./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:34:07,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:34:07,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:34:07,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:34:07,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:34:07,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:34:07,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:34:07,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:34:07,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:34:07,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:34:07,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:34:07,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:34:07,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:34:07,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:34:07,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:34:07,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:34:07,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:34:07,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:34:07,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:34:07,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:34:07,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:34:07,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:34:07,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:34:07,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:34:07,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:34:07,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:34:07,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:34:07,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:34:07,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:34:07,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:34:07,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:34:07,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:34:07,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:34:07,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:34:07,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:34:07,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:34:07,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:34:07,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:34:07,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:34:07,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:34:07,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:34:07,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:34:07,769 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:34:07,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:34:07,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:34:07,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:34:07,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:34:07,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:34:07,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:34:07,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:34:07,771 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:34:07,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:34:07,772 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:34:07,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:34:07,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:34:07,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:34:07,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:34:07,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:34:07,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:34:07,773 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:34:07,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:34:07,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:34:07,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:34:07,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:34:07,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:34:07,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:34:07,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:34:07,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:34:07,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:34:07,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:34:07,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:34:07,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:34:07,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:34:07,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:34:07,775 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:34:07,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:34:07,776 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:34:07,776 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_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-12-13 15:34:07,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:34:07,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:34:08,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:34:08,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:34:08,001 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:34:08,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-12-13 15:34:10,638 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:34:10,793 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:34:10,793 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-12-13 15:34:10,798 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/data/239220090/a71ba3b80d534ed4a642a3f4df7ae60d/FLAGf0f9887c5 [2022-12-13 15:34:10,809 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/data/239220090/a71ba3b80d534ed4a642a3f4df7ae60d [2022-12-13 15:34:10,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:34:10,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:34:10,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:34:10,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:34:10,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:34:10,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:34:10" (1/1) ... [2022-12-13 15:34:10,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b331395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:10, skipping insertion in model container [2022-12-13 15:34:10,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:34:10" (1/1) ... [2022-12-13 15:34:10,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:34:10,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:34:10,972 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_4ec9bd48-8d62-4130-a89d-87a14df03b31/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-13 15:34:10,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:34:10,991 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:34:11,012 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_4ec9bd48-8d62-4130-a89d-87a14df03b31/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-13 15:34:11,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:34:11,030 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:34:11,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11 WrapperNode [2022-12-13 15:34:11,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:34:11,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:34:11,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:34:11,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:34:11,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,071 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 194 [2022-12-13 15:34:11,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:34:11,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:34:11,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:34:11,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:34:11,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:34:11,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:34:11,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:34:11,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:34:11,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (1/1) ... [2022-12-13 15:34:11,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:34:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:11,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:34:11,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:34:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:34:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:34:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:34:11,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:34:11,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:34:11,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:34:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:34:11,161 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:34:11,239 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:34:11,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:34:11,505 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:34:11,516 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:34:11,516 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:34:11,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:34:11 BoogieIcfgContainer [2022-12-13 15:34:11,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:34:11,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:34:11,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:34:11,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:34:11,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:34:10" (1/3) ... [2022-12-13 15:34:11,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7942e117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:34:11, skipping insertion in model container [2022-12-13 15:34:11,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:34:11" (2/3) ... [2022-12-13 15:34:11,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7942e117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:34:11, skipping insertion in model container [2022-12-13 15:34:11,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:34:11" (3/3) ... [2022-12-13 15:34:11,527 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2022-12-13 15:34:11,536 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:34:11,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:34:11,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:34:11,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:34:11,642 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 15:34:11,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 262 transitions, 540 flow [2022-12-13 15:34:11,740 INFO L130 PetriNetUnfolder]: 21/260 cut-off events. [2022-12-13 15:34:11,740 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:34:11,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 260 events. 21/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-12-13 15:34:11,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 262 transitions, 540 flow [2022-12-13 15:34:11,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 251 transitions, 514 flow [2022-12-13 15:34:11,752 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:34:11,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 251 transitions, 514 flow [2022-12-13 15:34:11,762 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 251 transitions, 514 flow [2022-12-13 15:34:11,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 514 flow [2022-12-13 15:34:11,803 INFO L130 PetriNetUnfolder]: 21/251 cut-off events. [2022-12-13 15:34:11,803 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:34:11,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 251 events. 21/251 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 292 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-12-13 15:34:11,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 7208 [2022-12-13 15:34:16,722 INFO L134 LiptonReduction]: Checked pairs total: 6679 [2022-12-13 15:34:16,722 INFO L136 LiptonReduction]: Total number of compositions: 295 [2022-12-13 15:34:16,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:34:16,736 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;@6acb1bef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:34:16,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:34:16,740 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2022-12-13 15:34:16,740 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:34:16,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:16,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:16,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1033255890, now seen corresponding path program 1 times [2022-12-13 15:34:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302964242] [2022-12-13 15:34:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:34:17,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302964242] [2022-12-13 15:34:17,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302964242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:17,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:34:17,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:34:17,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652469034] [2022-12-13 15:34:17,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:17,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:34:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:34:17,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:34:17,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 557 [2022-12-13 15:34:17,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:17,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 557 [2022-12-13 15:34:17,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:17,135 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2022-12-13 15:34:17,135 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:34:17,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 191 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2022-12-13 15:34:17,137 INFO L137 encePairwiseOnDemand]: 552/557 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2022-12-13 15:34:17,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2022-12-13 15:34:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:34:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:34:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-12-13 15:34:17,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43087971274685816 [2022-12-13 15:34:17,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-12-13 15:34:17,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-12-13 15:34:17,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:17,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-12-13 15:34:17,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,174 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 720 transitions. [2022-12-13 15:34:17,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2022-12-13 15:34:17,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 15:34:17,179 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2022-12-13 15:34:17,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2022-12-13 15:34:17,184 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2022-12-13 15:34:17,184 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2022-12-13 15:34:17,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:17,185 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:34:17,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1683975678, now seen corresponding path program 1 times [2022-12-13 15:34:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710110587] [2022-12-13 15:34:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:17,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:34:17,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710110587] [2022-12-13 15:34:17,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710110587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460808809] [2022-12-13 15:34:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:17,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:17,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:17,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:34:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:34:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:34:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:34:17,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460808809] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:17,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:17,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 15:34:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802245489] [2022-12-13 15:34:17,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:17,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:34:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:34:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:34:17,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 557 [2022-12-13 15:34:17,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 230.875) internal successors, (1847), 8 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:17,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 557 [2022-12-13 15:34:17,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:17,630 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2022-12-13 15:34:17,630 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:34:17,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2022-12-13 15:34:17,631 INFO L137 encePairwiseOnDemand]: 552/557 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2022-12-13 15:34:17,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2022-12-13 15:34:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:34:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:34:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1402 transitions. [2022-12-13 15:34:17,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.419509275882705 [2022-12-13 15:34:17,636 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1402 transitions. [2022-12-13 15:34:17,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1402 transitions. [2022-12-13 15:34:17,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:17,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1402 transitions. [2022-12-13 15:34:17,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.66666666666666) internal successors, (1402), 6 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,650 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1402 transitions. [2022-12-13 15:34:17,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2022-12-13 15:34:17,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:17,651 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2022-12-13 15:34:17,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2022-12-13 15:34:17,651 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2022-12-13 15:34:17,652 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2022-12-13 15:34:17,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 230.875) internal successors, (1847), 8 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:17,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:17,653 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:17,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:34:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:17,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash 540251860, now seen corresponding path program 2 times [2022-12-13 15:34:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:17,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574841739] [2022-12-13 15:34:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:34:18,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:18,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574841739] [2022-12-13 15:34:18,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574841739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:18,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072249653] [2022-12-13 15:34:18,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:34:18,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:18,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:18,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:34:18,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 15:34:18,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:34:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 15:34:18,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:34:18,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072249653] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:18,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:34:18,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-13 15:34:18,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076199470] [2022-12-13 15:34:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:18,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:34:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:34:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:34:18,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 557 [2022-12-13 15:34:18,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:18,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 557 [2022-12-13 15:34:18,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:18,302 INFO L130 PetriNetUnfolder]: 64/123 cut-off events. [2022-12-13 15:34:18,302 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:34:18,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 123 events. 64/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 303 event pairs, 2 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 231. Up to 91 conditions per place. [2022-12-13 15:34:18,303 INFO L137 encePairwiseOnDemand]: 551/557 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 15:34:18,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 238 flow [2022-12-13 15:34:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:34:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:34:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 970 transitions. [2022-12-13 15:34:18,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4353680430879713 [2022-12-13 15:34:18,306 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 970 transitions. [2022-12-13 15:34:18,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 970 transitions. [2022-12-13 15:34:18,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:18,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 970 transitions. [2022-12-13 15:34:18,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,310 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,310 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 970 transitions. [2022-12-13 15:34:18,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 238 flow [2022-12-13 15:34:18,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 222 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:18,312 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 139 flow [2022-12-13 15:34:18,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-12-13 15:34:18,313 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2022-12-13 15:34:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 139 flow [2022-12-13 15:34:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:18,313 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:18,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:34:18,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:18,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1486107954, now seen corresponding path program 3 times [2022-12-13 15:34:18,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:18,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235150189] [2022-12-13 15:34:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:18,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:34:18,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:18,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235150189] [2022-12-13 15:34:18,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235150189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:18,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500756707] [2022-12-13 15:34:18,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:34:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:18,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:18,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:18,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:34:18,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 15:34:18,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:34:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 15:34:18,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:34:18,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500756707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:18,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:34:18,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-13 15:34:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915674272] [2022-12-13 15:34:18,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:18,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:34:18,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:34:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:34:18,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 557 [2022-12-13 15:34:18,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 239.25) internal successors, (957), 4 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:18,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 557 [2022-12-13 15:34:18,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:18,841 INFO L130 PetriNetUnfolder]: 90/171 cut-off events. [2022-12-13 15:34:18,841 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-12-13 15:34:18,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 171 events. 90/171 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 459 event pairs, 25 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 413. Up to 113 conditions per place. [2022-12-13 15:34:18,842 INFO L137 encePairwiseOnDemand]: 553/557 looper letters, 42 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2022-12-13 15:34:18,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 277 flow [2022-12-13 15:34:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:34:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:34:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 978 transitions. [2022-12-13 15:34:18,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43895870736086173 [2022-12-13 15:34:18,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 978 transitions. [2022-12-13 15:34:18,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 978 transitions. [2022-12-13 15:34:18,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:18,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 978 transitions. [2022-12-13 15:34:18,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.5) internal successors, (978), 4 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,853 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,853 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 139 flow. Second operand 4 states and 978 transitions. [2022-12-13 15:34:18,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 277 flow [2022-12-13 15:34:18,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 271 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:18,856 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 164 flow [2022-12-13 15:34:18,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-12-13 15:34:18,857 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2022-12-13 15:34:18,857 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 164 flow [2022-12-13 15:34:18,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.25) internal successors, (957), 4 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:18,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:18,858 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:18,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:34:19,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:19,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1591994020, now seen corresponding path program 4 times [2022-12-13 15:34:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838138282] [2022-12-13 15:34:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:34:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838138282] [2022-12-13 15:34:19,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838138282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453219523] [2022-12-13 15:34:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:34:19,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:19,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:19,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:34:19,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:34:19,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:19,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:34:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:34:19,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:34:19,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453219523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:19,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:19,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 15:34:19,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735447194] [2022-12-13 15:34:19,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:19,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:34:19,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:34:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:34:19,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 557 [2022-12-13 15:34:19,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 164 flow. Second operand has 13 states, 13 states have (on average 230.15384615384616) internal successors, (2992), 13 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:19,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:19,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 557 [2022-12-13 15:34:19,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:19,567 INFO L130 PetriNetUnfolder]: 90/173 cut-off events. [2022-12-13 15:34:19,567 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 15:34:19,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 173 events. 90/173 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 429 event pairs, 56 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 500. Up to 164 conditions per place. [2022-12-13 15:34:19,569 INFO L137 encePairwiseOnDemand]: 552/557 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2022-12-13 15:34:19,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 244 flow [2022-12-13 15:34:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:34:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:34:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1628 transitions. [2022-12-13 15:34:19,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41754295973326494 [2022-12-13 15:34:19,572 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1628 transitions. [2022-12-13 15:34:19,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1628 transitions. [2022-12-13 15:34:19,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:19,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1628 transitions. [2022-12-13 15:34:19,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:19,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 557.0) internal successors, (4456), 8 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:19,579 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 557.0) internal successors, (4456), 8 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:19,579 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 164 flow. Second operand 7 states and 1628 transitions. [2022-12-13 15:34:19,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 244 flow [2022-12-13 15:34:19,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 234 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:19,581 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 200 flow [2022-12-13 15:34:19,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2022-12-13 15:34:19,582 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2022-12-13 15:34:19,582 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 200 flow [2022-12-13 15:34:19,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 230.15384615384616) internal successors, (2992), 13 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:19,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:19,584 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:19,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:34:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:19,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash 59382368, now seen corresponding path program 5 times [2022-12-13 15:34:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:19,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540093122] [2022-12-13 15:34:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:19,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540093122] [2022-12-13 15:34:19,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540093122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:19,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:34:19,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:34:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364226514] [2022-12-13 15:34:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:34:19,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:34:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:34:20,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 557 [2022-12-13 15:34:20,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:20,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 557 [2022-12-13 15:34:20,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:20,101 INFO L130 PetriNetUnfolder]: 114/213 cut-off events. [2022-12-13 15:34:20,102 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-12-13 15:34:20,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641 conditions, 213 events. 