:34,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:34,842 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:00:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1205499995, now seen corresponding path program 4 times [2022-11-25 17:00:34,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502035238] [2022-11-25 17:00:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:34,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:35,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:35,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502035238] [2022-11-25 17:00:35,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502035238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:35,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627875380] [2022-11-25 17:00:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:00:35,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:35,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:35,211 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:35,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 17:00:35,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:00:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:00:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:36,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:36,115 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 161 treesize of output 125 [2022-11-25 17:00:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627875380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:36,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:36,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-25 17:00:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313819923] [2022-11-25 17:00:36,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:00:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:00:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:00:39,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 17:00:39,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 660 transitions, 14916 flow. Second operand has 32 states, 32 states have (on average 176.96875) internal successors, (5663), 32 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:39,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:39,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 17:00:39,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:43,163 INFO L130 PetriNetUnfolder]: 4333/7635 cut-off events. [2022-11-25 17:00:43,163 INFO L131 PetriNetUnfolder]: For 169955/169955 co-relation queries the response was YES. [2022-11-25 17:00:43,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69281 conditions, 7635 events. 4333/7635 cut-off events. For 169955/169955 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54555 event pairs, 648 based on Foata normal form. 3/7638 useless extension candidates. Maximal degree in co-relation 69194. Up to 1995 conditions per place. [2022-11-25 17:00:43,286 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 652 selfloop transitions, 297 changer transitions 31/980 dead transitions. [2022-11-25 17:00:43,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 980 transitions, 21923 flow [2022-11-25 17:00:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:00:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:00:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3999 transitions. [2022-11-25 17:00:43,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3968836840015879 [2022-11-25 17:00:43,292 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3999 transitions. [2022-11-25 17:00:43,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3999 transitions. [2022-11-25 17:00:43,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:43,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3999 transitions. [2022-11-25 17:00:43,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.77272727272728) internal successors, (3999), 22 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:43,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:43,300 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:43,300 INFO L175 Difference]: Start difference. First operand has 280 places, 660 transitions, 14916 flow. Second operand 22 states and 3999 transitions. [2022-11-25 17:00:43,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 980 transitions, 21923 flow [2022-11-25 17:00:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 980 transitions, 20826 flow, removed 269 selfloop flow, removed 16 redundant places. [2022-11-25 17:00:44,943 INFO L231 Difference]: Finished difference. Result has 289 places, 659 transitions, 14508 flow [2022-11-25 17:00:44,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=13853, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14508, PETRI_PLACES=289, PETRI_TRANSITIONS=659} [2022-11-25 17:00:44,944 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 264 predicate places. [2022-11-25 17:00:44,944 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 659 transitions, 14508 flow [2022-11-25 17:00:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 176.96875) internal successors, (5663), 32 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:44,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:44,945 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] [2022-11-25 17:00:44,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:45,146 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:00:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash -225377369, now seen corresponding path program 5 times [2022-11-25 17:00:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:45,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178897757] [2022-11-25 17:00:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:45,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:45,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178897757] [2022-11-25 17:00:45,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178897757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302202992] [2022-11-25 17:00:45,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:00:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:45,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:45,554 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:45,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 17:00:45,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:00:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:00:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:46,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:46,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:46,516 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 161 treesize of output 125 [2022-11-25 17:00:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:47,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302202992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:47,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:47,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:00:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291412488] [2022-11-25 17:00:47,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:00:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:00:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:00:50,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 17:00:50,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 659 transitions, 14508 flow. Second operand has 35 states, 35 states have (on average 176.8) internal successors, (6188), 35 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:50,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:50,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 17:00:50,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:56,210 INFO L130 PetriNetUnfolder]: 4304/7554 cut-off events. [2022-11-25 17:00:56,210 INFO L131 PetriNetUnfolder]: For 158947/158947 co-relation queries the response was YES. [2022-11-25 17:00:56,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66535 conditions, 7554 events. 4304/7554 cut-off events. For 158947/158947 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 53666 event pairs, 740 based on Foata normal form. 3/7557 useless extension candidates. Maximal degree in co-relation 66444. Up to 2034 conditions per place. [2022-11-25 17:00:56,326 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 760 selfloop transitions, 401 changer transitions 18/1179 dead transitions. [2022-11-25 17:00:56,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1179 transitions, 25133 flow [2022-11-25 17:00:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:00:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 17:00:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5996 transitions. [2022-11-25 17:00:56,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3967182744475321 [2022-11-25 17:00:56,333 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5996 transitions. [2022-11-25 17:00:56,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5996 transitions. [2022-11-25 17:00:56,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:56,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5996 transitions. [2022-11-25 17:00:56,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 181.6969696969697) internal successors, (5996), 33 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 458.0) internal successors, (15572), 34 states have internal predecessors, (15572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,353 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 458.0) internal successors, (15572), 34 states have internal predecessors, (15572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,353 INFO L175 Difference]: Start difference. First operand has 289 places, 659 transitions, 14508 flow. Second operand 33 states and 5996 transitions. [2022-11-25 17:00:56,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1179 transitions, 25133 flow [2022-11-25 17:00:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1179 transitions, 24630 flow, removed 37 selfloop flow, removed 16 redundant places. [2022-11-25 17:00:57,851 INFO L231 Difference]: Finished difference. Result has 303 places, 659 transitions, 14854 flow [2022-11-25 17:00:57,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=14029, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14854, PETRI_PLACES=303, PETRI_TRANSITIONS=659} [2022-11-25 17:00:57,851 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 278 predicate places. [2022-11-25 17:00:57,851 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 659 transitions, 14854 flow [2022-11-25 17:00:57,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 176.8) internal successors, (6188), 35 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:57,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:57,852 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] [2022-11-25 17:00:57,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:58,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-25 17:00:58,053 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:00:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1316746717, now seen corresponding path program 6 times [2022-11-25 17:00:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:58,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847389014] [2022-11-25 17:00:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:58,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:58,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847389014] [2022-11-25 17:00:58,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847389014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:58,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575070152] [2022-11-25 17:00:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:00:58,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:58,366 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:58,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 17:00:58,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:00:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:00:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:58,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:59,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:59,061 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 161 treesize of output 125 [2022-11-25 17:00:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:59,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575070152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:59,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:59,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2022-11-25 17:00:59,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517754541] [2022-11-25 17:00:59,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:59,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:00:59,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:59,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:00:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:01:02,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 458 [2022-11-25 17:01:02,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 659 transitions, 14854 flow. Second operand has 30 states, 30 states have (on average 174.1) internal successors, (5223), 30 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:02,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:02,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 458 [2022-11-25 17:01:02,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:06,648 INFO L130 PetriNetUnfolder]: 4041/7161 cut-off events. [2022-11-25 17:01:06,648 INFO L131 PetriNetUnfolder]: For 152186/152186 co-relation queries the response was YES. [2022-11-25 17:01:06,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64186 conditions, 7161 events. 4041/7161 cut-off events. For 152186/152186 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 51022 event pairs, 836 based on Foata normal form. 37/7198 useless extension candidates. Maximal degree in co-relation 64096. Up to 2668 conditions per place. [2022-11-25 17:01:06,778 INFO L137 encePairwiseOnDemand]: 444/458 looper letters, 600 selfloop transitions, 342 changer transitions 42/984 dead transitions. [2022-11-25 17:01:06,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 984 transitions, 21387 flow [2022-11-25 17:01:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:01:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:01:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6062 transitions. [2022-11-25 17:01:06,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38928846647829435 [2022-11-25 17:01:06,787 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6062 transitions. [2022-11-25 17:01:06,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6062 transitions. [2022-11-25 17:01:06,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:06,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6062 transitions. [2022-11-25 17:01:06,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 178.2941176470588) internal successors, (6062), 34 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:06,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:06,807 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:06,807 INFO L175 Difference]: Start difference. First operand has 303 places, 659 transitions, 14854 flow. Second operand 34 states and 6062 transitions. [2022-11-25 17:01:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 984 transitions, 21387 flow [2022-11-25 17:01:08,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 984 transitions, 20867 flow, removed 27 selfloop flow, removed 25 redundant places. [2022-11-25 17:01:08,385 INFO L231 Difference]: Finished difference. Result has 320 places, 676 transitions, 15666 flow [2022-11-25 17:01:08,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=13539, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15666, PETRI_PLACES=320, PETRI_TRANSITIONS=676} [2022-11-25 17:01:08,386 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2022-11-25 17:01:08,386 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 676 transitions, 15666 flow [2022-11-25 17:01:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.1) internal successors, (5223), 30 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:08,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:08,387 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] [2022-11-25 17:01:08,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-25 17:01:08,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-25 17:01:08,588 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:01:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 790566199, now seen corresponding path program 7 times [2022-11-25 17:01:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:08,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082903858] [2022-11-25 17:01:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:08,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:08,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:08,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082903858] [2022-11-25 17:01:08,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082903858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:08,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983044608] [2022-11-25 17:01:08,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:01:08,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:08,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:08,987 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:08,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 17:01:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:01:09,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:09,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:09,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:09,928 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 161 treesize of output 125 [2022-11-25 17:01:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:10,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983044608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:10,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:10,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:01:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881818541] [2022-11-25 17:01:10,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:01:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:01:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:01:14,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:01:14,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 676 transitions, 15666 flow. Second operand has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:14,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:14,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:01:14,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:18,871 INFO L130 PetriNetUnfolder]: 4005/7071 cut-off events. [2022-11-25 17:01:18,871 INFO L131 PetriNetUnfolder]: For 155819/155819 co-relation queries the response was YES. [2022-11-25 17:01:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65732 conditions, 7071 events. 