114/213 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 583 event pairs, 17 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 562. Up to 143 conditions per place. [2022-12-13 15:34:20,103 INFO L137 encePairwiseOnDemand]: 551/557 looper letters, 42 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2022-12-13 15:34:20,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 341 flow [2022-12-13 15:34:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:34:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:34:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 969 transitions. [2022-12-13 15:34:20,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43491921005386 [2022-12-13 15:34:20,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 969 transitions. [2022-12-13 15:34:20,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 969 transitions. [2022-12-13 15:34:20,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:20,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 969 transitions. [2022-12-13 15:34:20,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.25) internal successors, (969), 4 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,109 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,109 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 200 flow. Second operand 4 states and 969 transitions. [2022-12-13 15:34:20,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 341 flow [2022-12-13 15:34:20,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 317 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 15:34:20,111 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 210 flow [2022-12-13 15:34:20,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2022-12-13 15:34:20,112 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2022-12-13 15:34:20,112 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 210 flow [2022-12-13 15:34:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:20,113 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:20,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:34:20,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash -303716100, now seen corresponding path program 1 times [2022-12-13 15:34:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:20,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285629238] [2022-12-13 15:34:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 15:34:20,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:20,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285629238] [2022-12-13 15:34:20,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285629238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:20,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:34:20,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:34:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388903137] [2022-12-13 15:34:20,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:20,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:34:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:34:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:34:20,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 557 [2022-12-13 15:34:20,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:20,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 557 [2022-12-13 15:34:20,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:20,428 INFO L130 PetriNetUnfolder]: 160/299 cut-off events. [2022-12-13 15:34:20,428 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2022-12-13 15:34:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 299 events. 160/299 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1033 event pairs, 48 based on Foata normal form. 4/281 useless extension candidates. Maximal degree in co-relation 877. Up to 182 conditions per place. [2022-12-13 15:34:20,431 INFO L137 encePairwiseOnDemand]: 553/557 looper letters, 51 selfloop transitions, 5 changer transitions 2/58 dead transitions. [2022-12-13 15:34:20,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 411 flow [2022-12-13 15:34:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:34:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:34:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 979 transitions. [2022-12-13 15:34:20,433 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394075403949731 [2022-12-13 15:34:20,434 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 979 transitions. [2022-12-13 15:34:20,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 979 transitions. [2022-12-13 15:34:20,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:20,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 979 transitions. [2022-12-13 15:34:20,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.75) internal successors, (979), 4 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,438 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 210 flow. Second operand 4 states and 979 transitions. [2022-12-13 15:34:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 411 flow [2022-12-13 15:34:20,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:20,440 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 236 flow [2022-12-13 15:34:20,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-12-13 15:34:20,441 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2022-12-13 15:34:20,441 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 236 flow [2022-12-13 15:34:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:20,442 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:34:20,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1960067516, now seen corresponding path program 2 times [2022-12-13 15:34:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:20,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353262206] [2022-12-13 15:34:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 15:34:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:20,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353262206] [2022-12-13 15:34:20,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353262206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:20,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:34:20,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:34:20,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870266322] [2022-12-13 15:34:20,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:20,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:34:20,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:34:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:34:20,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 557 [2022-12-13 15:34:20,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 237.5) internal successors, (950), 4 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:20,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 557 [2022-12-13 15:34:20,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:20,770 INFO L130 PetriNetUnfolder]: 145/270 cut-off events. [2022-12-13 15:34:20,771 INFO L131 PetriNetUnfolder]: For 607/607 co-relation queries the response was YES. [2022-12-13 15:34:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 270 events. 145/270 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 889 event pairs, 40 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 890. Up to 182 conditions per place. [2022-12-13 15:34:20,773 INFO L137 encePairwiseOnDemand]: 552/557 looper letters, 50 selfloop transitions, 6 changer transitions 3/59 dead transitions. [2022-12-13 15:34:20,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 447 flow [2022-12-13 15:34:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:34:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:34:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2022-12-13 15:34:20,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358168761220826 [2022-12-13 15:34:20,775 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2022-12-13 15:34:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2022-12-13 15:34:20,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:20,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2022-12-13 15:34:20,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,779 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,779 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 236 flow. Second operand 4 states and 971 transitions. [2022-12-13 15:34:20,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 447 flow [2022-12-13 15:34:20,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 439 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:20,781 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 254 flow [2022-12-13 15:34:20,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2022-12-13 15:34:20,782 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2022-12-13 15:34:20,782 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 254 flow [2022-12-13 15:34:20,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.5) internal successors, (950), 4 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:20,783 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:20,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:34:20,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -847682598, now seen corresponding path program 1 times [2022-12-13 15:34:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:20,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5417564] [2022-12-13 15:34:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 15:34:20,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5417564] [2022-12-13 15:34:20,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5417564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:34:20,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:34:20,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:34:20,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910418500] [2022-12-13 15:34:20,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:34:20,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:34:20,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:34:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:34:20,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 557 [2022-12-13 15:34:20,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:20,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:20,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 557 [2022-12-13 15:34:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:21,082 INFO L130 PetriNetUnfolder]: 125/230 cut-off events. [2022-12-13 15:34:21,082 INFO L131 PetriNetUnfolder]: For 658/658 co-relation queries the response was YES. [2022-12-13 15:34:21,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 230 events. 125/230 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 643 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 783. Up to 177 conditions per place. [2022-12-13 15:34:21,084 INFO L137 encePairwiseOnDemand]: 553/557 looper letters, 48 selfloop transitions, 7 changer transitions 1/56 dead transitions. [2022-12-13 15:34:21,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 446 flow [2022-12-13 15:34:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:34:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:34:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 969 transitions. [2022-12-13 15:34:21,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43491921005386 [2022-12-13 15:34:21,086 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 969 transitions. [2022-12-13 15:34:21,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 969 transitions. [2022-12-13 15:34:21,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:21,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 969 transitions. [2022-12-13 15:34:21,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.25) internal successors, (969), 4 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:21,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:21,089 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:21,090 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 254 flow. Second operand 4 states and 969 transitions. [2022-12-13 15:34:21,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 446 flow [2022-12-13 15:34:21,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 426 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 15:34:21,092 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 271 flow [2022-12-13 15:34:21,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2022-12-13 15:34:21,092 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2022-12-13 15:34:21,092 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 271 flow [2022-12-13 15:34:21,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:21,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:21,093 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:21,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:34:21,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash -28046960, now seen corresponding path program 1 times [2022-12-13 15:34:21,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:21,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149081872] [2022-12-13 15:34:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149081872] [2022-12-13 15:34:22,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149081872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576885579] [2022-12-13 15:34:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:22,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:22,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:22,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:34:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:22,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:22,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:22,319 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 27 treesize of output 19 [2022-12-13 15:34:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:22,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:23,030 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:34:23,030 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 42 treesize of output 52 [2022-12-13 15:34:23,074 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:23,075 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 42 treesize of output 1 [2022-12-13 15:34:23,082 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:23,082 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 42 treesize of output 1 [2022-12-13 15:34:23,084 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:23,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576885579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:23,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:23,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-13 15:34:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577731187] [2022-12-13 15:34:23,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:23,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:34:23,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:23,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:34:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:34:24,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:24,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 271 flow. Second operand has 24 states, 24 states have (on average 211.08333333333334) internal successors, (5066), 24 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:24,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:24,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:25,143 INFO L130 PetriNetUnfolder]: 231/416 cut-off events. [2022-12-13 15:34:25,144 INFO L131 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2022-12-13 15:34:25,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 416 events. 231/416 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1550 event pairs, 12 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1429. Up to 150 conditions per place. [2022-12-13 15:34:25,146 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 72 selfloop transitions, 23 changer transitions 4/99 dead transitions. [2022-12-13 15:34:25,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 729 flow [2022-12-13 15:34:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:34:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:34:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2586 transitions. [2022-12-13 15:34:25,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3868940754039497 [2022-12-13 15:34:25,149 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2586 transitions. [2022-12-13 15:34:25,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2586 transitions. [2022-12-13 15:34:25,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:25,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2586 transitions. [2022-12-13 15:34:25,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 215.5) internal successors, (2586), 12 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:25,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:25,158 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:25,159 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 271 flow. Second operand 12 states and 2586 transitions. [2022-12-13 15:34:25,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 729 flow [2022-12-13 15:34:25,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 685 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 15:34:25,161 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 420 flow [2022-12-13 15:34:25,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=420, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2022-12-13 15:34:25,162 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2022-12-13 15:34:25,162 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 420 flow [2022-12-13 15:34:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 211.08333333333334) internal successors, (5066), 24 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:25,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:25,163 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:25,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 15:34:25,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:25,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:25,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1378247016, now seen corresponding path program 2 times [2022-12-13 15:34:25,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:25,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109714595] [2022-12-13 15:34:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:25,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109714595] [2022-12-13 15:34:26,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109714595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:26,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271152716] [2022-12-13 15:34:26,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:34:26,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:26,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:26,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:34:26,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:34:26,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:26,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:26,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:26,418 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 27 treesize of output 19 [2022-12-13 15:34:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:26,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:27,034 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:34:27,035 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 42 treesize of output 52 [2022-12-13 15:34:27,062 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:27,062 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 42 treesize of output 1 [2022-12-13 15:34:27,066 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:27,067 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 42 treesize of output 1 [2022-12-13 15:34:27,068 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:27,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271152716] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:27,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:27,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:34:27,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953170787] [2022-12-13 15:34:27,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:34:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:34:27,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:34:28,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:28,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 420 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:28,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:28,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:28,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:28,984 INFO L130 PetriNetUnfolder]: 262/470 cut-off events. [2022-12-13 15:34:28,985 INFO L131 PetriNetUnfolder]: For 1431/1431 co-relation queries the response was YES. [2022-12-13 15:34:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 470 events. 262/470 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1788 event pairs, 44 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 1890. Up to 334 conditions per place. [2022-12-13 15:34:28,988 INFO L137 encePairwiseOnDemand]: 547/557 looper letters, 67 selfloop transitions, 24 changer transitions 4/95 dead transitions. [2022-12-13 15:34:28,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 834 flow [2022-12-13 15:34:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:34:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:34:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2573 transitions. [2022-12-13 15:34:28,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38494913225613403 [2022-12-13 15:34:28,994 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2573 transitions. [2022-12-13 15:34:28,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2573 transitions. [2022-12-13 15:34:28,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:28,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2573 transitions. [2022-12-13 15:34:28,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.41666666666666) internal successors, (2573), 12 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:29,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:29,007 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:29,007 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 420 flow. Second operand 12 states and 2573 transitions. [2022-12-13 15:34:29,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 834 flow [2022-12-13 15:34:29,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 821 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 15:34:29,011 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 583 flow [2022-12-13 15:34:29,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=583, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2022-12-13 15:34:29,012 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 57 predicate places. [2022-12-13 15:34:29,012 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 583 flow [2022-12-13 15:34:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:29,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:29,013 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:29,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:34:29,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:29,215 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1320214440, now seen corresponding path program 3 times [2022-12-13 15:34:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:29,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373996987] [2022-12-13 15:34:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373996987] [2022-12-13 15:34:30,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373996987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612435591] [2022-12-13 15:34:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:34:30,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:30,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:30,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:34:30,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:34:30,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:30,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:30,285 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 27 treesize of output 19 [2022-12-13 15:34:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:30,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:30,863 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:34:30,863 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 42 treesize of output 52 [2022-12-13 15:34:30,890 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:30,891 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 42 treesize of output 1 [2022-12-13 15:34:30,896 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:30,896 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 42 treesize of output 1 [2022-12-13 15:34:30,898 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612435591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:30,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:30,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:34:30,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622662714] [2022-12-13 15:34:30,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:34:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:34:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:34:32,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 557 [2022-12-13 15:34:32,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 583 flow. Second operand has 23 states, 23 states have (on average 210.08695652173913) internal successors, (4832), 23 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:32,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:32,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 557 [2022-12-13 15:34:32,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:32,750 INFO L130 PetriNetUnfolder]: 291/524 cut-off events. [2022-12-13 15:34:32,751 INFO L131 PetriNetUnfolder]: For 2173/2173 co-relation queries the response was YES. [2022-12-13 15:34:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 524 events. 291/524 cut-off events. For 2173/2173 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2118 event pairs, 38 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 2396. Up to 369 conditions per place. [2022-12-13 15:34:32,754 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 68 selfloop transitions, 24 changer transitions 10/102 dead transitions. [2022-12-13 15:34:32,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 102 transitions, 1011 flow [2022-12-13 15:34:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:34:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:34:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2771 transitions. [2022-12-13 15:34:32,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38268195000690514 [2022-12-13 15:34:32,757 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2771 transitions. [2022-12-13 15:34:32,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2771 transitions. [2022-12-13 15:34:32,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:32,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2771 transitions. [2022-12-13 15:34:32,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 213.15384615384616) internal successors, (2771), 13 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:32,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:32,765 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:32,765 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 583 flow. Second operand 13 states and 2771 transitions. [2022-12-13 15:34:32,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 102 transitions, 1011 flow [2022-12-13 15:34:32,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 929 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-12-13 15:34:32,771 INFO L231 Difference]: Finished difference. Result has 90 places, 70 transitions, 620 flow [2022-12-13 15:34:32,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=620, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2022-12-13 15:34:32,771 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 67 predicate places. [2022-12-13 15:34:32,771 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 620 flow [2022-12-13 15:34:32,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 210.08695652173913) internal successors, (4832), 23 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:32,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:32,772 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:32,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 15:34:32,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 15:34:32,973 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:32,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1904743490, now seen corresponding path program 4 times [2022-12-13 15:34:32,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:32,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873034401] [2022-12-13 15:34:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873034401] [2022-12-13 15:34:33,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873034401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116840816] [2022-12-13 15:34:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:34:33,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:33,505 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:33,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:34:33,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:34:33,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:33,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:33,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:33,716 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 27 treesize of output 19 [2022-12-13 15:34:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:33,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:34,333 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:34:34,333 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 42 treesize of output 52 [2022-12-13 15:34:34,358 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:34,358 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 42 treesize of output 1 [2022-12-13 15:34:34,362 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:34,363 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 42 treesize of output 1 [2022-12-13 15:34:34,364 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:34,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116840816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:34,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:34,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:34:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320673135] [2022-12-13 15:34:34,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:34:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:34:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:34:35,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:35,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 620 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:35,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:35,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:35,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:36,042 INFO L130 PetriNetUnfolder]: 287/516 cut-off events. [2022-12-13 15:34:36,042 INFO L131 PetriNetUnfolder]: For 2630/2630 co-relation queries the response was YES. [2022-12-13 15:34:36,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 516 events. 