4005/7071 cut-off events. For 155819/155819 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 49941 event pairs, 762 based on Foata normal form. 2/7073 useless extension candidates. Maximal degree in co-relation 65633. Up to 2034 conditions per place. [2022-11-25 17:01:18,972 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 696 selfloop transitions, 331 changer transitions 35/1062 dead transitions. [2022-11-25 17:01:18,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1062 transitions, 23860 flow [2022-11-25 17:01:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:01:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 17:01:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5240 transitions. [2022-11-25 17:01:18,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.394518897756362 [2022-11-25 17:01:18,980 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5240 transitions. [2022-11-25 17:01:18,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5240 transitions. [2022-11-25 17:01:18,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:18,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5240 transitions. [2022-11-25 17:01:18,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 180.68965517241378) internal successors, (5240), 29 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:18,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 458.0) internal successors, (13740), 30 states have internal predecessors, (13740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:18,997 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 458.0) internal successors, (13740), 30 states have internal predecessors, (13740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:18,998 INFO L175 Difference]: Start difference. First operand has 320 places, 676 transitions, 15666 flow. Second operand 29 states and 5240 transitions. [2022-11-25 17:01:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1062 transitions, 23860 flow [2022-11-25 17:01:20,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1062 transitions, 23340 flow, removed 83 selfloop flow, removed 25 redundant places. [2022-11-25 17:01:20,571 INFO L231 Difference]: Finished difference. Result has 318 places, 668 transitions, 15662 flow [2022-11-25 17:01:20,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=15174, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15662, PETRI_PLACES=318, PETRI_TRANSITIONS=668} [2022-11-25 17:01:20,572 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 293 predicate places. [2022-11-25 17:01:20,572 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 668 transitions, 15662 flow [2022-11-25 17:01:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:20,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:20,573 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] [2022-11-25 17:01:20,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:20,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:20,774 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:01:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2008986393, now seen corresponding path program 8 times [2022-11-25 17:01:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:20,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588984229] [2022-11-25 17:01:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:21,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588984229] [2022-11-25 17:01:21,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588984229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:21,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381046479] [2022-11-25 17:01:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:21,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:21,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:21,163 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:21,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 17:01:21,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:01:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:21,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:22,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:22,069 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 161 treesize of output 125 [2022-11-25 17:01:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:23,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381046479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:23,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:23,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:01:23,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522935755] [2022-11-25 17:01:23,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:01:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:01:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:01:26,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:01:26,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 668 transitions, 15662 flow. Second operand has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:26,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:26,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:01:26,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:32,183 INFO L130 PetriNetUnfolder]: 3929/7040 cut-off events. [2022-11-25 17:01:32,183 INFO L131 PetriNetUnfolder]: For 155676/155676 co-relation queries the response was YES. [2022-11-25 17:01:32,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65796 conditions, 7040 events. 3929/7040 cut-off events. For 155676/155676 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50540 event pairs, 762 based on Foata normal form. 121/7161 useless extension candidates. Maximal degree in co-relation 65710. Up to 2034 conditions per place. [2022-11-25 17:01:32,270 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 684 selfloop transitions, 387 changer transitions 30/1101 dead transitions. [2022-11-25 17:01:32,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1101 transitions, 24694 flow [2022-11-25 17:01:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:01:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:01:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6142 transitions. [2022-11-25 17:01:32,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3944258926277935 [2022-11-25 17:01:32,276 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6142 transitions. [2022-11-25 17:01:32,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6142 transitions. [2022-11-25 17:01:32,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:32,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6142 transitions. [2022-11-25 17:01:32,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 180.64705882352942) internal successors, (6142), 34 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:32,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:32,289 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:32,289 INFO L175 Difference]: Start difference. First operand has 318 places, 668 transitions, 15662 flow. Second operand 34 states and 6142 transitions. [2022-11-25 17:01:32,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1101 transitions, 24694 flow [2022-11-25 17:01:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1101 transitions, 24066 flow, removed 52 selfloop flow, removed 26 redundant places. [2022-11-25 17:01:33,491 INFO L231 Difference]: Finished difference. Result has 332 places, 709 transitions, 16993 flow [2022-11-25 17:01:33,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=15047, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16993, PETRI_PLACES=332, PETRI_TRANSITIONS=709} [2022-11-25 17:01:33,492 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 307 predicate places. [2022-11-25 17:01:33,492 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 709 transitions, 16993 flow [2022-11-25 17:01:33,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:33,493 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] [2022-11-25 17:01:33,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-25 17:01:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:33,695 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:01:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -114130647, now seen corresponding path program 9 times [2022-11-25 17:01:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10457863] [2022-11-25 17:01:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:34,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10457863] [2022-11-25 17:01:34,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10457863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680923922] [2022-11-25 17:01:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:01:34,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:34,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:34,007 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:34,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 17:01:34,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:01:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:01:34,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:34,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:34,605 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 111 treesize of output 76 [2022-11-25 17:01:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:34,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:34,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:34,956 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 161 treesize of output 125 [2022-11-25 17:01:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:36,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680923922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:36,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:36,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-25 17:01:36,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190213567] [2022-11-25 17:01:36,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:36,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:01:36,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:01:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:01:38,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 458 [2022-11-25 17:01:38,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 709 transitions, 16993 flow. Second operand has 32 states, 32 states have (on average 176.96875) internal successors, (5663), 32 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:38,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:38,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 458 [2022-11-25 17:01:38,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:43,989 INFO L130 PetriNetUnfolder]: 3918/7000 cut-off events. [2022-11-25 17:01:43,989 INFO L131 PetriNetUnfolder]: For 164849/164849 co-relation queries the response was YES. [2022-11-25 17:01:44,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67882 conditions, 7000 events. 