287/516 cut-off events. For 2630/2630 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2057 event pairs, 42 based on Foata normal form. 1/517 useless extension candidates. Maximal degree in co-relation 2524. Up to 362 conditions per place. [2022-12-13 15:34:36,045 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 70 selfloop transitions, 26 changer transitions 2/98 dead transitions. [2022-12-13 15:34:36,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 988 flow [2022-12-13 15:34:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:34:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:34:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2569 transitions. [2022-12-13 15:34:36,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3843506882106523 [2022-12-13 15:34:36,049 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2569 transitions. [2022-12-13 15:34:36,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2569 transitions. [2022-12-13 15:34:36,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:36,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2569 transitions. [2022-12-13 15:34:36,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.08333333333334) internal successors, (2569), 12 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:36,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:36,056 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:36,056 INFO L175 Difference]: Start difference. First operand has 90 places, 70 transitions, 620 flow. Second operand 12 states and 2569 transitions. [2022-12-13 15:34:36,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 988 flow [2022-12-13 15:34:36,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 931 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-12-13 15:34:36,061 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 660 flow [2022-12-13 15:34:36,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=660, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2022-12-13 15:34:36,062 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 69 predicate places. [2022-12-13 15:34:36,062 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 660 flow [2022-12-13 15:34:36,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:36,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:36,063 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:36,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:34:36,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:34:36,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:36,266 INFO L85 PathProgramCache]: Analyzing trace with hash -501533106, now seen corresponding path program 5 times [2022-12-13 15:34:36,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732181809] [2022-12-13 15:34:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:36,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732181809] [2022-12-13 15:34:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732181809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905032828] [2022-12-13 15:34:36,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:34:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:36,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:36,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:34:36,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:34:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:37,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:37,085 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 27 treesize of output 19 [2022-12-13 15:34:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:37,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:37,629 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:34:37,629 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 42 treesize of output 52 [2022-12-13 15:34:37,654 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:37,655 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 42 treesize of output 1 [2022-12-13 15:34:37,660 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:37,661 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 42 treesize of output 1 [2022-12-13 15:34:37,662 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905032828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:37,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:37,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:34:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98610674] [2022-12-13 15:34:37,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:37,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:34:37,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:37,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:34:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:34:38,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:38,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 660 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:38,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:38,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:38,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:39,363 INFO L130 PetriNetUnfolder]: 293/531 cut-off events. [2022-12-13 15:34:39,363 INFO L131 PetriNetUnfolder]: For 2625/2625 co-relation queries the response was YES. [2022-12-13 15:34:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 531 events. 293/531 cut-off events. For 2625/2625 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2158 event pairs, 42 based on Foata normal form. 1/532 useless extension candidates. Maximal degree in co-relation 2634. Up to 381 conditions per place. [2022-12-13 15:34:39,366 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 74 selfloop transitions, 25 changer transitions 2/101 dead transitions. [2022-12-13 15:34:39,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 101 transitions, 1037 flow [2022-12-13 15:34:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:34:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:34:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2569 transitions. [2022-12-13 15:34:39,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3843506882106523 [2022-12-13 15:34:39,370 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2569 transitions. [2022-12-13 15:34:39,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2569 transitions. [2022-12-13 15:34:39,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:39,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2569 transitions. [2022-12-13 15:34:39,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.08333333333334) internal successors, (2569), 12 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:39,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:39,377 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:39,377 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 660 flow. Second operand 12 states and 2569 transitions. [2022-12-13 15:34:39,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 101 transitions, 1037 flow [2022-12-13 15:34:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 976 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-12-13 15:34:39,382 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 667 flow [2022-12-13 15:34:39,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=667, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2022-12-13 15:34:39,383 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 71 predicate places. [2022-12-13 15:34:39,383 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 667 flow [2022-12-13 15:34:39,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:39,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:39,383 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:39,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:34:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:34:39,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash -974118760, now seen corresponding path program 6 times [2022-12-13 15:34:39,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:39,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631018930] [2022-12-13 15:34:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:39,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:40,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631018930] [2022-12-13 15:34:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631018930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287540535] [2022-12-13 15:34:40,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:34:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:40,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:40,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:34:40,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:34:40,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:40,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:40,538 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 27 treesize of output 19 [2022-12-13 15:34:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:40,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:40,910 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-13 15:34:40,910 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 165 treesize of output 107 [2022-12-13 15:34:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:40,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287540535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:40,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:40,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-13 15:34:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230130619] [2022-12-13 15:34:40,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:34:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:34:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:34:41,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 557 [2022-12-13 15:34:41,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 667 flow. Second operand has 24 states, 24 states have (on average 210.04166666666666) internal successors, (5041), 24 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:41,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:41,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 557 [2022-12-13 15:34:41,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:42,629 INFO L130 PetriNetUnfolder]: 337/612 cut-off events. [2022-12-13 15:34:42,629 INFO L131 PetriNetUnfolder]: For 3423/3423 co-relation queries the response was YES. [2022-12-13 15:34:42,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 612 events. 337/612 cut-off events. For 3423/3423 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2609 event pairs, 66 based on Foata normal form. 7/619 useless extension candidates. Maximal degree in co-relation 3125. Up to 436 conditions per place. [2022-12-13 15:34:42,632 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 72 selfloop transitions, 33 changer transitions 6/111 dead transitions. [2022-12-13 15:34:42,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 1208 flow [2022-12-13 15:34:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:34:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:34:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2768 transitions. [2022-12-13 15:34:42,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38226764259080237 [2022-12-13 15:34:42,635 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2768 transitions. [2022-12-13 15:34:42,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2768 transitions. [2022-12-13 15:34:42,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:42,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2768 transitions. [2022-12-13 15:34:42,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.92307692307693) internal successors, (2768), 13 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:42,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:42,643 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:42,643 INFO L175 Difference]: Start difference. First operand has 94 places, 74 transitions, 667 flow. Second operand 13 states and 2768 transitions. [2022-12-13 15:34:42,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 1208 flow [2022-12-13 15:34:42,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 1144 flow, removed 1 selfloop flow, removed 10 redundant places. [2022-12-13 15:34:42,649 INFO L231 Difference]: Finished difference. Result has 101 places, 89 transitions, 928 flow [2022-12-13 15:34:42,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=928, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2022-12-13 15:34:42,650 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 78 predicate places. [2022-12-13 15:34:42,650 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 928 flow [2022-12-13 15:34:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 210.04166666666666) internal successors, (5041), 24 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:42,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:42,650 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 15:34:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:34:42,852 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1093082160, now seen corresponding path program 7 times [2022-12-13 15:34:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:42,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696089937] [2022-12-13 15:34:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:42,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696089937] [2022-12-13 15:34:43,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696089937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558374870] [2022-12-13 15:34:43,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:34:43,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:43,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:43,412 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:43,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:34:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:43,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:43,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:43,589 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 27 treesize of output 19 [2022-12-13 15:34:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:43,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:44,079 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:34:44,079 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 58 treesize of output 62 [2022-12-13 15:34:44,110 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:34:44,110 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 58 treesize of output 1 [2022-12-13 15:34:44,116 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:34:44,117 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 19 treesize of output 11 [2022-12-13 15:34:44,121 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:44,127 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:34:44,127 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 58 treesize of output 1 [2022-12-13 15:34:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:44,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558374870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:44,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:44,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:34:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270089611] [2022-12-13 15:34:44,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:44,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:34:44,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:34:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:34:45,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:45,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 928 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:45,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:45,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:45,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:45,905 INFO L130 PetriNetUnfolder]: 352/640 cut-off events. [2022-12-13 15:34:45,905 INFO L131 PetriNetUnfolder]: For 4530/4530 co-relation queries the response was YES. [2022-12-13 15:34:45,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3669 conditions, 640 events. 352/640 cut-off events. For 4530/4530 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2767 event pairs, 80 based on Foata normal form. 1/641 useless extension candidates. Maximal degree in co-relation 3574. Up to 468 conditions per place. [2022-12-13 15:34:45,909 INFO L137 encePairwiseOnDemand]: 547/557 looper letters, 82 selfloop transitions, 31 changer transitions 2/115 dead transitions. [2022-12-13 15:34:45,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 1359 flow [2022-12-13 15:34:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:34:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:34:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2566 transitions. [2022-12-13 15:34:45,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.383901855176541 [2022-12-13 15:34:45,912 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2566 transitions. [2022-12-13 15:34:45,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2566 transitions. [2022-12-13 15:34:45,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:45,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2566 transitions. [2022-12-13 15:34:45,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.83333333333334) internal successors, (2566), 12 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:45,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:45,918 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:45,918 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 928 flow. Second operand 12 states and 2566 transitions. [2022-12-13 15:34:45,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 1359 flow [2022-12-13 15:34:45,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 115 transitions, 1278 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-12-13 15:34:45,927 INFO L231 Difference]: Finished difference. Result has 111 places, 96 transitions, 1042 flow [2022-12-13 15:34:45,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1042, PETRI_PLACES=111, PETRI_TRANSITIONS=96} [2022-12-13 15:34:45,928 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 88 predicate places. [2022-12-13 15:34:45,928 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 96 transitions, 1042 flow [2022-12-13 15:34:45,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:45,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:45,928 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:45,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:34:46,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:46,130 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:46,131 INFO L85 PathProgramCache]: Analyzing trace with hash -191987764, now seen corresponding path program 8 times [2022-12-13 15:34:46,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:46,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427691444] [2022-12-13 15:34:46,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:46,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:46,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:46,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427691444] [2022-12-13 15:34:46,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427691444] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:46,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124841614] [2022-12-13 15:34:46,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:34:46,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:46,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:46,640 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:46,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:34:46,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:34:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:46,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:46,827 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 40 treesize of output 24 [2022-12-13 15:34:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:46,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:47,320 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:34:47,321 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 58 treesize of output 62 [2022-12-13 15:34:47,360 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:34:47,360 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 58 treesize of output 1 [2022-12-13 15:34:47,367 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:34:47,368 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 19 treesize of output 11 [2022-12-13 15:34:47,372 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:47,380 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:34:47,380 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 58 treesize of output 1 [2022-12-13 15:34:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:47,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124841614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:47,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:47,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:34:47,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908452194] [2022-12-13 15:34:47,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:47,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:34:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:34:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:34:48,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:48,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 96 transitions, 1042 flow. Second operand has 21 states, 21 states have (on average 211.1904761904762) internal successors, (4435), 21 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:48,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:48,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:48,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:49,262 INFO L130 PetriNetUnfolder]: 374/679 cut-off events. [2022-12-13 15:34:49,262 INFO L131 PetriNetUnfolder]: For 5391/5391 co-relation queries the response was YES. [2022-12-13 15:34:49,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 679 events. 374/679 cut-off events. For 5391/5391 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3004 event pairs, 84 based on Foata normal form. 1/680 useless extension candidates. Maximal degree in co-relation 3875. Up to 496 conditions per place. [2022-12-13 15:34:49,266 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 90 selfloop transitions, 34 changer transitions 3/127 dead transitions. [2022-12-13 15:34:49,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 127 transitions, 1518 flow [2022-12-13 15:34:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:34:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:34:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2573 transitions. [2022-12-13 15:34:49,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38494913225613403 [2022-12-13 15:34:49,269 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2573 transitions. [2022-12-13 15:34:49,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2573 transitions. [2022-12-13 15:34:49,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:49,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2573 transitions. [2022-12-13 15:34:49,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.41666666666666) internal successors, (2573), 12 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:49,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:49,274 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:49,274 INFO L175 Difference]: Start difference. First operand has 111 places, 96 transitions, 1042 flow. Second operand 12 states and 2573 transitions. [2022-12-13 15:34:49,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 127 transitions, 1518 flow [2022-12-13 15:34:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 127 transitions, 1464 flow, removed 18 selfloop flow, removed 5 redundant places. [2022-12-13 15:34:49,284 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 1202 flow [2022-12-13 15:34:49,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1202, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2022-12-13 15:34:49,284 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 97 predicate places. [2022-12-13 15:34:49,284 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 1202 flow [2022-12-13 15:34:49,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 211.1904761904762) internal successors, (4435), 21 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:49,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:49,285 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:49,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:34:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 15:34:49,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash 654399200, now seen corresponding path program 9 times [2022-12-13 15:34:49,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773487683] [2022-12-13 15:34:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:50,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773487683] [2022-12-13 15:34:50,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773487683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:50,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479844193] [2022-12-13 15:34:50,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:34:50,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:50,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:50,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:50,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:34:50,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:34:50,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:34:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:50,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:50,237 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 27 treesize of output 19 [2022-12-13 15:34:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:50,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:50,703 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:34:50,703 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 58 treesize of output 62 [2022-12-13 15:34:50,736 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:34:50,736 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 58 treesize of output 1 [2022-12-13 15:34:50,741 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:34:50,741 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 19 treesize of output 11 [2022-12-13 15:34:50,745 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:34:50,751 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:34:50,751 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 58 treesize of output 1 [2022-12-13 15:34:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:50,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479844193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:50,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:50,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:34:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531344594] [2022-12-13 15:34:50,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:50,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:34:50,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:34:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:34:51,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:34:51,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 1202 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:51,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:51,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:34:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:52,117 INFO L130 PetriNetUnfolder]: 380/694 cut-off events. [2022-12-13 15:34:52,117 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-12-13 15:34:52,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 694 events. 380/694 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3123 event pairs, 88 based on Foata normal form. 1/695 useless extension candidates. Maximal degree in co-relation 4185. Up to 496 conditions per place. [2022-12-13 15:34:52,121 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 91 selfloop transitions, 34 changer transitions 4/129 dead transitions. [2022-12-13 15:34:52,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 129 transitions, 1596 flow [2022-12-13 15:34:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:34:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:34:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2782 transitions. [2022-12-13 15:34:52,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38420107719928187 [2022-12-13 15:34:52,124 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2782 transitions. [2022-12-13 15:34:52,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2782 transitions. [2022-12-13 15:34:52,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:52,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2782 transitions. [2022-12-13 15:34:52,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.0) internal successors, (2782), 13 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:52,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:52,130 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:52,130 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 1202 flow. Second operand 13 states and 2782 transitions. [2022-12-13 15:34:52,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 129 transitions, 1596 flow [2022-12-13 15:34:52,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 129 transitions, 1472 flow, removed 43 selfloop flow, removed 7 redundant places. [2022-12-13 15:34:52,143 INFO L231 Difference]: Finished difference. Result has 126 places, 104 transitions, 1167 flow [2022-12-13 15:34:52,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1167, PETRI_PLACES=126, PETRI_TRANSITIONS=104} [2022-12-13 15:34:52,144 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 103 predicate places. [2022-12-13 15:34:52,144 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 104 transitions, 1167 flow [2022-12-13 15:34:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:52,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:52,145 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:52,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:34:52,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:34:52,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2051949448, now seen corresponding path program 10 times [2022-12-13 15:34:52,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:52,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623433807] [2022-12-13 15:34:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:52,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:52,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623433807] [2022-12-13 15:34:52,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623433807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845424844] [2022-12-13 15:34:52,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:34:52,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:52,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:52,944 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:34:53,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:34:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:34:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:34:53,189 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 [2022-12-13 15:34:53,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:53,246 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 40 treesize of output 24 [2022-12-13 15:34:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:53,766 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse0 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< .cse1 .cse0) (= (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (= (select (select .cse5 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset))))) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse8 (select .cse9 ~o_2~0.base))) (let ((.cse6 (select .cse8 c_~o_2~0.offset)) (.cse7 (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse6 .cse7) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse8 .cse3)) (= .cse6 .cse7)))))) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse10 (select .cse12 c_~o_2~0.offset))) (or (= .cse10 .cse11) (< .cse11 .cse10) (< (select .cse12 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))))) is different from false [2022-12-13 15:34:53,782 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:34:53,782 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 66 treesize of output 57 [2022-12-13 15:34:53,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:53,788 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 50 treesize of output 50 [2022-12-13 15:34:53,845 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:34:53,846 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 176 treesize of output 177 [2022-12-13 15:34:53,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:53,866 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 112 treesize of output 120 [2022-12-13 15:34:54,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:34:54,171 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:54,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:34:54,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:34:54,179 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:34:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:34:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:54,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845424844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:34:54,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:34:54,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 15:34:54,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182899234] [2022-12-13 15:34:54,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:34:54,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:34:54,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:34:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:34:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=707, Unknown=1, NotChecked=54, Total=870 [2022-12-13 15:34:54,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 557 [2022-12-13 15:34:54,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 104 transitions, 1167 flow. Second operand has 30 states, 30 states have (on average 189.83333333333334) internal successors, (5695), 30 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:54,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:54,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 557 [2022-12-13 15:34:54,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:57,477 INFO L130 PetriNetUnfolder]: 495/900 cut-off events. [2022-12-13 15:34:57,477 INFO L131 PetriNetUnfolder]: For 9073/9073 co-relation queries the response was YES. [2022-12-13 15:34:57,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5705 conditions, 900 events. 