3918/7000 cut-off events. For 164849/164849 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50104 event pairs, 403 based on Foata normal form. 3/7003 useless extension candidates. Maximal degree in co-relation 67786. Up to 1307 conditions per place. [2022-11-25 17:01:44,141 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 632 selfloop transitions, 398 changer transitions 19/1049 dead transitions. [2022-11-25 17:01:44,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1049 transitions, 24307 flow [2022-11-25 17:01:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:01:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:01:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4736 transitions. [2022-11-25 17:01:44,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3977158212966073 [2022-11-25 17:01:44,144 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4736 transitions. [2022-11-25 17:01:44,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4736 transitions. [2022-11-25 17:01:44,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:44,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4736 transitions. [2022-11-25 17:01:44,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 182.15384615384616) internal successors, (4736), 26 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:44,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 458.0) internal successors, (12366), 27 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:44,155 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 458.0) internal successors, (12366), 27 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:44,155 INFO L175 Difference]: Start difference. First operand has 332 places, 709 transitions, 16993 flow. Second operand 26 states and 4736 transitions. [2022-11-25 17:01:44,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1049 transitions, 24307 flow [2022-11-25 17:01:45,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1049 transitions, 23781 flow, removed 88 selfloop flow, removed 17 redundant places. [2022-11-25 17:01:45,633 INFO L231 Difference]: Finished difference. Result has 339 places, 709 transitions, 17304 flow [2022-11-25 17:01:45,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=16487, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=17304, PETRI_PLACES=339, PETRI_TRANSITIONS=709} [2022-11-25 17:01:45,634 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 314 predicate places. [2022-11-25 17:01:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 709 transitions, 17304 flow [2022-11-25 17:01:45,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 176.96875) internal successors, (5663), 32 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:45,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:45,636 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] [2022-11-25 17:01:45,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:45,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:45,838 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:01:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1469721243, now seen corresponding path program 10 times [2022-11-25 17:01:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127000604] [2022-11-25 17:01:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:46,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:46,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127000604] [2022-11-25 17:01:46,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127000604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:46,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315146174] [2022-11-25 17:01:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:01:46,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:46,176 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:46,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-25 17:01:46,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:01:46,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:01:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:46,743 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-25 17:01:46,743 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 59 treesize of output 32 [2022-11-25 17:01:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:46,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:47,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:47,151 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 161 treesize of output 125 [2022-11-25 17:01:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:48,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315146174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:48,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:48,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2022-11-25 17:01:48,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403442690] [2022-11-25 17:01:48,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:48,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:01:48,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:48,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:01:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:01:51,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 458 [2022-11-25 17:01:51,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 709 transitions, 17304 flow. Second operand has 30 states, 30 states have (on average 174.1) internal successors, (5223), 30 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:51,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:51,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 458 [2022-11-25 17:01:51,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:02,640 INFO L130 PetriNetUnfolder]: 4468/7963 cut-off events. [2022-11-25 17:02:02,640 INFO L131 PetriNetUnfolder]: For 184452/184452 co-relation queries the response was YES. [2022-11-25 17:02:02,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78887 conditions, 7963 events. 4468/7963 cut-off events. For 184452/184452 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 58308 event pairs, 274 based on Foata normal form. 16/7979 useless extension candidates. Maximal degree in co-relation 78791. Up to 2001 conditions per place. [2022-11-25 17:02:02,782 INFO L137 encePairwiseOnDemand]: 444/458 looper letters, 614 selfloop transitions, 692 changer transitions 43/1349 dead transitions. [2022-11-25 17:02:02,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1349 transitions, 30162 flow [2022-11-25 17:02:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 17:02:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-11-25 17:02:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 13669 transitions. [2022-11-25 17:02:02,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38759711903816707 [2022-11-25 17:02:02,793 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 13669 transitions. [2022-11-25 17:02:02,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 13669 transitions. [2022-11-25 17:02:02,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:02,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 13669 transitions. [2022-11-25 17:02:02,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 177.5194805194805) internal successors, (13669), 77 states have internal predecessors, (13669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:02,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 458.0) internal successors, (35724), 78 states have internal predecessors, (35724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:02,822 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 458.0) internal successors, (35724), 78 states have internal predecessors, (35724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:02,822 INFO L175 Difference]: Start difference. First operand has 339 places, 709 transitions, 17304 flow. Second operand 77 states and 13669 transitions. [2022-11-25 17:02:02,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1349 transitions, 30162 flow [2022-11-25 17:02:04,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1349 transitions, 29342 flow, removed 14 selfloop flow, removed 20 redundant places. [2022-11-25 17:02:04,723 INFO L231 Difference]: Finished difference. Result has 426 places, 985 transitions, 24795 flow [2022-11-25 17:02:04,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=16648, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=24795, PETRI_PLACES=426, PETRI_TRANSITIONS=985} [2022-11-25 17:02:04,724 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 401 predicate places. [2022-11-25 17:02:04,724 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 985 transitions, 24795 flow [2022-11-25 17:02:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.1) internal successors, (5223), 30 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:04,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:04,725 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] [2022-11-25 17:02:04,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-25 17:02:04,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:04,927 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:02:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -639114863, now seen corresponding path program 11 times [2022-11-25 17:02:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691641372] [2022-11-25 17:02:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:04,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691641372] [2022-11-25 17:02:05,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691641372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912971931] [2022-11-25 17:02:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:02:05,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:05,302 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:05,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 17:02:05,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:02:05,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:02:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:02:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:05,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:05,948 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 111 treesize of output 76 [2022-11-25 17:02:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:06,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:06,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:06,319 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 161 treesize of output 125 [2022-11-25 17:02:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:07,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912971931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:07,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:07,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:02:07,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813158231] [2022-11-25 17:02:07,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:07,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:02:07,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:02:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:02:11,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:02:11,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 985 transitions, 24795 flow. Second operand has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:11,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:11,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:02:11,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:19,126 INFO L130 PetriNetUnfolder]: 4439/7910 cut-off events. [2022-11-25 17:02:19,126 INFO L131 PetriNetUnfolder]: For 225426/225426 co-relation queries the response was YES. [2022-11-25 17:02:19,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82817 conditions, 7910 events. 4439/7910 cut-off events. For 225426/225426 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 57375 event pairs, 852 based on Foata normal form. 4/7914 useless extension candidates. Maximal degree in co-relation 82689. Up to 2034 conditions per place. [2022-11-25 17:02:19,282 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 866 selfloop transitions, 441 changer transitions 18/1325 dead transitions. [2022-11-25 17:02:19,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1325 transitions, 32713 flow [2022-11-25 17:02:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:02:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 17:02:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6497 transitions. [2022-11-25 17:02:19,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3940441533236293 [2022-11-25 17:02:19,288 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6497 transitions. [2022-11-25 17:02:19,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6497 transitions. [2022-11-25 17:02:19,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:19,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6497 transitions. [2022-11-25 17:02:19,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 180.47222222222223) internal successors, (6497), 36 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:19,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 458.0) internal successors, (16946), 37 states have internal predecessors, (16946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:19,303 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 458.0) internal successors, (16946), 37 states have internal predecessors, (16946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:19,303 INFO L175 Difference]: Start difference. First operand has 426 places, 985 transitions, 24795 flow. Second operand 36 states and 6497 transitions. [2022-11-25 17:02:19,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1325 transitions, 32713 flow [2022-11-25 17:02:22,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1325 transitions, 30129 flow, removed 907 selfloop flow, removed 31 redundant places. [2022-11-25 17:02:22,532 INFO L231 Difference]: Finished difference. Result has 427 places, 995 transitions, 23503 flow [2022-11-25 17:02:22,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=22442, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23503, PETRI_PLACES=427, PETRI_TRANSITIONS=995} [2022-11-25 17:02:22,533 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 402 predicate places. [2022-11-25 17:02:22,533 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 995 transitions, 23503 flow [2022-11-25 17:02:22,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:22,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:22,535 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] [2022-11-25 17:02:22,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-25 17:02:22,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-25 17:02:22,739 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:02:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1845363017, now seen corresponding path program 1 times [2022-11-25 17:02:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322555843] [2022-11-25 17:02:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:22,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:02:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322555843] [2022-11-25 17:02:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322555843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:02:23,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:02:23,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:02:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866082676] [2022-11-25 17:02:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:02:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:02:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:02:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:02:23,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 458 [2022-11-25 17:02:23,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 995 transitions, 23503 flow. Second operand has 9 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:23,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:23,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 458 [2022-11-25 17:02:23,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:26,744 INFO L130 PetriNetUnfolder]: 4490/7979 cut-off events. [2022-11-25 17:02:26,744 INFO L131 PetriNetUnfolder]: For 201413/201413 co-relation queries the response was YES. [2022-11-25 17:02:26,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79335 conditions, 7979 events. 4490/7979 cut-off events. For 201413/201413 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 58262 event pairs, 1267 based on Foata normal form. 38/8017 useless extension candidates. Maximal degree in co-relation 79219. Up to 4900 conditions per place. [2022-11-25 17:02:26,890 INFO L137 encePairwiseOnDemand]: 449/458 looper letters, 891 selfloop transitions, 146 changer transitions 0/1037 dead transitions. [2022-11-25 17:02:26,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1037 transitions, 26534 flow [2022-11-25 17:02:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:02:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:02:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1392 transitions. [2022-11-25 17:02:26,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43418590143480973 [2022-11-25 17:02:26,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1392 transitions. [2022-11-25 17:02:26,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1392 transitions. [2022-11-25 17:02:26,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:26,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1392 transitions. [2022-11-25 17:02:26,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:26,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:26,895 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:26,895 INFO L175 Difference]: Start difference. First operand has 427 places, 995 transitions, 23503 flow. Second operand 7 states and 1392 transitions. [2022-11-25 17:02:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1037 transitions, 26534 flow [2022-11-25 17:02:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1037 transitions, 25992 flow, removed 41 selfloop flow, removed 24 redundant places. [2022-11-25 