495/900 cut-off events. For 9073/9073 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4336 event pairs, 67 based on Foata normal form. 1/901 useless extension candidates. Maximal degree in co-relation 5602. Up to 318 conditions per place. [2022-12-13 15:34:57,482 INFO L137 encePairwiseOnDemand]: 544/557 looper letters, 101 selfloop transitions, 64 changer transitions 4/169 dead transitions. [2022-12-13 15:34:57,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 169 transitions, 2128 flow [2022-12-13 15:34:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:34:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:34:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2719 transitions. [2022-12-13 15:34:57,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3486791484996153 [2022-12-13 15:34:57,485 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2719 transitions. [2022-12-13 15:34:57,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2719 transitions. [2022-12-13 15:34:57,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:34:57,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2719 transitions. [2022-12-13 15:34:57,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.21428571428572) internal successors, (2719), 14 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:57,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:57,491 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:57,491 INFO L175 Difference]: Start difference. First operand has 126 places, 104 transitions, 1167 flow. Second operand 14 states and 2719 transitions. [2022-12-13 15:34:57,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 169 transitions, 2128 flow [2022-12-13 15:34:57,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 169 transitions, 2038 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-12-13 15:34:57,507 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 1605 flow [2022-12-13 15:34:57,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1605, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2022-12-13 15:34:57,508 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2022-12-13 15:34:57,508 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 1605 flow [2022-12-13 15:34:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 189.83333333333334) internal successors, (5695), 30 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:57,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:34:57,508 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:34:57,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:34:57,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:57,710 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:34:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:34:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash -816876876, now seen corresponding path program 11 times [2022-12-13 15:34:57,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:34:57,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977847650] [2022-12-13 15:34:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:34:57,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:34:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:34:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:34:58,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977847650] [2022-12-13 15:34:58,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977847650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:34:58,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973664929] [2022-12-13 15:34:58,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:34:58,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:34:58,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:34:58,447 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:34:58,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:34:58,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:34:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:34:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 15:34:58,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:34:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:34:58,619 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 15:34:58,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 15:34:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:34:58,688 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 15:34:58,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 15:34:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:34:59,032 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:34:59,032 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 20 treesize of output 25 [2022-12-13 15:34:59,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:59,089 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 27 treesize of output 19 [2022-12-13 15:34:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:34:59,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:34:59,397 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (= c_~result_5~0 0)) (.cse1 (< 0 c_~result_5~0))) (and (or (and (or (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (= (select (select .cse0 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset)))) .cse1) (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse2 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse2 .cse3) (< .cse2 .cse3))))) (or .cse5 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (< (select (select .cse6 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse6 c_~o_0~0.base) c_~o_0~0.offset)))))) (< c_~result_5~0 0)) (or .cse5 (and (or .cse1 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (< (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse9 (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset)) (.cse8 (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse8 .cse9) (< .cse9 .cse8))))))) (or .cse1 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse12 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse11 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset))) (or (= .cse11 .cse12) (< .cse12 .cse11)))))))) is different from false [2022-12-13 15:34:59,532 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (= (select (select .cse18 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse18 c_~o_0~0.base) c_~o_0~0.offset))))) (.cse5 (< 0 c_~result_5~0)) (.cse1 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse15 (select (select .cse17 c_~o_2~0.base) c_~o_2~0.offset)) (.cse16 (select (select .cse17 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse15 .cse16) (< .cse15 .cse16)))))) (.cse9 (= c_~result_5~0 0))) (let ((.cse0 (or (and (or .cse3 .cse5) .cse1 (or .cse9 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (< (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset)))))) (< c_~result_5~0 0))) (.cse2 (or .cse9 (and (or .cse5 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (< (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse12 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset)) (.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse11 .cse12) (< .cse12 .cse11)))))))) (.cse4 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse7 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset)) (.cse6 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset))) (or (= .cse6 .cse7) (< .cse7 .cse6))))))) (and .cse0 (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (< |c_thread1Thread1of1ForFork0_~i~0#1| 5)) .cse2 (or .cse5 .cse4)))) is different from false [2022-12-13 15:34:59,637 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (select (select |c_#memory_int| c_~o_2~0.base) (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (let ((.cse10 (= .cse12 |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (.cse2 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse19 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse17 (select (select .cse19 c_~o_2~0.base) c_~o_2~0.offset)) (.cse18 (select (select .cse19 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse17 .cse18) (< .cse17 .cse18)))))) (.cse0 (< .cse12 |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (.cse5 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (= (select (select .cse16 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse16 c_~o_0~0.base) c_~o_0~0.offset)))))) (let ((.cse1 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse14 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (.cse13 (select (select .cse15 c_~o_2~0.base) c_~o_2~0.offset))) (or (= .cse13 .cse14) (< .cse14 .cse13)))))) (.cse3 (or (and (or .cse10 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (< (select (select .cse11 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset))))) .cse2 (or .cse0 .cse5)) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| .cse12))) (.cse4 (or (and (or .cse0 (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (< (select (select .cse6 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse6 c_~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1154 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1154))) (let ((.cse8 (select (select .cse9 c_~o_2~0.base) c_~o_2~0.offset)) (.cse7 (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse7 .cse8) (< .cse8 .cse7)))))) .cse10))) (and (or .cse0 .cse1) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (and .cse2 .cse3 .cse4 .cse5 .cse1)) .cse3 .cse4)))) is different from false [2022-12-13 15:34:59,678 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:34:59,679 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 131 treesize of output 106 [2022-12-13 15:34:59,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:59,689 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 99 treesize of output 91 [2022-12-13 15:34:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:34:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:34:59,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 132 [2022-12-13 15:34:59,734 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-13 15:34:59,744 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 52 [2022-12-13 15:34:59,755 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2022-12-13 15:34:59,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-13 15:34:59,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:34:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:34:59,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 1 [2022-12-13 15:34:59,774 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 85 [2022-12-13 15:34:59,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 52 [2022-12-13 15:34:59,861 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:34:59,861 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 322 treesize of output 267 [2022-12-13 15:34:59,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:59,883 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 206 treesize of output 207 [2022-12-13 15:34:59,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:59,900 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 198 treesize of output 199 [2022-12-13 15:34:59,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:34:59,917 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 190 treesize of output 183 [2022-12-13 15:35:00,752 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:00,752 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 237 treesize of output 1 [2022-12-13 15:35:00,769 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:00,769 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 150 treesize of output 1 [2022-12-13 15:35:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 1 not checked. [2022-12-13 15:35:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973664929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:01,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:01,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 15:35:01,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796614683] [2022-12-13 15:35:01,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:01,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:35:01,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:35:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=870, Unknown=3, NotChecked=186, Total=1190 [2022-12-13 15:35:01,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 557 [2022-12-13 15:35:01,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 1605 flow. Second operand has 35 states, 35 states have (on average 180.71428571428572) internal successors, (6325), 35 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:01,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:01,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 557 [2022-12-13 15:35:01,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:03,706 INFO L130 PetriNetUnfolder]: 557/1024 cut-off events. [2022-12-13 15:35:03,707 INFO L131 PetriNetUnfolder]: For 13576/13576 co-relation queries the response was YES. [2022-12-13 15:35:03,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 1024 events. 557/1024 cut-off events. For 13576/13576 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5247 event pairs, 55 based on Foata normal form. 19/1043 useless extension candidates. Maximal degree in co-relation 7130. Up to 340 conditions per place. [2022-12-13 15:35:03,714 INFO L137 encePairwiseOnDemand]: 544/557 looper letters, 101 selfloop transitions, 72 changer transitions 22/195 dead transitions. [2022-12-13 15:35:03,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 195 transitions, 2716 flow [2022-12-13 15:35:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:35:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:35:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2949 transitions. [2022-12-13 15:35:03,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33090215439856374 [2022-12-13 15:35:03,717 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2949 transitions. [2022-12-13 15:35:03,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2949 transitions. [2022-12-13 15:35:03,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:03,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2949 transitions. [2022-12-13 15:35:03,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.3125) internal successors, (2949), 16 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:03,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:03,725 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:03,725 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 1605 flow. Second operand 16 states and 2949 transitions. [2022-12-13 15:35:03,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 195 transitions, 2716 flow [2022-12-13 15:35:03,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 195 transitions, 2592 flow, removed 45 selfloop flow, removed 6 redundant places. [2022-12-13 15:35:03,754 INFO L231 Difference]: Finished difference. Result has 148 places, 136 transitions, 1879 flow [2022-12-13 15:35:03,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1879, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2022-12-13 15:35:03,754 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 125 predicate places. [2022-12-13 15:35:03,754 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 1879 flow [2022-12-13 15:35:03,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 180.71428571428572) internal successors, (6325), 35 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:03,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:03,755 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:03,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 15:35:03,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:03,956 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2047955606, now seen corresponding path program 12 times [2022-12-13 15:35:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:03,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727295158] [2022-12-13 15:35:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:03,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:04,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727295158] [2022-12-13 15:35:04,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727295158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032394301] [2022-12-13 15:35:04,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:35:04,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:04,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:04,571 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:04,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:35:04,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:35:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:35:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:04,834 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 [2022-12-13 15:35:04,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:04,892 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 40 treesize of output 24 [2022-12-13 15:35:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:04,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:05,574 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1225 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1225))) (let ((.cse0 (select .cse4 ~o_2~0.base))) (let ((.cse2 (select .cse0 c_~o_2~0.offset)) (.cse3 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse0 .cse1)) (= .cse2 .cse3) (< .cse2 .cse3)))))) (forall ((v_ArrVal_1225 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1225))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse6 (select .cse7 c_~o_2~0.offset)) (.cse5 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse5 .cse6) (= (select .cse7 .cse1) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse6 .cse5)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1225 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1225))) (= (select (select .cse9 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset))))) (forall ((v_ArrVal_1225 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1225))) (let ((.cse10 (select .cse13 ~o_2~0.base))) (let ((.cse12 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse11 (select .cse10 c_~o_2~0.offset))) (or (< (select .cse10 .cse1) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (= .cse11 .cse12) (< .cse12 .cse11)))))))) is different from false [2022-12-13 15:35:05,639 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:35:05,639 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 176 treesize of output 177 [2022-12-13 15:35:05,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:05,671 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 112 treesize of output 120 [2022-12-13 15:35:05,955 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:35:05,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:05,962 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:05,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:05,969 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:05,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:06,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032394301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:06,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-12-13 15:35:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953839187] [2022-12-13 15:35:06,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 15:35:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 15:35:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=751, Unknown=1, NotChecked=56, Total=930 [2022-12-13 15:35:06,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 557 [2022-12-13 15:35:06,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 1879 flow. Second operand has 31 states, 31 states have (on average 189.80645161290323) internal successors, (5884), 31 states have internal predecessors, (5884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:06,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:06,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 557 [2022-12-13 15:35:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:07,161 INFO L130 PetriNetUnfolder]: 556/1036 cut-off events. [2022-12-13 15:35:07,161 INFO L131 PetriNetUnfolder]: For 16904/16904 co-relation queries the response was YES. [2022-12-13 15:35:07,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7982 conditions, 1036 events. 556/1036 cut-off events. For 16904/16904 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5368 event pairs, 89 based on Foata normal form. 1/1037 useless extension candidates. Maximal degree in co-relation 7867. Up to 774 conditions per place. [2022-12-13 15:35:07,168 INFO L137 encePairwiseOnDemand]: 543/557 looper letters, 125 selfloop transitions, 58 changer transitions 5/188 dead transitions. [2022-12-13 15:35:07,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 188 transitions, 2829 flow [2022-12-13 15:35:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:35:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:35:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2707 transitions. [2022-12-13 15:35:07,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3471402923826622 [2022-12-13 15:35:07,171 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2707 transitions. [2022-12-13 15:35:07,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2707 transitions. [2022-12-13 15:35:07,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:07,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2707 transitions. [2022-12-13 15:35:07,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.35714285714286) internal successors, (2707), 14 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:07,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:07,177 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:07,177 INFO L175 Difference]: Start difference. First operand has 148 places, 136 transitions, 1879 flow. Second operand 14 states and 2707 transitions. [2022-12-13 15:35:07,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 188 transitions, 2829 flow [2022-12-13 15:35:07,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 188 transitions, 2671 flow, removed 60 selfloop flow, removed 9 redundant places. [2022-12-13 15:35:07,211 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 2146 flow [2022-12-13 15:35:07,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2146, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2022-12-13 15:35:07,211 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 132 predicate places. [2022-12-13 15:35:07,211 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 2146 flow [2022-12-13 15:35:07,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 189.80645161290323) internal successors, (5884), 31 states have internal predecessors, (5884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:07,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:07,212 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:07,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:35:07,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 15:35:07,413 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1370297780, now seen corresponding path program 13 times [2022-12-13 15:35:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:07,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354958252] [2022-12-13 15:35:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:08,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354958252] [2022-12-13 15:35:08,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354958252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854501032] [2022-12-13 15:35:08,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:35:08,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:08,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:08,011 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:08,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:35:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:35:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:08,252 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 [2022-12-13 15:35:08,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:08,356 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 27 treesize of output 19 [2022-12-13 15:35:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:08,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:09,098 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1296 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1296))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select .cse2 c_~o_2~0.offset)) (.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse0 .cse1) (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse2 .cse3)) (< .cse1 .cse0)))))) (forall ((v_ArrVal_1296 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1296))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse6 (select .cse7 c_~o_2~0.offset)) (.cse5 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse5 .cse6) (< .cse6 .cse5) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse7 .cse3))))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1296 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1296))) (= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse9 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1296 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1296))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse10 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse11 (select .cse12 c_~o_2~0.offset))) (or (< .cse10 .cse11) (< (select .cse12 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (= .cse10 .cse11)))))))) is different from false [2022-12-13 15:35:09,114 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:35:09,114 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 66 treesize of output 57 [2022-12-13 15:35:09,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:09,122 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 50 treesize of output 50 [2022-12-13 15:35:09,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:09,180 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 176 treesize of output 192 [2022-12-13 15:35:09,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:09,203 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 112 treesize of output 120 [2022-12-13 15:35:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:09,938 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:09,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:09,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:09,946 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:09,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854501032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:10,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-12-13 15:35:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474387590] [2022-12-13 15:35:10,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:35:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:35:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=821, Unknown=1, NotChecked=58, Total=992 [2022-12-13 15:35:10,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 557 [2022-12-13 15:35:10,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 2146 flow. Second operand has 32 states, 32 states have (on average 189.78125) internal successors, (6073), 32 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:10,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:10,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 557 [2022-12-13 15:35:10,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:11,358 INFO L130 PetriNetUnfolder]: 578/1075 cut-off events. [2022-12-13 15:35:11,358 INFO L131 PetriNetUnfolder]: For 16813/16813 co-relation queries the response was YES. [2022-12-13 15:35:11,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8445 conditions, 1075 events. 578/1075 cut-off events. For 16813/16813 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5611 event pairs, 107 based on Foata normal form. 1/1076 useless extension candidates. Maximal degree in co-relation 8328. Up to 850 conditions per place. [2022-12-13 15:35:11,366 INFO L137 encePairwiseOnDemand]: 544/557 looper letters, 125 selfloop transitions, 60 changer transitions 6/191 dead transitions. [2022-12-13 15:35:11,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 191 transitions, 2948 flow [2022-12-13 15:35:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:35:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:35:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2705 transitions. [2022-12-13 15:35:11,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34688381636317006 [2022-12-13 15:35:11,369 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2705 transitions. [2022-12-13 15:35:11,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2705 transitions. [2022-12-13 15:35:11,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:11,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2705 transitions. [2022-12-13 15:35:11,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.21428571428572) internal successors, (2705), 14 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:11,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:11,375 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:11,375 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 2146 flow. Second operand 14 states and 2705 transitions. [2022-12-13 15:35:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 191 transitions, 2948 flow [2022-12-13 15:35:11,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 191 transitions, 2824 flow, removed 31 selfloop flow, removed 8 redundant places. [2022-12-13 15:35:11,420 INFO L231 Difference]: Finished difference. Result has 164 places, 161 transitions, 2333 flow [2022-12-13 15:35:11,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2333, PETRI_PLACES=164, PETRI_TRANSITIONS=161} [2022-12-13 15:35:11,420 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 141 predicate places. [2022-12-13 15:35:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 161 transitions, 2333 flow [2022-12-13 15:35:11,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 189.78125) internal successors, (6073), 32 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:11,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:11,421 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:11,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:35:11,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:11,622 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 499530330, now seen corresponding path program 14 times [2022-12-13 15:35:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247729339] [2022-12-13 15:35:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:12,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247729339] [2022-12-13 15:35:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247729339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908841525] [2022-12-13 15:35:12,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:35:12,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:12,358 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:12,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:35:12,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:35:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:35:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:12,629 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 [2022-12-13 15:35:12,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:12,703 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 27 treesize of output 19 [2022-12-13 15:35:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:12,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:13,319 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (or (forall ((v_ArrVal_1367 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1367))) (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (forall ((v_ArrVal_1367 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1367))) (let ((.cse3 (select .cse5 ~o_2~0.base))) (let ((.cse2 (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset)) (.cse1 (select .cse3 c_~o_2~0.offset))) (or (< .cse1 .cse2) (< .cse2 .cse1) (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse3 .cse4))))))) (forall ((v_ArrVal_1367 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1367))) (let ((.cse8 (select .cse9 ~o_2~0.base))) (let ((.cse7 (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset)) (.cse6 (select .cse8 c_~o_2~0.offset))) (or (< .cse6 .cse7) (= .cse7 .cse6) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse8 .cse4))))))) (forall ((v_ArrVal_1367 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1367))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse10 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse11 (select .cse12 c_~o_2~0.offset))) (or (< .cse10 .cse11) (= .cse10 .cse11) (< (select .cse12 .cse4) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))))) is different from false [2022-12-13 15:35:13,372 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:35:13,372 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 176 treesize of output 177 [2022-12-13 15:35:13,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:13,389 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 112 treesize of output 120 [2022-12-13 15:35:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:13,850 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:13,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:13,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:13,852 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:35:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:13,858 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:13,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:13,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908841525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:13,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:13,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-12-13 15:35:13,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851693386] [2022-12-13 15:35:13,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:13,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:35:13,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:13,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:35:13,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=817, Unknown=1, NotChecked=58, Total=992 [2022-12-13 15:35:14,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 557 [2022-12-13 15:35:14,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 161 transitions, 2333 flow. Second operand has 32 states, 32 states have (on average 189.78125) internal successors, (6073), 32 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:14,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:14,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 557 [2022-12-13 15:35:14,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:16,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:17,209 INFO L130 PetriNetUnfolder]: 581/1087 cut-off events. [2022-12-13 15:35:17,209 INFO L131 PetriNetUnfolder]: For 18359/18359 co-relation queries the response was YES. [2022-12-13 15:35:17,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8699 conditions, 1087 events. 