17:02:29,248 INFO L231 Difference]: Finished difference. Result has 409 places, 1007 transitions, 23704 flow [2022-11-25 17:02:29,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=22981, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23704, PETRI_PLACES=409, PETRI_TRANSITIONS=1007} [2022-11-25 17:02:29,250 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 384 predicate places. [2022-11-25 17:02:29,250 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1007 transitions, 23704 flow [2022-11-25 17:02:29,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:29,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:29,251 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] [2022-11-25 17:02:29,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-25 17:02:29,251 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:02:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -299824723, now seen corresponding path program 12 times [2022-11-25 17:02:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:29,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894902516] [2022-11-25 17:02:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:29,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:29,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:29,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894902516] [2022-11-25 17:02:29,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894902516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:29,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104955112] [2022-11-25 17:02:29,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:02:29,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:29,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:29,657 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:29,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-25 17:02:29,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:02:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:02:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:02:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:30,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:30,481 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 115 treesize of output 80 [2022-11-25 17:02:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:30,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:30,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:30,759 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 161 treesize of output 125 [2022-11-25 17:02:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:32,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104955112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:32,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:32,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:02:32,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36689557] [2022-11-25 17:02:32,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:32,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:02:32,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:02:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:02:36,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:02:36,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1007 transitions, 23704 flow. Second operand has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:36,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:36,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:02:36,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:45,355 INFO L130 PetriNetUnfolder]: 5009/9117 cut-off events. [2022-11-25 17:02:45,356 INFO L131 PetriNetUnfolder]: For 226754/226754 co-relation queries the response was YES. [2022-11-25 17:02:45,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90091 conditions, 9117 events. 5009/9117 cut-off events. For 226754/226754 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 69653 event pairs, 912 based on Foata normal form. 4/9121 useless extension candidates. Maximal degree in co-relation 89979. Up to 1614 conditions per place. [2022-11-25 17:02:45,488 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 1153 selfloop transitions, 510 changer transitions 40/1703 dead transitions. [2022-11-25 17:02:45,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1703 transitions, 40305 flow [2022-11-25 17:02:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:02:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:02:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 8677 transitions. [2022-11-25 17:02:45,495 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39469614264919944 [2022-11-25 17:02:45,495 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 8677 transitions. [2022-11-25 17:02:45,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 8677 transitions. [2022-11-25 17:02:45,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:45,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 8677 transitions. [2022-11-25 17:02:45,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 180.77083333333334) internal successors, (8677), 48 states have internal predecessors, (8677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:45,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 458.0) internal successors, (22442), 49 states have internal predecessors, (22442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:45,514 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 458.0) internal successors, (22442), 49 states have internal predecessors, (22442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:45,514 INFO L175 Difference]: Start difference. First operand has 409 places, 1007 transitions, 23704 flow. Second operand 48 states and 8677 transitions. [2022-11-25 17:02:45,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1703 transitions, 40305 flow [2022-11-25 17:02:48,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1703 transitions, 39943 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:02:48,191 INFO L231 Difference]: Finished difference. Result has 457 places, 1076 transitions, 26427 flow [2022-11-25 17:02:48,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=23522, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=26427, PETRI_PLACES=457, PETRI_TRANSITIONS=1076} [2022-11-25 17:02:48,192 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 432 predicate places. [2022-11-25 17:02:48,192 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1076 transitions, 26427 flow [2022-11-25 17:02:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:48,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:48,193 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] [2022-11-25 17:02:48,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-25 17:02:48,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-25 17:02:48,394 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:02:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1982675961, now seen corresponding path program 2 times [2022-11-25 17:02:48,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:48,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893592747] [2022-11-25 17:02:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:02:48,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893592747] [2022-11-25 17:02:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893592747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:02:48,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:02:48,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:02:48,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637305452] [2022-11-25 17:02:48,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:02:48,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:02:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:02:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:02:48,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 458 [2022-11-25 17:02:48,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1076 transitions, 26427 flow. Second operand has 9 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:48,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:48,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 458 [2022-11-25 17:02:48,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:52,934 INFO L130 PetriNetUnfolder]: 4777/8673 cut-off events. [2022-11-25 17:02:52,934 INFO L131 PetriNetUnfolder]: For 228511/228511 co-relation queries the response was YES. [2022-11-25 17:02:53,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87218 conditions, 8673 events. 