581/1087 cut-off events. For 18359/18359 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5723 event pairs, 113 based on Foata normal form. 1/1088 useless extension candidates. Maximal degree in co-relation 8578. Up to 826 conditions per place. [2022-12-13 15:35:17,217 INFO L137 encePairwiseOnDemand]: 544/557 looper letters, 125 selfloop transitions, 60 changer transitions 6/191 dead transitions. [2022-12-13 15:35:17,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 191 transitions, 3006 flow [2022-12-13 15:35:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:35:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:35:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2516 transitions. [2022-12-13 15:35:17,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3474658196381715 [2022-12-13 15:35:17,227 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2516 transitions. [2022-12-13 15:35:17,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2516 transitions. [2022-12-13 15:35:17,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:17,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2516 transitions. [2022-12-13 15:35:17,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.53846153846155) internal successors, (2516), 13 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:17,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:17,232 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:17,232 INFO L175 Difference]: Start difference. First operand has 164 places, 161 transitions, 2333 flow. Second operand 13 states and 2516 transitions. [2022-12-13 15:35:17,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 191 transitions, 3006 flow [2022-12-13 15:35:17,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 191 transitions, 2892 flow, removed 33 selfloop flow, removed 7 redundant places. [2022-12-13 15:35:17,272 INFO L231 Difference]: Finished difference. Result has 170 places, 162 transitions, 2360 flow [2022-12-13 15:35:17,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2360, PETRI_PLACES=170, PETRI_TRANSITIONS=162} [2022-12-13 15:35:17,273 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 147 predicate places. [2022-12-13 15:35:17,273 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 162 transitions, 2360 flow [2022-12-13 15:35:17,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 189.78125) internal successors, (6073), 32 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:17,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:17,274 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:17,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:35:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:17,475 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash -466177950, now seen corresponding path program 15 times [2022-12-13 15:35:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:17,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930606421] [2022-12-13 15:35:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:17,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:18,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930606421] [2022-12-13 15:35:18,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930606421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327735886] [2022-12-13 15:35:18,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:35:18,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:18,100 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:18,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:35:18,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:35:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:35:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:18,327 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 [2022-12-13 15:35:18,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:18,415 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 40 treesize of output 24 [2022-12-13 15:35:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:18,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:19,157 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1438 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1438))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse0 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< .cse1 .cse0) (= (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))) (forall ((v_ArrVal_1438 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1438))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse5 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset)) (.cse6 (select .cse7 c_~o_2~0.offset))) (or (< .cse5 .cse6) (< (select .cse7 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (= .cse5 .cse6)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1438 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1438))) (= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse9 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1438 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1438))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse10 (select .cse12 c_~o_2~0.offset))) (or (< .cse10 .cse11) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse12 .cse3)) (= .cse11 .cse10)))))))) is different from false [2022-12-13 15:35:19,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:19,193 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 176 treesize of output 192 [2022-12-13 15:35:19,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:19,214 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 112 treesize of output 120 [2022-12-13 15:35:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:20,120 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:20,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:20,122 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:35:20,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:20,129 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:20,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:20,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327735886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:20,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:20,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 15:35:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119088032] [2022-12-13 15:35:20,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:35:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:35:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=710, Unknown=1, NotChecked=54, Total=870 [2022-12-13 15:35:20,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 557 [2022-12-13 15:35:20,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 162 transitions, 2360 flow. Second operand has 30 states, 30 states have (on average 189.8) internal successors, (5694), 30 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:20,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:20,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 557 [2022-12-13 15:35:20,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:22,186 INFO L130 PetriNetUnfolder]: 597/1123 cut-off events. [2022-12-13 15:35:22,186 INFO L131 PetriNetUnfolder]: For 18388/18388 co-relation queries the response was YES. [2022-12-13 15:35:22,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8988 conditions, 1123 events. 597/1123 cut-off events. For 18388/18388 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6022 event pairs, 103 based on Foata normal form. 1/1124 useless extension candidates. Maximal degree in co-relation 8866. Up to 850 conditions per place. [2022-12-13 15:35:22,194 INFO L137 encePairwiseOnDemand]: 543/557 looper letters, 125 selfloop transitions, 73 changer transitions 5/203 dead transitions. [2022-12-13 15:35:22,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 203 transitions, 3228 flow [2022-12-13 15:35:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:35:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:35:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2708 transitions. [2022-12-13 15:35:22,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3472685303924083 [2022-12-13 15:35:22,197 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2708 transitions. [2022-12-13 15:35:22,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2708 transitions. [2022-12-13 15:35:22,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:22,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2708 transitions. [2022-12-13 15:35:22,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.42857142857142) internal successors, (2708), 14 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:22,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:22,203 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:22,203 INFO L175 Difference]: Start difference. First operand has 170 places, 162 transitions, 2360 flow. Second operand 14 states and 2708 transitions. [2022-12-13 15:35:22,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 203 transitions, 3228 flow [2022-12-13 15:35:22,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 203 transitions, 3104 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-12-13 15:35:22,243 INFO L231 Difference]: Finished difference. Result has 175 places, 172 transitions, 2612 flow [2022-12-13 15:35:22,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2612, PETRI_PLACES=175, PETRI_TRANSITIONS=172} [2022-12-13 15:35:22,243 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 152 predicate places. [2022-12-13 15:35:22,243 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 172 transitions, 2612 flow [2022-12-13 15:35:22,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 189.8) internal successors, (5694), 30 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:22,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:22,244 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:22,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:35:22,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 15:35:22,445 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -8859098, now seen corresponding path program 16 times [2022-12-13 15:35:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:22,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062638533] [2022-12-13 15:35:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:23,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062638533] [2022-12-13 15:35:23,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062638533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029000557] [2022-12-13 15:35:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:35:23,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:23,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:23,071 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:23,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:35:23,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:35:23,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:35:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:23,340 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 [2022-12-13 15:35:23,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:23,423 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 27 treesize of output 19 [2022-12-13 15:35:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:24,227 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1509 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1509))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select .cse2 c_~o_2~0.offset)) (.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse0 .cse1) (< .cse1 .cse0) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse2 .cse3))))))) (forall ((v_ArrVal_1509 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1509))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse5 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset)) (.cse6 (select .cse7 c_~o_2~0.offset))) (or (= .cse5 .cse6) (< (select .cse7 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse5 .cse6)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1509 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1509))) (= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse9 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1509 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1509))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse10 (select .cse12 c_~o_2~0.offset))) (or (< .cse10 .cse11) (< .cse11 .cse10) (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse12 .cse3))))))))) is different from false [2022-12-13 15:35:24,293 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:35:24,293 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 176 treesize of output 177 [2022-12-13 15:35:24,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:24,316 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 112 treesize of output 120 [2022-12-13 15:35:24,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:24,776 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:24,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:24,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:24,779 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:35:24,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:35:24,786 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-13 15:35:24,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-13 15:35:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:24,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029000557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:24,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:24,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-12-13 15:35:24,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988507272] [2022-12-13 15:35:24,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:24,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:35:24,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:35:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=807, Unknown=1, NotChecked=58, Total=992 [2022-12-13 15:35:24,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 557 [2022-12-13 15:35:24,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 172 transitions, 2612 flow. Second operand has 32 states, 32 states have (on average 189.78125) internal successors, (6073), 32 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:24,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:24,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 557 [2022-12-13 15:35:24,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:26,405 INFO L130 PetriNetUnfolder]: 631/1207 cut-off events. [2022-12-13 15:35:26,406 INFO L131 PetriNetUnfolder]: For 22600/22600 co-relation queries the response was YES. [2022-12-13 15:35:26,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10197 conditions, 1207 events. 631/1207 cut-off events. For 22600/22600 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6752 event pairs, 112 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 10071. Up to 885 conditions per place. [2022-12-13 15:35:26,414 INFO L137 encePairwiseOnDemand]: 542/557 looper letters, 146 selfloop transitions, 89 changer transitions 5/240 dead transitions. [2022-12-13 15:35:26,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 240 transitions, 4157 flow [2022-12-13 15:35:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:35:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:35:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2897 transitions. [2022-12-13 15:35:26,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3467384799521245 [2022-12-13 15:35:26,417 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2897 transitions. [2022-12-13 15:35:26,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2897 transitions. [2022-12-13 15:35:26,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:26,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2897 transitions. [2022-12-13 15:35:26,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 193.13333333333333) internal successors, (2897), 15 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:26,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 557.0) internal successors, (8912), 16 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:26,423 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 557.0) internal successors, (8912), 16 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:26,423 INFO L175 Difference]: Start difference. First operand has 175 places, 172 transitions, 2612 flow. Second operand 15 states and 2897 transitions. [2022-12-13 15:35:26,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 240 transitions, 4157 flow [2022-12-13 15:35:26,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 240 transitions, 3919 flow, removed 71 selfloop flow, removed 9 redundant places. [2022-12-13 15:35:26,486 INFO L231 Difference]: Finished difference. Result has 185 places, 204 transitions, 3363 flow [2022-12-13 15:35:26,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3363, PETRI_PLACES=185, PETRI_TRANSITIONS=204} [2022-12-13 15:35:26,487 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 162 predicate places. [2022-12-13 15:35:26,487 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 204 transitions, 3363 flow [2022-12-13 15:35:26,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 189.78125) internal successors, (6073), 32 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:26,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:26,488 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:26,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:35:26,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:26,689 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash -17915158, now seen corresponding path program 17 times [2022-12-13 15:35:26,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926366276] [2022-12-13 15:35:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:26,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:27,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926366276] [2022-12-13 15:35:27,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926366276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385052221] [2022-12-13 15:35:27,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:35:27,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:27,290 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:35:27,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:35:27,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:35:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:27,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:27,587 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 27 treesize of output 19 [2022-12-13 15:35:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:27,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:27,988 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-13 15:35:27,988 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 165 treesize of output 107 [2022-12-13 15:35:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:28,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385052221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:28,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:28,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-13 15:35:28,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592142092] [2022-12-13 15:35:28,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:28,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:35:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:28,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:35:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:35:29,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:35:29,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 204 transitions, 3363 flow. Second operand has 24 states, 24 states have (on average 211.04166666666666) internal successors, (5065), 24 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:29,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:29,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:35:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:30,354 INFO L130 PetriNetUnfolder]: 674/1276 cut-off events. [2022-12-13 15:35:30,354 INFO L131 PetriNetUnfolder]: For 25700/25700 co-relation queries the response was YES. [2022-12-13 15:35:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11349 conditions, 1276 events. 674/1276 cut-off events. For 25700/25700 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7173 event pairs, 221 based on Foata normal form. 1/1277 useless extension candidates. Maximal degree in co-relation 11217. Up to 1057 conditions per place. [2022-12-13 15:35:30,363 INFO L137 encePairwiseOnDemand]: 547/557 looper letters, 192 selfloop transitions, 64 changer transitions 4/260 dead transitions. [2022-12-13 15:35:30,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 260 transitions, 4759 flow [2022-12-13 15:35:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:35:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:35:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2994 transitions. [2022-12-13 15:35:30,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3839446011797897 [2022-12-13 15:35:30,365 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2994 transitions. [2022-12-13 15:35:30,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2994 transitions. [2022-12-13 15:35:30,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:30,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2994 transitions. [2022-12-13 15:35:30,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 213.85714285714286) internal successors, (2994), 14 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:30,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:30,372 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:30,372 INFO L175 Difference]: Start difference. First operand has 185 places, 204 transitions, 3363 flow. Second operand 14 states and 2994 transitions. [2022-12-13 15:35:30,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 260 transitions, 4759 flow [2022-12-13 15:35:30,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 260 transitions, 4586 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-12-13 15:35:30,426 INFO L231 Difference]: Finished difference. Result has 192 places, 228 transitions, 3946 flow [2022-12-13 15:35:30,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3946, PETRI_PLACES=192, PETRI_TRANSITIONS=228} [2022-12-13 15:35:30,426 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 169 predicate places. [2022-12-13 15:35:30,426 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 228 transitions, 3946 flow [2022-12-13 15:35:30,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 211.04166666666666) internal successors, (5065), 24 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:30,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:30,427 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:30,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:35:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:35:30,628 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1071219750, now seen corresponding path program 18 times [2022-12-13 15:35:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:30,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491141387] [2022-12-13 15:35:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:31,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491141387] [2022-12-13 15:35:31,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491141387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296231351] [2022-12-13 15:35:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:35:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:31,126 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:31,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:35:31,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:35:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:35:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:31,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:31,373 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 40 treesize of output 24 [2022-12-13 15:35:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:31,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:31,905 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:35:31,905 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 110 treesize of output 73 [2022-12-13 15:35:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:31,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296231351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:31,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:31,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:35:31,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273094266] [2022-12-13 15:35:31,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:31,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:35:31,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:31,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:35:31,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:35:32,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:35:32,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 228 transitions, 3946 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:32,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:32,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:35:32,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:33,853 INFO L130 PetriNetUnfolder]: 761/1432 cut-off events. [2022-12-13 15:35:33,854 INFO L131 PetriNetUnfolder]: For 32953/32953 co-relation queries the response was YES. [2022-12-13 15:35:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13318 conditions, 1432 events. 761/1432 cut-off events. For 32953/32953 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8174 event pairs, 133 based on Foata normal form. 1/1433 useless extension candidates. Maximal degree in co-relation 13183. Up to 640 conditions per place. [2022-12-13 15:35:33,864 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 192 selfloop transitions, 87 changer transitions 2/281 dead transitions. [2022-12-13 15:35:33,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 281 transitions, 5353 flow [2022-12-13 15:35:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:35:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:35:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2784 transitions. [2022-12-13 15:35:33,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38447728214335036 [2022-12-13 15:35:33,867 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2784 transitions. [2022-12-13 15:35:33,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2784 transitions. [2022-12-13 15:35:33,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:33,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2784 transitions. [2022-12-13 15:35:33,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.15384615384616) internal successors, (2784), 13 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:33,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:33,873 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:33,884 INFO L175 Difference]: Start difference. First operand has 192 places, 228 transitions, 3946 flow. Second operand 13 states and 2784 transitions. [2022-12-13 15:35:33,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 281 transitions, 5353 flow [2022-12-13 15:35:33,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 281 transitions, 5218 flow, removed 63 selfloop flow, removed 4 redundant places. [2022-12-13 15:35:33,970 INFO L231 Difference]: Finished difference. Result has 205 places, 241 transitions, 4420 flow [2022-12-13 15:35:33,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4420, PETRI_PLACES=205, PETRI_TRANSITIONS=241} [2022-12-13 15:35:33,970 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2022-12-13 15:35:33,970 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 241 transitions, 4420 flow [2022-12-13 15:35:33,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:33,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:33,971 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:33,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 15:35:34,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:35:34,172 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:34,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash -547598536, now seen corresponding path program 19 times [2022-12-13 15:35:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:34,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290657867] [2022-12-13 15:35:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:34,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290657867] [2022-12-13 15:35:34,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290657867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688645215] [2022-12-13 15:35:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:35:34,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:34,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:34,771 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:34,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:35:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:35:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:34,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:34,989 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 27 treesize of output 19 [2022-12-13 15:35:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:35,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:35,388 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-13 15:35:35,388 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 165 treesize of output 107 [2022-12-13 15:35:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:35,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688645215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:35,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:35,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-13 15:35:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663473948] [2022-12-13 15:35:35,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:35,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:35:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:35:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:35:36,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:35:36,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 241 transitions, 4420 flow. Second operand has 24 states, 24 states have (on average 211.04166666666666) internal successors, (5065), 24 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:36,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:36,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:35:36,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:37,621 INFO L130 PetriNetUnfolder]: 764/1444 cut-off events. [2022-12-13 15:35:37,622 INFO L131 PetriNetUnfolder]: For 35005/35005 co-relation queries the response was YES. [2022-12-13 15:35:37,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13775 conditions, 1444 events. 764/1444 cut-off events. For 35005/35005 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 8308 event pairs, 258 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 13635. Up to 1207 conditions per place. [2022-12-13 15:35:37,632 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 203 selfloop transitions, 64 changer transitions 2/269 dead transitions. [2022-12-13 15:35:37,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 269 transitions, 5264 flow [2022-12-13 15:35:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:35:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:35:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2778 transitions. [2022-12-13 15:35:37,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3836486673111449 [2022-12-13 15:35:37,635 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2778 transitions. [2022-12-13 15:35:37,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2778 transitions. [2022-12-13 15:35:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:37,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2778 transitions. [2022-12-13 15:35:37,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 213.69230769230768) internal successors, (2778), 13 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:37,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:37,640 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:37,641 INFO L175 Difference]: Start difference. First operand has 205 places, 241 transitions, 4420 flow. Second operand 13 states and 2778 transitions. [2022-12-13 15:35:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 269 transitions, 5264 flow [2022-12-13 15:35:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 269 transitions, 5152 flow, removed 33 selfloop flow, removed 6 redundant places. [2022-12-13 15:35:37,724 INFO L231 Difference]: Finished difference. Result has 213 places, 244 transitions, 4519 flow [2022-12-13 15:35:37,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4519, PETRI_PLACES=213, PETRI_TRANSITIONS=244} [2022-12-13 15:35:37,725 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2022-12-13 15:35:37,725 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 244 transitions, 4519 flow [2022-12-13 15:35:37,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 211.04166666666666) internal successors, (5065), 24 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:37,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:37,726 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:37,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 15:35:37,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:35:37,926 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:37,926 INFO L85 PathProgramCache]: Analyzing trace with hash -49076024, now seen corresponding path program 20 times [2022-12-13 15:35:37,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:37,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569785103] [2022-12-13 15:35:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:37,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569785103] [2022-12-13 15:35:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569785103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127118544] [2022-12-13 15:35:38,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:35:38,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:38,469 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:38,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:35:38,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:35:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:35:38,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:38,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:38,705 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 27 treesize of output 19 [2022-12-13 15:35:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:38,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:39,207 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:35:39,207 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 58 treesize of output 62 [2022-12-13 15:35:39,231 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:35:39,231 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 58 treesize of output 1 [2022-12-13 15:35:39,238 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:35:39,238 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 19 treesize of output 11 [2022-12-13 15:35:39,241 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:35:39,248 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:35:39,248 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 58 treesize of output 1 [2022-12-13 15:35:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:39,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127118544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:39,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:39,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:35:39,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480712648] [2022-12-13 15:35:39,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:39,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:35:39,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:35:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:35:40,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:35:40,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 244 transitions, 4519 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:40,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:40,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:35:40,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:41,029 INFO L130 PetriNetUnfolder]: 792/1498 cut-off events. [2022-12-13 15:35:41,029 INFO L131 PetriNetUnfolder]: For 38509/38509 co-relation queries the response was YES. [2022-12-13 15:35:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14523 conditions, 1498 events. 792/1498 cut-off events. For 38509/38509 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 8729 event pairs, 266 based on Foata normal form. 2/1500 useless extension candidates. Maximal degree in co-relation 14381. Up to 1284 conditions per place. [2022-12-13 15:35:41,041 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 225 selfloop transitions, 52 changer transitions 3/280 dead transitions. [2022-12-13 15:35:41,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 280 transitions, 5549 flow [2022-12-13 15:35:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:35:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:35:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2782 transitions. [2022-12-13 15:35:41,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38420107719928187 [2022-12-13 15:35:41,043 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2782 transitions. [2022-12-13 15:35:41,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2782 transitions. [2022-12-13 15:35:41,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:41,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2782 transitions. [2022-12-13 15:35:41,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.0) internal successors, (2782), 13 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:41,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:41,049 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:41,049 INFO L175 Difference]: Start difference. First operand has 213 places, 244 transitions, 4519 flow. Second operand 13 states and 2782 transitions. [2022-12-13 15:35:41,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 280 transitions, 5549 flow [2022-12-13 15:35:41,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 280 transitions, 5391 flow, removed 19 selfloop flow, removed 10 redundant places. [2022-12-13 15:35:41,142 INFO L231 Difference]: Finished difference. Result has 218 places, 252 transitions, 4688 flow [2022-12-13 15:35:41,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4688, PETRI_PLACES=218, PETRI_TRANSITIONS=252} [2022-12-13 15:35:41,142 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 195 predicate places. [2022-12-13 15:35:41,142 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 252 transitions, 4688 flow [2022-12-13 15:35:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:41,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:41,143 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:41,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 15:35:41,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:35:41,344 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1796557384, now seen corresponding path program 21 times [2022-12-13 15:35:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584507201] [2022-12-13 15:35:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:41,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:41,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584507201] [2022-12-13 15:35:41,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584507201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:41,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826505619] [2022-12-13 15:35:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:35:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:41,928 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:41,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 15:35:42,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:35:42,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:35:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:42,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:42,162 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 27 treesize of output 19 [2022-12-13 15:35:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:42,713 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:35:42,713 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 58 treesize of output 62 [2022-12-13 15:35:42,745 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:35:42,746 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 58 treesize of output 1 [2022-12-13 15:35:42,752 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:35:42,752 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 19 treesize of output 11 [2022-12-13 15:35:42,755 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:35:42,761 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-13 15:35:42,761 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 58 treesize of output 1 [2022-12-13 15:35:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:42,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826505619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:42,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:42,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:35:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797282555] [2022-12-13 15:35:42,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:35:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:35:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:35:44,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 557 [2022-12-13 15:35:44,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 252 transitions, 4688 flow. Second operand has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:44,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:44,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 557 [2022-12-13 15:35:44,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:45,084 INFO L130 PetriNetUnfolder]: 795/1509 cut-off events. [2022-12-13 15:35:45,084 INFO L131 PetriNetUnfolder]: For 39345/39345 co-relation queries the response was YES. [2022-12-13 15:35:45,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14649 conditions, 1509 events. 795/1509 cut-off events. For 39345/39345 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8813 event pairs, 268 based on Foata normal form. 2/1511 useless extension candidates. Maximal degree in co-relation 14504. Up to 1290 conditions per place. [2022-12-13 15:35:45,096 INFO L137 encePairwiseOnDemand]: 547/557 looper letters, 223 selfloop transitions, 55 changer transitions 5/283 dead transitions. [2022-12-13 15:35:45,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 283 transitions, 5637 flow [2022-12-13 15:35:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:35:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:35:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2570 transitions. [2022-12-13 15:35:45,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3845002992220227 [2022-12-13 15:35:45,098 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2570 transitions. [2022-12-13 15:35:45,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2570 transitions. [2022-12-13 15:35:45,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:45,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2570 transitions. [2022-12-13 15:35:45,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.16666666666666) internal successors, (2570), 12 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:45,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:45,103 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:45,103 INFO L175 Difference]: Start difference. First operand has 218 places, 252 transitions, 4688 flow. Second operand 12 states and 2570 transitions. [2022-12-13 15:35:45,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 283 transitions, 5637 flow [2022-12-13 15:35:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 283 transitions, 5507 flow, removed 38 selfloop flow, removed 7 redundant places. [2022-12-13 15:35:45,222 INFO L231 Difference]: Finished difference. Result has 225 places, 257 transitions, 4831 flow [2022-12-13 15:35:45,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4831, PETRI_PLACES=225, PETRI_TRANSITIONS=257} [2022-12-13 15:35:45,222 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 202 predicate places. [2022-12-13 15:35:45,222 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 257 transitions, 4831 flow [2022-12-13 15:35:45,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.08695652173913) internal successors, (4855), 23 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:45,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:45,223 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:45,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 15:35:45,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:45,424 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -63020406, now seen corresponding path program 22 times [2022-12-13 15:35:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:45,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716215182] [2022-12-13 15:35:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:46,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:46,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716215182] [2022-12-13 15:35:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716215182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:46,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443351950] [2022-12-13 15:35:46,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:35:46,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:46,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:46,011 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:46,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 15:35:46,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:35:46,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:35:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:46,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:46,278 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 46 treesize of output 30 [2022-12-13 15:35:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:46,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:46,497 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:35:46,497 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 12 treesize of output 4 [2022-12-13 15:35:46,524 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:35:46,524 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 [2022-12-13 15:35:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:46,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443351950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:46,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:46,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:35:46,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636574252] [2022-12-13 15:35:46,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:46,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:35:46,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:35:46,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:35:47,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:35:47,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 257 transitions, 4831 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:47,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:47,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:35:47,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:48,215 INFO L130 PetriNetUnfolder]: 820/1551 cut-off events. [2022-12-13 15:35:48,216 INFO L131 PetriNetUnfolder]: For 42592/42592 co-relation queries the response was YES. [2022-12-13 15:35:48,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15184 conditions, 1551 events. 820/1551 cut-off events. For 42592/42592 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9220 event pairs, 141 based on Foata normal form. 4/1555 useless extension candidates. Maximal degree in co-relation 15037. Up to 533 conditions per place. [2022-12-13 15:35:48,235 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 224 selfloop transitions, 132 changer transitions 8/364 dead transitions. [2022-12-13 15:35:48,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 364 transitions, 7280 flow [2022-12-13 15:35:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:35:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:35:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3259 transitions. [2022-12-13 15:35:48,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.390065828845003 [2022-12-13 15:35:48,239 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3259 transitions. [2022-12-13 15:35:48,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3259 transitions. [2022-12-13 15:35:48,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:48,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3259 transitions. [2022-12-13 15:35:48,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 217.26666666666668) internal successors, (3259), 15 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:48,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 557.0) internal successors, (8912), 16 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:48,245 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 557.0) internal successors, (8912), 16 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:48,245 INFO L175 Difference]: Start difference. First operand has 225 places, 257 transitions, 4831 flow. Second operand 15 states and 3259 transitions. [2022-12-13 15:35:48,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 364 transitions, 7280 flow [2022-12-13 15:35:48,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 364 transitions, 7095 flow, removed 56 selfloop flow, removed 7 redundant places. [2022-12-13 15:35:48,349 INFO L231 Difference]: Finished difference. Result has 235 places, 271 transitions, 5226 flow [2022-12-13 15:35:48,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5226, PETRI_PLACES=235, PETRI_TRANSITIONS=271} [2022-12-13 15:35:48,349 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 212 predicate places. [2022-12-13 15:35:48,349 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 271 transitions, 5226 flow [2022-12-13 15:35:48,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:48,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:48,350 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:48,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 15:35:48,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 15:35:48,551 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -520851932, now seen corresponding path program 23 times [2022-12-13 15:35:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:48,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565037599] [2022-12-13 15:35:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:49,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:49,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565037599] [2022-12-13 15:35:49,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565037599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:49,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962571267] [2022-12-13 15:35:49,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:35:49,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:49,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:49,099 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:49,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 15:35:49,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:35:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:35:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:49,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:49,469 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 58 treesize of output 51 [2022-12-13 15:35:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:49,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:49,716 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:35:49,716 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 12 treesize of output 4 [2022-12-13 15:35:49,754 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:35:49,755 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 [2022-12-13 15:35:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:49,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962571267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:49,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:49,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:35:49,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125405765] [2022-12-13 15:35:49,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:49,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:35:49,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:35:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:35:50,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:35:50,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 271 transitions, 5226 flow. Second operand has 20 states, 20 states have (on average 212.05) internal successors, (4241), 20 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:50,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:50,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:35:50,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:51,918 INFO L130 PetriNetUnfolder]: 860/1627 cut-off events. [2022-12-13 15:35:51,918 INFO L131 PetriNetUnfolder]: For 47352/47352 co-relation queries the response was YES. [2022-12-13 15:35:51,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16457 conditions, 1627 events. 860/1627 cut-off events. For 47352/47352 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 9754 event pairs, 207 based on Foata normal form. 4/1631 useless extension candidates. Maximal degree in co-relation 16307. Up to 969 conditions per place. [2022-12-13 15:35:51,931 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 224 selfloop transitions, 142 changer transitions 6/372 dead transitions. [2022-12-13 15:35:51,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 372 transitions, 7668 flow [2022-12-13 15:35:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:35:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:35:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3881 transitions. [2022-12-13 15:35:51,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38709355675244367 [2022-12-13 15:35:51,934 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3881 transitions. [2022-12-13 15:35:51,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3881 transitions. [2022-12-13 15:35:51,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:51,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3881 transitions. [2022-12-13 15:35:51,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:51,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:51,941 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:51,941 INFO L175 Difference]: Start difference. First operand has 235 places, 271 transitions, 5226 flow. Second operand 18 states and 3881 transitions. [2022-12-13 15:35:51,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 372 transitions, 7668 flow [2022-12-13 15:35:52,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 372 transitions, 7302 flow, removed 65 selfloop flow, removed 8 redundant places. [2022-12-13 15:35:52,063 INFO L231 Difference]: Finished difference. Result has 248 places, 281 transitions, 5417 flow [2022-12-13 15:35:52,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5417, PETRI_PLACES=248, PETRI_TRANSITIONS=281} [2022-12-13 15:35:52,063 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2022-12-13 15:35:52,063 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 281 transitions, 5417 flow [2022-12-13 15:35:52,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.05) internal successors, (4241), 20 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:52,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:52,064 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:52,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 15:35:52,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:52,265 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -301343346, now seen corresponding path program 24 times [2022-12-13 15:35:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:52,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313055155] [2022-12-13 15:35:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:52,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:52,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313055155] [2022-12-13 15:35:52,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313055155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:52,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014467587] [2022-12-13 15:35:52,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:35:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:52,957 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:52,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 15:35:53,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:35:53,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:35:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:53,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:53,217 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 35 [2022-12-13 15:35:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:53,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:53,456 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:35:53,456 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 12 treesize of output 4 [2022-12-13 15:35:53,489 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:35:53,489 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 [2022-12-13 15:35:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:53,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014467587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:53,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:53,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-13 15:35:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942380477] [2022-12-13 15:35:53,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:35:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:35:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:35:54,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:35:54,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 281 transitions, 5417 flow. Second operand has 18 states, 18 states have (on average 213.16666666666666) internal successors, (3837), 18 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:54,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:54,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:35:54,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:55,480 INFO L130 PetriNetUnfolder]: 856/1623 cut-off events. [2022-12-13 15:35:55,480 INFO L131 PetriNetUnfolder]: For 49087/49087 co-relation queries the response was YES. [2022-12-13 15:35:55,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16473 conditions, 1623 events. 856/1623 cut-off events. For 49087/49087 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 9781 event pairs, 216 based on Foata normal form. 4/1627 useless extension candidates. Maximal degree in co-relation 16319. Up to 989 conditions per place. [2022-12-13 15:35:55,494 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 206 selfloop transitions, 151 changer transitions 6/363 dead transitions. [2022-12-13 15:35:55,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 363 transitions, 7412 flow [2022-12-13 15:35:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:35:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:35:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2820 transitions. [2022-12-13 15:35:55,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38944897113658333 [2022-12-13 15:35:55,497 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2820 transitions. [2022-12-13 15:35:55,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2820 transitions. [2022-12-13 15:35:55,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:55,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2820 transitions. [2022-12-13 15:35:55,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 216.92307692307693) internal successors, (2820), 13 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:55,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:55,502 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:55,502 INFO L175 Difference]: Start difference. First operand has 248 places, 281 transitions, 5417 flow. Second operand 13 states and 2820 transitions. [2022-12-13 15:35:55,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 363 transitions, 7412 flow [2022-12-13 15:35:55,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 363 transitions, 7139 flow, removed 61 selfloop flow, removed 9 redundant places. [2022-12-13 15:35:55,637 INFO L231 Difference]: Finished difference. Result has 252 places, 290 transitions, 5612 flow [2022-12-13 15:35:55,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5612, PETRI_PLACES=252, PETRI_TRANSITIONS=290} [2022-12-13 15:35:55,637 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 229 predicate places. [2022-12-13 15:35:55,637 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 290 transitions, 5612 flow [2022-12-13 15:35:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 213.16666666666666) internal successors, (3837), 18 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:55,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:55,638 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:55,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 15:35:55,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 15:35:55,839 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1073919728, now seen corresponding path program 25 times [2022-12-13 15:35:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444024985] [2022-12-13 15:35:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:56,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:56,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444024985] [2022-12-13 15:35:56,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444024985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:56,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316219984] [2022-12-13 15:35:56,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:35:56,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:56,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:56,418 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:56,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 15:35:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:35:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:56,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:56,812 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:35:56,812 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 12 treesize of output 4 [2022-12-13 15:35:56,840 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:35:56,840 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 [2022-12-13 15:35:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:56,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316219984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:56,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:56,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-13 15:35:56,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935855556] [2022-12-13 15:35:56,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:56,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:35:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:56,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:35:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:35:57,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:35:57,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 290 transitions, 5612 flow. Second operand has 18 states, 18 states have (on average 214.22222222222223) internal successors, (3856), 18 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:57,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:57,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:35:57,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:58,557 INFO L130 PetriNetUnfolder]: 858/1623 cut-off events. [2022-12-13 15:35:58,557 INFO L131 PetriNetUnfolder]: For 47653/47653 co-relation queries the response was YES. [2022-12-13 15:35:58,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16641 conditions, 1623 events. 858/1623 cut-off events. For 47653/47653 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 9752 event pairs, 225 based on Foata normal form. 4/1627 useless extension candidates. Maximal degree in co-relation 16485. Up to 1029 conditions per place. [2022-12-13 15:35:58,571 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 209 selfloop transitions, 138 changer transitions 4/351 dead transitions. [2022-12-13 15:35:58,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 351 transitions, 7315 flow [2022-12-13 15:35:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:35:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:35:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2395 transitions. [2022-12-13 15:35:58,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3908927697078505 [2022-12-13 15:35:58,573 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2395 transitions. [2022-12-13 15:35:58,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2395 transitions. [2022-12-13 15:35:58,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:58,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2395 transitions. [2022-12-13 15:35:58,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 217.72727272727272) internal successors, (2395), 11 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:58,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:58,577 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:58,577 INFO L175 Difference]: Start difference. First operand has 252 places, 290 transitions, 5612 flow. Second operand 11 states and 2395 transitions. [2022-12-13 15:35:58,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 351 transitions, 7315 flow [2022-12-13 15:35:58,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 351 transitions, 7007 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-12-13 15:35:58,713 INFO L231 Difference]: Finished difference. Result has 253 places, 290 transitions, 5686 flow [2022-12-13 15:35:58,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=5263, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5686, PETRI_PLACES=253, PETRI_TRANSITIONS=290} [2022-12-13 15:35:58,714 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 230 predicate places. [2022-12-13 15:35:58,714 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 290 transitions, 5686 flow [2022-12-13 15:35:58,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 214.22222222222223) internal successors, (3856), 18 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:58,714 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:58,714 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:58,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 15:35:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 15:35:58,916 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1848019866, now seen corresponding path program 26 times [2022-12-13 15:35:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:58,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292986177] [2022-12-13 15:35:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:58,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:59,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292986177] [2022-12-13 15:35:59,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292986177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:59,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657072449] [2022-12-13 15:35:59,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:35:59,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:59,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:59,439 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:59,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 15:35:59,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:35:59,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:35:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:59,691 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:35:59,691 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 26 treesize of output 14 [2022-12-13 15:35:59,699 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:35:59,699 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 25 treesize of output 9 [2022-12-13 15:35:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:35:59,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:59,948 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:35:59,949 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 12 treesize of output 4 [2022-12-13 15:35:59,975 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:35:59,975 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 [2022-12-13 15:36:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657072449] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:00,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84081754] [2022-12-13 15:36:00,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:00,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:00,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:36:00,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 290 transitions, 5686 flow. Second operand has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:00,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:00,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:36:00,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:01,879 INFO L130 PetriNetUnfolder]: 921/1725 cut-off events. [2022-12-13 15:36:01,879 INFO L131 PetriNetUnfolder]: For 50963/50963 co-relation queries the response was YES. [2022-12-13 15:36:01,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17938 conditions, 1725 events. 921/1725 cut-off events. For 50963/50963 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10406 event pairs, 232 based on Foata normal form. 4/1729 useless extension candidates. Maximal degree in co-relation 17781. Up to 1121 conditions per place. [2022-12-13 15:36:01,894 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 222 selfloop transitions, 146 changer transitions 7/375 dead transitions. [2022-12-13 15:36:01,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 375 transitions, 7859 flow [2022-12-13 15:36:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:36:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:36:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3029 transitions. [2022-12-13 15:36:01,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3884329315209028 [2022-12-13 15:36:01,897 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3029 transitions. [2022-12-13 15:36:01,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3029 transitions. [2022-12-13 15:36:01,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:01,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3029 transitions. [2022-12-13 15:36:01,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 216.35714285714286) internal successors, (3029), 14 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:01,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:01,903 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:01,903 INFO L175 Difference]: Start difference. First operand has 253 places, 290 transitions, 5686 flow. Second operand 14 states and 3029 transitions. [2022-12-13 15:36:01,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 375 transitions, 7859 flow [2022-12-13 15:36:02,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 375 transitions, 7769 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 15:36:02,054 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 6456 flow [2022-12-13 15:36:02,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6456, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2022-12-13 15:36:02,055 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 237 predicate places. [2022-12-13 15:36:02,055 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 6456 flow [2022-12-13 15:36:02,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:02,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:02,055 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:02,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 15:36:02,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:36:02,257 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1193879878, now seen corresponding path program 27 times [2022-12-13 15:36:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:02,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363424919] [2022-12-13 15:36:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:02,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:02,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:02,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363424919] [2022-12-13 15:36:02,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363424919] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:02,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721622844] [2022-12-13 15:36:02,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:36:02,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:02,786 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:02,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 15:36:02,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:36:02,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:03,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:03,077 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 65 treesize of output 41 [2022-12-13 15:36:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:03,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:03,298 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:03,298 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 12 treesize of output 4 [2022-12-13 15:36:03,334 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:36:03,335 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 [2022-12-13 15:36:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721622844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:03,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:03,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131176149] [2022-12-13 15:36:03,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:04,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:36:04,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 6456 flow. Second operand has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:04,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:04,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:36:04,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:05,189 INFO L130 PetriNetUnfolder]: 899/1680 cut-off events. [2022-12-13 15:36:05,189 INFO L131 PetriNetUnfolder]: For 51775/51775 co-relation queries the response was YES. [2022-12-13 15:36:05,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18210 conditions, 1680 events. 899/1680 cut-off events. For 51775/51775 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10044 event pairs, 229 based on Foata normal form. 10/1690 useless extension candidates. Maximal degree in co-relation 18050. Up to 1092 conditions per place. [2022-12-13 15:36:05,205 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 209 selfloop transitions, 162 changer transitions 8/379 dead transitions. [2022-12-13 15:36:05,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 379 transitions, 8230 flow [2022-12-13 15:36:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:36:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:36:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3456 transitions. [2022-12-13 15:36:05,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3877917414721723 [2022-12-13 15:36:05,208 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3456 transitions. [2022-12-13 15:36:05,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3456 transitions. [2022-12-13 15:36:05,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:05,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3456 transitions. [2022-12-13 15:36:05,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:05,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:05,215 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:05,215 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 6456 flow. Second operand 16 states and 3456 transitions. [2022-12-13 15:36:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 379 transitions, 8230 flow [2022-12-13 15:36:05,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 379 transitions, 8001 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-12-13 15:36:05,374 INFO L231 Difference]: Finished difference. Result has 265 places, 310 transitions, 6567 flow [2022-12-13 15:36:05,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6567, PETRI_PLACES=265, PETRI_TRANSITIONS=310} [2022-12-13 15:36:05,374 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 242 predicate places. [2022-12-13 15:36:05,375 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 310 transitions, 6567 flow [2022-12-13 15:36:05,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:05,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:05,375 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:05,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 15:36:05,576 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash 717331074, now seen corresponding path program 28 times [2022-12-13 15:36:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:05,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822547439] [2022-12-13 15:36:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822547439] [2022-12-13 15:36:06,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822547439] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161028611] [2022-12-13 15:36:06,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:36:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:06,131 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:06,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 15:36:06,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:36:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:06,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:06,519 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:36:06,520 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 82 treesize of output 107 [2022-12-13 15:36:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:06,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161028611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:06,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:06,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-13 15:36:06,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659437423] [2022-12-13 15:36:06,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:06,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:36:06,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:36:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:36:07,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:36:07,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 310 transitions, 6567 flow. Second operand has 18 states, 18 states have (on average 214.16666666666666) internal successors, (3855), 18 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:07,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:07,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:36:07,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:07,921 INFO L130 PetriNetUnfolder]: 916/1697 cut-off events. [2022-12-13 15:36:07,921 INFO L131 PetriNetUnfolder]: For 54842/54842 co-relation queries the response was YES. [2022-12-13 15:36:07,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18903 conditions, 1697 events. 916/1697 cut-off events. For 54842/54842 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10049 event pairs, 199 based on Foata normal form. 4/1701 useless extension candidates. Maximal degree in co-relation 18743. Up to 1013 conditions per place. [2022-12-13 15:36:07,937 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 205 selfloop transitions, 177 changer transitions 4/386 dead transitions. [2022-12-13 15:36:07,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 386 transitions, 8733 flow [2022-12-13 15:36:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:36:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:36:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3040 transitions. [2022-12-13 15:36:07,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3898435496281098 [2022-12-13 15:36:07,939 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3040 transitions. [2022-12-13 15:36:07,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3040 transitions. [2022-12-13 15:36:07,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:07,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3040 transitions. [2022-12-13 15:36:07,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 217.14285714285714) internal successors, (3040), 14 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:07,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:07,945 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:07,945 INFO L175 Difference]: Start difference. First operand has 265 places, 310 transitions, 6567 flow. Second operand 14 states and 3040 transitions. [2022-12-13 15:36:07,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 386 transitions, 8733 flow [2022-12-13 15:36:08,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 386 transitions, 8421 flow, removed 13 selfloop flow, removed 14 redundant places. [2022-12-13 15:36:08,115 INFO L231 Difference]: Finished difference. Result has 264 places, 316 transitions, 6952 flow [2022-12-13 15:36:08,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6952, PETRI_PLACES=264, PETRI_TRANSITIONS=316} [2022-12-13 15:36:08,115 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 241 predicate places. [2022-12-13 15:36:08,115 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 316 transitions, 6952 flow [2022-12-13 15:36:08,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 214.16666666666666) internal successors, (3855), 18 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:08,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:08,116 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:08,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:08,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 15:36:08,317 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 654312450, now seen corresponding path program 29 times [2022-12-13 15:36:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:08,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800704309] [2022-12-13 15:36:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:08,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:08,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800704309] [2022-12-13 15:36:08,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800704309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219287139] [2022-12-13 15:36:08,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:36:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:08,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:08,779 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 15:36:08,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:36:08,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:09,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-12-13 15:36:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:09,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:09,314 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:36:09,314 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 82 treesize of output 107 [2022-12-13 15:36:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219287139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:09,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:09,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121801715] [2022-12-13 15:36:09,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:09,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:09,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:09,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:09,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:36:09,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 316 transitions, 6952 flow. Second operand has 20 states, 20 states have (on average 212.15) internal successors, (4243), 20 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:09,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:09,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:36:09,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:11,029 INFO L130 PetriNetUnfolder]: 951/1758 cut-off events. [2022-12-13 15:36:11,029 INFO L131 PetriNetUnfolder]: For 60950/60950 co-relation queries the response was YES. [2022-12-13 15:36:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20141 conditions, 1758 events. 951/1758 cut-off events. For 60950/60950 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10461 event pairs, 202 based on Foata normal form. 4/1762 useless extension candidates. Maximal degree in co-relation 19980. Up to 1035 conditions per place. [2022-12-13 15:36:11,045 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 209 selfloop transitions, 186 changer transitions 4/399 dead transitions. [2022-12-13 15:36:11,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 9305 flow [2022-12-13 15:36:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:36:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:36:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3440 transitions. [2022-12-13 15:36:11,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3859964093357271 [2022-12-13 15:36:11,048 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3440 transitions. [2022-12-13 15:36:11,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3440 transitions. [2022-12-13 15:36:11,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:11,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3440 transitions. [2022-12-13 15:36:11,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 215.0) internal successors, (3440), 16 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:11,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:11,054 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:11,054 INFO L175 Difference]: Start difference. First operand has 264 places, 316 transitions, 6952 flow. Second operand 16 states and 3440 transitions. [2022-12-13 15:36:11,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 9305 flow [2022-12-13 15:36:11,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 399 transitions, 9002 flow, removed 28 selfloop flow, removed 12 redundant places. [2022-12-13 15:36:11,227 INFO L231 Difference]: Finished difference. Result has 270 places, 326 transitions, 7494 flow [2022-12-13 15:36:11,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7494, PETRI_PLACES=270, PETRI_TRANSITIONS=326} [2022-12-13 15:36:11,227 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 247 predicate places. [2022-12-13 15:36:11,227 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 326 transitions, 7494 flow [2022-12-13 15:36:11,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.15) internal successors, (4243), 20 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:11,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:11,228 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:11,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:11,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:11,429 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1402796242, now seen corresponding path program 30 times [2022-12-13 15:36:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:11,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061102918] [2022-12-13 15:36:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:11,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061102918] [2022-12-13 15:36:11,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061102918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225408805] [2022-12-13 15:36:11,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:36:11,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:11,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:11,993 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:11,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 15:36:12,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:36:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:12,345 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:36:12,345 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 26 treesize of output 14 [2022-12-13 15:36:12,354 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:36:12,354 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 25 treesize of output 9 [2022-12-13 15:36:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:12,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:12,610 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:36:12,610 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 82 treesize of output 107 [2022-12-13 15:36:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:12,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225408805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:12,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:12,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030991957] [2022-12-13 15:36:12,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:12,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:12,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:13,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:36:13,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 326 transitions, 7494 flow. Second operand has 20 states, 20 states have (on average 213.1) internal successors, (4262), 20 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:13,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:13,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:36:13,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:14,647 INFO L130 PetriNetUnfolder]: 999/1838 cut-off events. [2022-12-13 15:36:14,647 INFO L131 PetriNetUnfolder]: For 69480/69480 co-relation queries the response was YES. [2022-12-13 15:36:14,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21912 conditions, 1838 events. 999/1838 cut-off events. For 69480/69480 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 11015 event pairs, 199 based on Foata normal form. 4/1842 useless extension candidates. Maximal degree in co-relation 21751. Up to 1016 conditions per place. [2022-12-13 15:36:14,664 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 215 selfloop transitions, 195 changer transitions 9/419 dead transitions. [2022-12-13 15:36:14,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 419 transitions, 10068 flow [2022-12-13 15:36:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:36:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:36:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4317 transitions. [2022-12-13 15:36:14,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3875224416517056 [2022-12-13 15:36:14,668 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4317 transitions. [2022-12-13 15:36:14,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4317 transitions. [2022-12-13 15:36:14,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:14,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4317 transitions. [2022-12-13 15:36:14,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 215.85) internal successors, (4317), 20 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,675 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,675 INFO L175 Difference]: Start difference. First operand has 270 places, 326 transitions, 7494 flow. Second operand 20 states and 4317 transitions. [2022-12-13 15:36:14,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 419 transitions, 10068 flow [2022-12-13 15:36:14,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 419 transitions, 9927 flow, removed 18 selfloop flow, removed 9 redundant places. [2022-12-13 15:36:14,872 INFO L231 Difference]: Finished difference. Result has 284 places, 338 transitions, 8159 flow [2022-12-13 15:36:14,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=7367, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8159, PETRI_PLACES=284, PETRI_TRANSITIONS=338} [2022-12-13 15:36:14,872 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 261 predicate places. [2022-12-13 15:36:14,872 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 338 transitions, 8159 flow [2022-12-13 15:36:14,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.1) internal successors, (4262), 20 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:14,873 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:14,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:15,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:15,074 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1299264894, now seen corresponding path program 31 times [2022-12-13 15:36:15,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:15,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260101589] [2022-12-13 15:36:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:15,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260101589] [2022-12-13 15:36:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260101589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499111478] [2022-12-13 15:36:15,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:36:15,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:15,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:15,590 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:15,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 15:36:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:15,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:15,987 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:36:15,987 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 [2022-12-13 15:36:16,000 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:16,000 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 [2022-12-13 15:36:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:16,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499111478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:16,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:16,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-13 15:36:16,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287614008] [2022-12-13 15:36:16,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:36:16,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:36:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:36:16,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:36:16,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 338 transitions, 8159 flow. Second operand has 18 states, 18 states have (on average 214.16666666666666) internal successors, (3855), 18 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:16,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:16,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:36:16,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:17,385 INFO L130 PetriNetUnfolder]: 1010/1852 cut-off events. [2022-12-13 15:36:17,385 INFO L131 PetriNetUnfolder]: For 78042/78042 co-relation queries the response was YES. [2022-12-13 15:36:17,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22987 conditions, 1852 events. 1010/1852 cut-off events. For 78042/78042 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 11156 event pairs, 216 based on Foata normal form. 4/1856 useless extension candidates. Maximal degree in co-relation 22821. Up to 1091 conditions per place. [2022-12-13 15:36:17,404 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 201 selfloop transitions, 191 changer transitions 4/396 dead transitions. [2022-12-13 15:36:17,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 396 transitions, 10019 flow [2022-12-13 15:36:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:36:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:36:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2607 transitions. [2022-12-13 15:36:17,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3900359066427289 [2022-12-13 15:36:17,407 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2607 transitions. [2022-12-13 15:36:17,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2607 transitions. [2022-12-13 15:36:17,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:17,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2607 transitions. [2022-12-13 15:36:17,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 217.25) internal successors, (2607), 12 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,411 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,411 INFO L175 Difference]: Start difference. First operand has 284 places, 338 transitions, 8159 flow. Second operand 12 states and 2607 transitions. [2022-12-13 15:36:17,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 396 transitions, 10019 flow [2022-12-13 15:36:17,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 396 transitions, 9824 flow, removed 41 selfloop flow, removed 10 redundant places. [2022-12-13 15:36:17,639 INFO L231 Difference]: Finished difference. Result has 286 places, 340 transitions, 8592 flow [2022-12-13 15:36:17,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=7964, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8592, PETRI_PLACES=286, PETRI_TRANSITIONS=340} [2022-12-13 15:36:17,639 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 263 predicate places. [2022-12-13 15:36:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 340 transitions, 8592 flow [2022-12-13 15:36:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 214.16666666666666) internal successors, (3855), 18 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:17,640 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:17,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 15:36:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:36:17,841 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 498307768, now seen corresponding path program 32 times [2022-12-13 15:36:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:17,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222560216] [2022-12-13 15:36:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:17,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:18,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222560216] [2022-12-13 15:36:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222560216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582637957] [2022-12-13 15:36:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:36:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:18,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:18,397 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:18,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 15:36:18,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:36:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:18,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:18,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:18,785 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:36:18,786 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 [2022-12-13 15:36:18,799 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:18,799 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 [2022-12-13 15:36:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:18,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582637957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:18,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:18,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:18,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920598147] [2022-12-13 15:36:18,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:18,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:19,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:36:19,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 340 transitions, 8592 flow. Second operand has 20 states, 20 states have (on average 212.2) internal successors, (4244), 20 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:19,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:19,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:36:19,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:20,553 INFO L130 PetriNetUnfolder]: 1137/2071 cut-off events. [2022-12-13 15:36:20,553 INFO L131 PetriNetUnfolder]: For 97009/97009 co-relation queries the response was YES. [2022-12-13 15:36:20,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26867 conditions, 2071 events. 1137/2071 cut-off events. For 97009/97009 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 12657 event pairs, 275 based on Foata normal form. 4/2075 useless extension candidates. Maximal degree in co-relation 26698. Up to 1489 conditions per place. [2022-12-13 15:36:20,595 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 195 selfloop transitions, 230 changer transitions 11/436 dead transitions. [2022-12-13 15:36:20,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 436 transitions, 11660 flow [2022-12-13 15:36:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:36:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:36:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2374 transitions. [2022-12-13 15:36:20,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3874653174473641 [2022-12-13 15:36:20,597 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2374 transitions. [2022-12-13 15:36:20,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2374 transitions. [2022-12-13 15:36:20,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:20,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2374 transitions. [2022-12-13 15:36:20,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 215.8181818181818) internal successors, (2374), 11 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:20,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:20,601 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:20,601 INFO L175 Difference]: Start difference. First operand has 286 places, 340 transitions, 8592 flow. Second operand 11 states and 2374 transitions. [2022-12-13 15:36:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 436 transitions, 11660 flow [2022-12-13 15:36:20,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 436 transitions, 11576 flow, removed 19 selfloop flow, removed 6 redundant places. [2022-12-13 15:36:20,851 INFO L231 Difference]: Finished difference. Result has 295 places, 404 transitions, 11278 flow [2022-12-13 15:36:20,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=8524, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11278, PETRI_PLACES=295, PETRI_TRANSITIONS=404} [2022-12-13 15:36:20,852 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 272 predicate places. [2022-12-13 15:36:20,852 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 404 transitions, 11278 flow [2022-12-13 15:36:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.2) internal successors, (4244), 20 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:20,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:20,852 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:20,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 15:36:21,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:21,053 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash 938593710, now seen corresponding path program 33 times [2022-12-13 15:36:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:21,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725075114] [2022-12-13 15:36:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:21,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725075114] [2022-12-13 15:36:21,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725075114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821510718] [2022-12-13 15:36:21,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:36:21,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:21,636 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:21,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 15:36:21,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:36:21,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:21,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:22,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:22,044 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 58 treesize of output 51 [2022-12-13 15:36:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:22,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:22,265 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:36:22,266 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 [2022-12-13 15:36:22,278 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:22,278 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 [2022-12-13 15:36:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:22,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821510718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:22,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:22,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645684880] [2022-12-13 15:36:22,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:22,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:22,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:22,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:36:22,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 404 transitions, 11278 flow. Second operand has 20 states, 20 states have (on average 212.1) internal successors, (4242), 20 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:22,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:22,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:36:22,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:24,249 INFO L130 PetriNetUnfolder]: 1166/2117 cut-off events. [2022-12-13 15:36:24,249 INFO L131 PetriNetUnfolder]: For 109823/109823 co-relation queries the response was YES. [2022-12-13 15:36:24,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29210 conditions, 2117 events. 1166/2117 cut-off events. For 109823/109823 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 12966 event pairs, 203 based on Foata normal form. 4/2121 useless extension candidates. Maximal degree in co-relation 29035. Up to 1140 conditions per place. [2022-12-13 15:36:24,271 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 235 selfloop transitions, 238 changer transitions 6/479 dead transitions. [2022-12-13 15:36:24,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 479 transitions, 13797 flow [2022-12-13 15:36:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:36:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:36:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3873 transitions. [2022-12-13 15:36:24,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.386295631358468 [2022-12-13 15:36:24,274 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3873 transitions. [2022-12-13 15:36:24,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3873 transitions. [2022-12-13 15:36:24,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:24,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3873 transitions. [2022-12-13 15:36:24,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.16666666666666) internal successors, (3873), 18 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:24,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:24,281 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:24,281 INFO L175 Difference]: Start difference. First operand has 295 places, 404 transitions, 11278 flow. Second operand 18 states and 3873 transitions. [2022-12-13 15:36:24,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 479 transitions, 13797 flow [2022-12-13 15:36:24,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 479 transitions, 13692 flow, removed 39 selfloop flow, removed 4 redundant places. [2022-12-13 15:36:24,605 INFO L231 Difference]: Finished difference. Result has 309 places, 412 transitions, 12043 flow [2022-12-13 15:36:24,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=11215, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12043, PETRI_PLACES=309, PETRI_TRANSITIONS=412} [2022-12-13 15:36:24,606 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 286 predicate places. [2022-12-13 15:36:24,606 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 412 transitions, 12043 flow [2022-12-13 15:36:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.1) internal successors, (4242), 20 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:24,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:24,607 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:24,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:24,808 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1592733698, now seen corresponding path program 34 times [2022-12-13 15:36:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:24,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588577131] [2022-12-13 15:36:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:25,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:25,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588577131] [2022-12-13 15:36:25,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588577131] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:25,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663655340] [2022-12-13 15:36:25,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:36:25,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:25,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:25,366 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:25,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 15:36:25,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:36:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:25,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:25,629 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 35 [2022-12-13 15:36:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:25,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:25,870 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:36:25,871 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 [2022-12-13 15:36:25,882 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:25,882 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 [2022-12-13 15:36:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:25,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663655340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:25,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:25,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-13 15:36:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522335509] [2022-12-13 15:36:25,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:25,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:36:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:36:25,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:36:26,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:36:26,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 412 transitions, 12043 flow. Second operand has 18 states, 18 states have (on average 213.16666666666666) internal successors, (3837), 18 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:26,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:26,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:36:26,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:27,835 INFO L130 PetriNetUnfolder]: 1190/2163 cut-off events. [2022-12-13 15:36:27,836 INFO L131 PetriNetUnfolder]: For 118809/118809 co-relation queries the response was YES. [2022-12-13 15:36:27,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30533 conditions, 2163 events. 1190/2163 cut-off events. For 118809/118809 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 13323 event pairs, 218 based on Foata normal form. 4/2167 useless extension candidates. Maximal degree in co-relation 30355. Up to 1190 conditions per place. [2022-12-13 15:36:27,860 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 222 selfloop transitions, 242 changer transitions 6/470 dead transitions. [2022-12-13 15:36:27,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 470 transitions, 14059 flow [2022-12-13 15:36:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:36:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:36:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3031 transitions. [2022-12-13 15:36:27,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388689407540395 [2022-12-13 15:36:27,863 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3031 transitions. [2022-12-13 15:36:27,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3031 transitions. [2022-12-13 15:36:27,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:27,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3031 transitions. [2022-12-13 15:36:27,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 216.5) internal successors, (3031), 14 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:27,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:27,868 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:27,868 INFO L175 Difference]: Start difference. First operand has 309 places, 412 transitions, 12043 flow. Second operand 14 states and 3031 transitions. [2022-12-13 15:36:27,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 470 transitions, 14059 flow [2022-12-13 15:36:28,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 470 transitions, 13833 flow, removed 48 selfloop flow, removed 10 redundant places. [2022-12-13 15:36:28,179 INFO L231 Difference]: Finished difference. Result has 313 places, 418 transitions, 12519 flow [2022-12-13 15:36:28,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=11821, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12519, PETRI_PLACES=313, PETRI_TRANSITIONS=418} [2022-12-13 15:36:28,179 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 290 predicate places. [2022-12-13 15:36:28,179 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 418 transitions, 12519 flow [2022-12-13 15:36:28,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 213.16666666666666) internal successors, (3837), 18 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:28,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:28,180 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:28,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 15:36:28,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 15:36:28,381 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 46057178, now seen corresponding path program 35 times [2022-12-13 15:36:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:28,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925053624] [2022-12-13 15:36:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:28,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:28,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925053624] [2022-12-13 15:36:28,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925053624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:28,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859246975] [2022-12-13 15:36:28,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:36:28,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:28,891 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:28,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 15:36:29,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:36:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:29,172 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:36:29,172 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 26 treesize of output 14 [2022-12-13 15:36:29,179 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:36:29,179 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 25 treesize of output 9 [2022-12-13 15:36:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:29,407 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:36:29,407 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 [2022-12-13 15:36:29,418 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:29,418 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 [2022-12-13 15:36:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:29,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859246975] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:29,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:29,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:29,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678811241] [2022-12-13 15:36:29,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:30,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:36:30,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 418 transitions, 12519 flow. Second operand has 20 states, 20 states have (on average 212.3) internal successors, (4246), 20 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:30,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:30,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:36:30,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:31,655 INFO L130 PetriNetUnfolder]: 1180/2143 cut-off events. [2022-12-13 15:36:31,656 INFO L131 PetriNetUnfolder]: For 120377/120377 co-relation queries the response was YES. [2022-12-13 15:36:31,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30821 conditions, 2143 events. 1180/2143 cut-off events. For 120377/120377 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 13169 event pairs, 231 based on Foata normal form. 4/2147 useless extension candidates. Maximal degree in co-relation 30641. Up to 1274 conditions per place. [2022-12-13 15:36:31,679 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 231 selfloop transitions, 227 changer transitions 7/465 dead transitions. [2022-12-13 15:36:31,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 465 transitions, 14243 flow [2022-12-13 15:36:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:36:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:36:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2804 transitions. [2022-12-13 15:36:31,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38723933158403534 [2022-12-13 15:36:31,681 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2804 transitions. [2022-12-13 15:36:31,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2804 transitions. [2022-12-13 15:36:31,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:31,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2804 transitions. [2022-12-13 15:36:31,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 215.69230769230768) internal successors, (2804), 13 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:31,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:31,687 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:31,687 INFO L175 Difference]: Start difference. First operand has 313 places, 418 transitions, 12519 flow. Second operand 13 states and 2804 transitions. [2022-12-13 15:36:31,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 465 transitions, 14243 flow [2022-12-13 15:36:32,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 465 transitions, 13813 flow, removed 17 selfloop flow, removed 10 redundant places. [2022-12-13 15:36:32,033 INFO L231 Difference]: Finished difference. Result has 314 places, 416 transitions, 12515 flow [2022-12-13 15:36:32,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=12073, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12515, PETRI_PLACES=314, PETRI_TRANSITIONS=416} [2022-12-13 15:36:32,033 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 291 predicate places. [2022-12-13 15:36:32,033 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 416 transitions, 12515 flow [2022-12-13 15:36:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.3) internal successors, (4246), 20 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:32,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:32,034 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:32,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 15:36:32,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 15:36:32,235 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash 700197166, now seen corresponding path program 36 times [2022-12-13 15:36:32,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:32,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587022730] [2022-12-13 15:36:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:32,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:32,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587022730] [2022-12-13 15:36:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587022730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83493623] [2022-12-13 15:36:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:36:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:32,738 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:32,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 15:36:32,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:36:32,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:32,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:32,989 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 65 treesize of output 41 [2022-12-13 15:36:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:33,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:33,163 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:36:33,164 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 [2022-12-13 15:36:33,174 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:36:33,175 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 [2022-12-13 15:36:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:33,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83493623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:33,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:33,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:36:33,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428714212] [2022-12-13 15:36:33,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:33,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:36:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:36:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:36:33,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:36:33,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 416 transitions, 12515 flow. Second operand has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:33,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:33,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:36:33,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:35,155 INFO L130 PetriNetUnfolder]: 1164/2108 cut-off events. [2022-12-13 15:36:35,155 INFO L131 PetriNetUnfolder]: For 121608/121608 co-relation queries the response was YES. [2022-12-13 15:36:35,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30665 conditions, 2108 events. 1164/2108 cut-off events. For 121608/121608 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 12888 event pairs, 226 based on Foata normal form. 4/2112 useless extension candidates. Maximal degree in co-relation 30485. Up to 1259 conditions per place. [2022-12-13 15:36:35,178 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 218 selfloop transitions, 235 changer transitions 7/460 dead transitions. [2022-12-13 15:36:35,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 460 transitions, 14125 flow [2022-12-13 15:36:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:36:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:36:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3455 transitions. [2022-12-13 15:36:35,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3876795332136445 [2022-12-13 15:36:35,181 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3455 transitions. [2022-12-13 15:36:35,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3455 transitions. [2022-12-13 15:36:35,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:35,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3455 transitions. [2022-12-13 15:36:35,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 215.9375) internal successors, (3455), 16 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:35,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:35,186 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:35,186 INFO L175 Difference]: Start difference. First operand has 314 places, 416 transitions, 12515 flow. Second operand 16 states and 3455 transitions. [2022-12-13 15:36:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 460 transitions, 14125 flow [2022-12-13 15:36:35,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 460 transitions, 13876 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-12-13 15:36:35,517 INFO L231 Difference]: Finished difference. Result has 318 places, 414 transitions, 12706 flow [2022-12-13 15:36:35,517 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=12246, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12706, PETRI_PLACES=318, PETRI_TRANSITIONS=414} [2022-12-13 15:36:35,517 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 295 predicate places. [2022-12-13 15:36:35,517 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 414 transitions, 12706 flow [2022-12-13 15:36:35,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:35,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:35,518 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:35,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:35,719 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1878655460, now seen corresponding path program 37 times [2022-12-13 15:36:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670522768] [2022-12-13 15:36:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:36:36,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670522768] [2022-12-13 15:36:36,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670522768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:36,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511669615] [2022-12-13 15:36:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:36:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:36,999 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:36,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 15:36:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 15:36:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:37,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:37,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:37,412 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:36:37,413 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 20 treesize of output 25 [2022-12-13 15:36:37,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:37,572 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 46 treesize of output 30 [2022-12-13 15:36:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:37,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:37,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:37,919 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 94 treesize of output 134 [2022-12-13 15:36:37,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:37,929 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 [2022-12-13 15:36:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:38,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511669615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:38,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:38,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 36 [2022-12-13 15:36:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627591554] [2022-12-13 15:36:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:36:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:36:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1180, Unknown=4, NotChecked=0, Total=1332 [2022-12-13 15:36:38,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 557 [2022-12-13 15:36:38,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 414 transitions, 12706 flow. Second operand has 37 states, 37 states have (on average 166.54054054054055) internal successors, (6162), 37 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:38,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:38,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 557 [2022-12-13 15:36:38,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:41,252 INFO L130 PetriNetUnfolder]: 1156/2085 cut-off events. [2022-12-13 15:36:41,252 INFO L131 PetriNetUnfolder]: For 121369/121369 co-relation queries the response was YES. [2022-12-13 15:36:41,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30667 conditions, 2085 events. 1156/2085 cut-off events. For 121369/121369 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 12611 event pairs, 79 based on Foata normal form. 8/2093 useless extension candidates. Maximal degree in co-relation 30488. Up to 755 conditions per place. [2022-12-13 15:36:41,278 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 215 selfloop transitions, 264 changer transitions 16/495 dead transitions. [2022-12-13 15:36:41,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 495 transitions, 15182 flow [2022-12-13 15:36:41,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:36:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:36:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3390 transitions. [2022-12-13 15:36:41,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30430879712746856 [2022-12-13 15:36:41,281 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3390 transitions. [2022-12-13 15:36:41,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3390 transitions. [2022-12-13 15:36:41,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:41,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3390 transitions. [2022-12-13 15:36:41,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 169.5) internal successors, (3390), 20 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:41,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:41,288 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:41,288 INFO L175 Difference]: Start difference. First operand has 318 places, 414 transitions, 12706 flow. Second operand 20 states and 3390 transitions. [2022-12-13 15:36:41,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 495 transitions, 15182 flow [2022-12-13 15:36:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 495 transitions, 14814 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-12-13 15:36:41,631 INFO L231 Difference]: Finished difference. Result has 323 places, 424 transitions, 13177 flow [2022-12-13 15:36:41,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=12357, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13177, PETRI_PLACES=323, PETRI_TRANSITIONS=424} [2022-12-13 15:36:41,631 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 300 predicate places. [2022-12-13 15:36:41,631 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 424 transitions, 13177 flow [2022-12-13 15:36:41,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 166.54054054054055) internal successors, (6162), 37 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:41,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:41,632 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:41,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:41,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 15:36:41,833 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash -630504674, now seen corresponding path program 38 times [2022-12-13 15:36:41,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:41,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556728376] [2022-12-13 15:36:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:41,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556728376] [2022-12-13 15:36:42,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556728376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628797176] [2022-12-13 15:36:42,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:36:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:42,354 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:42,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 15:36:42,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:36:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:42,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:42,806 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:36:42,807 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 70 treesize of output 72 [2022-12-13 15:36:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:42,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628797176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:42,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:42,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-13 15:36:42,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296088059] [2022-12-13 15:36:42,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:42,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:36:42,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:36:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:36:43,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:36:43,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 424 transitions, 13177 flow. Second operand has 19 states, 19 states have (on average 214.1578947368421) internal successors, (4069), 19 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:43,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:43,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:36:43,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:44,637 INFO L130 PetriNetUnfolder]: 1217/2179 cut-off events. [2022-12-13 15:36:44,637 INFO L131 PetriNetUnfolder]: For 129600/129600 co-relation queries the response was YES. [2022-12-13 15:36:44,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32809 conditions, 2179 events. 1217/2179 cut-off events. For 129600/129600 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 13221 event pairs, 51 based on Foata normal form. 4/2183 useless extension candidates. Maximal degree in co-relation 32624. Up to 818 conditions per place. [2022-12-13 15:36:44,662 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 143 selfloop transitions, 398 changer transitions 5/546 dead transitions. [2022-12-13 15:36:44,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 546 transitions, 17355 flow [2022-12-13 15:36:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:36:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:36:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3909 transitions. [2022-12-13