4777/8673 cut-off events. For 228511/228511 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 65688 event pairs, 1390 based on Foata normal form. 44/8717 useless extension candidates. Maximal degree in co-relation 87101. Up to 5434 conditions per place. [2022-11-25 17:02:53,062 INFO L137 encePairwiseOnDemand]: 451/458 looper letters, 855 selfloop transitions, 196 changer transitions 0/1051 dead transitions. [2022-11-25 17:02:53,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1051 transitions, 27730 flow [2022-11-25 17:02:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:02:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:02:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1392 transitions. [2022-11-25 17:02:53,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43418590143480973 [2022-11-25 17:02:53,064 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1392 transitions. [2022-11-25 17:02:53,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1392 transitions. [2022-11-25 17:02:53,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:53,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1392 transitions. [2022-11-25 17:02:53,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:53,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:53,067 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:53,067 INFO L175 Difference]: Start difference. First operand has 457 places, 1076 transitions, 26427 flow. Second operand 7 states and 1392 transitions. [2022-11-25 17:02:53,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1051 transitions, 27730 flow [2022-11-25 17:02:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1051 transitions, 26896 flow, removed 109 selfloop flow, removed 35 redundant places. [2022-11-25 17:02:55,523 INFO L231 Difference]: Finished difference. Result has 418 places, 1022 transitions, 24694 flow [2022-11-25 17:02:55,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=24248, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24694, PETRI_PLACES=418, PETRI_TRANSITIONS=1022} [2022-11-25 17:02:55,524 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 393 predicate places. [2022-11-25 17:02:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1022 transitions, 24694 flow [2022-11-25 17:02:55,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:55,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:55,525 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] [2022-11-25 17:02:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-25 17:02:55,525 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:02:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1402463541, now seen corresponding path program 13 times [2022-11-25 17:02:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:55,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338539224] [2022-11-25 17:02:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:02:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:55,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338539224] [2022-11-25 17:02:55,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338539224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:55,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261105906] [2022-11-25 17:02:55,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:02:55,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:55,871 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:55,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-25 17:02:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:02:56,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:02:56,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:56,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:56,692 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 161 treesize of output 125 [2022-11-25 17:02:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:02:57,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261105906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:57,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:57,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:02:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367239595] [2022-11-25 17:02:57,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:02:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:02:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:03:01,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 458 [2022-11-25 17:03:01,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1022 transitions, 24694 flow. Second operand has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:01,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:01,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 458 [2022-11-25 17:03:01,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:07,857 INFO L130 PetriNetUnfolder]: 4777/8672 cut-off events. [2022-11-25 17:03:07,857 INFO L131 PetriNetUnfolder]: For 217404/217404 co-relation queries the response was YES. [2022-11-25 17:03:07,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86839 conditions, 8672 events. 4777/8672 cut-off events. For 217404/217404 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 65189 event pairs, 884 based on Foata normal form. 1/8673 useless extension candidates. Maximal degree in co-relation 86730. Up to 2016 conditions per place. [2022-11-25 17:03:08,022 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 819 selfloop transitions, 451 changer transitions 23/1293 dead transitions. [2022-11-25 17:03:08,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1293 transitions, 31517 flow [2022-11-25 17:03:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:03:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 17:03:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5590 transitions. [2022-11-25 17:03:08,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3937174249894351 [2022-11-25 17:03:08,027 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5590 transitions. [2022-11-25 17:03:08,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5590 transitions. [2022-11-25 17:03:08,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:08,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5590 transitions. [2022-11-25 17:03:08,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 180.32258064516128) internal successors, (5590), 31 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:08,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 458.0) internal successors, (14656), 32 states have internal predecessors, (14656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:08,041 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 458.0) internal successors, (14656), 32 states have internal predecessors, (14656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:08,041 INFO L175 Difference]: Start difference. First operand has 418 places, 1022 transitions, 24694 flow. Second operand 31 states and 5590 transitions. [2022-11-25 17:03:08,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1293 transitions, 31517 flow [2022-11-25 17:03:10,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1293 transitions, 31227 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-11-25 17:03:10,725 INFO L231 Difference]: Finished difference. Result has 443 places, 1018 transitions, 25284 flow [2022-11-25 17:03:10,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=24447, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25284, PETRI_PLACES=443, PETRI_TRANSITIONS=1018} [2022-11-25 17:03:10,726 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 418 predicate places. [2022-11-25 17:03:10,726 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1018 transitions, 25284 flow [2022-11-25 17:03:10,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 175.8) internal successors, (6153), 35 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:10,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:10,727 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] [2022-11-25 17:03:10,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:10,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:10,933 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:03:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1497730025, now seen corresponding path program 3 times [2022-11-25 17:03:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:10,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461309883] [2022-11-25 17:03:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:10,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:03:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461309883] [2022-11-25 17:03:11,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461309883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:03:11,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:03:11,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:03:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977058588] [2022-11-25 17:03:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:03:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:03:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:03:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:03:11,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 458 [2022-11-25 17:03:11,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1018 transitions, 25284 flow. Second operand has 9 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:11,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:11,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 458 [2022-11-25 17:03:11,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:15,356 INFO L130 PetriNetUnfolder]: 4553/8311 cut-off events. [2022-11-25 17:03:15,356 INFO L131 PetriNetUnfolder]: For 209564/209564 co-relation queries the response was YES. [2022-11-25 17:03:15,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83443 conditions, 8311 events. 4553/8311 cut-off events. For 209564/209564 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 62652 event pairs, 1200 based on Foata normal form. 52/8363 useless extension candidates. Maximal degree in co-relation 83335. Up to 5413 conditions per place. [2022-11-25 17:03:15,520 INFO L137 encePairwiseOnDemand]: 451/458 looper letters, 821 selfloop transitions, 206 changer transitions 2/1029 dead transitions. [2022-11-25 17:03:15,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1029 transitions, 27298 flow [2022-11-25 17:03:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:03:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:03:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1401 transitions. [2022-11-25 17:03:15,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4369931378665003 [2022-11-25 17:03:15,522 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1401 transitions. [2022-11-25 17:03:15,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1401 transitions. [2022-11-25 17:03:15,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:15,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1401 transitions. [2022-11-25 17:03:15,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.14285714285714) internal successors, (1401), 7 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:15,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:15,525 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:15,525 INFO L175 Difference]: Start difference. First operand has 443 places, 1018 transitions, 25284 flow. Second operand 7 states and 1401 transitions. [2022-11-25 17:03:15,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1029 transitions, 27298 flow [2022-11-25 17:03:18,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1029 transitions, 26550 flow, removed 31 selfloop flow, removed 27 redundant places. [2022-11-25 17:03:18,268 INFO L231 Difference]: Finished difference. Result has 418 places, 993 transitions, 24453 flow [2022-11-25 17:03:18,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=23667, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24453, PETRI_PLACES=418, PETRI_TRANSITIONS=993} [2022-11-25 17:03:18,270 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 393 predicate places. [2022-11-25 17:03:18,270 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 993 transitions, 24453 flow [2022-11-25 17:03:18,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:18,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:18,271 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] [2022-11-25 17:03:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-25 17:03:18,271 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:03:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -999497777, now seen corresponding path program 4 times [2022-11-25 17:03:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139713715] [2022-11-25 17:03:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:18,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139713715] [2022-11-25 17:03:18,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139713715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165339687] [2022-11-25 17:03:18,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:03:18,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:18,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:18,882 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:18,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-25 17:03:19,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:03:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:03:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:19,170 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 18 treesize of output 20 [2022-11-25 17:03:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:03:19,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:03:19,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165339687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:03:19,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:03:19,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2022-11-25 17:03:19,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903128564] [2022-11-25 17:03:19,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:03:19,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:03:19,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:03:19,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:03:19,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 458 [2022-11-25 17:03:19,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 993 transitions, 24453 flow. Second operand has 9 states, 9 states have (on average 190.33333333333334) internal successors, (1713), 9 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:19,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:19,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 458 [2022-11-25 17:03:19,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:24,197 INFO L130 PetriNetUnfolder]: 4578/8419 cut-off events. [2022-11-25 17:03:24,197 INFO L131 PetriNetUnfolder]: For 208104/208104 co-relation queries the response was YES. [2022-11-25 17:03:24,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84719 conditions, 8419 events. 4578/8419 cut-off events. For 208104/208104 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 64284 event pairs, 1280 based on Foata normal form. 34/8453 useless extension candidates. Maximal degree in co-relation 84611. Up to 5408 conditions per place. [2022-11-25 17:03:24,322 INFO L137 encePairwiseOnDemand]: 448/458 looper letters, 902 selfloop transitions, 159 changer transitions 19/1080 dead transitions. [2022-11-25 17:03:24,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1080 transitions, 28366 flow [2022-11-25 17:03:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:03:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:03:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1948 transitions. [2022-11-25 17:03:24,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4253275109170306 [2022-11-25 17:03:24,325 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1948 transitions. [2022-11-25 17:03:24,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1948 transitions. [2022-11-25 17:03:24,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:24,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1948 transitions. [2022-11-25 17:03:24,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.8) internal successors, (1948), 10 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:24,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:24,329 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 458.0) internal successors, (5038), 11 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:24,329 INFO L175 Difference]: Start difference. First operand has 418 places, 993 transitions, 24453 flow. Second operand 10 states and 1948 transitions. [2022-11-25 17:03:24,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1080 transitions, 28366 flow [2022-11-25 17:03:26,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1080 transitions, 27965 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 17:03:26,652 INFO L231 Difference]: Finished difference. Result has 424 places, 987 transitions, 24232 flow [2022-11-25 17:03:26,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=24070, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24232, PETRI_PLACES=424, PETRI_TRANSITIONS=987} [2022-11-25 17:03:26,653 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 399 predicate places. [2022-11-25 17:03:26,653 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 987 transitions, 24232 flow [2022-11-25 17:03:26,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 190.33333333333334) internal successors, (1713), 9 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:26,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:26,653 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] [2022-11-25 17:03:26,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-25 17:03:26,854 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:03:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -490117101, now seen corresponding path program 5 times [2022-11-25 17:03:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:26,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076941095] [2022-11-25 17:03:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:27,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:27,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076941095] [2022-11-25 17:03:27,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076941095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:27,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513536315] [2022-11-25 17:03:27,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:03:27,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:27,359 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:27,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_716d50d3-53f4-40a0-96e4-91b4da06a7cf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 17:03:27,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:03:27,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:03:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:27,853 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:03:27,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2022-11-25 17:03:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:03:27,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:03:27,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513536315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:03:27,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:03:27,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-11-25 17:03:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705761290] [2022-11-25 17:03:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:03:27,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:03:27,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:03:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:03:28,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 458 [2022-11-25 17:03:28,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 987 transitions, 24232 flow. Second operand has 10 states, 10 states have (on average 190.1) internal successors, (1901), 10 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:28,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:28,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 458 [2022-11-25 17:03:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand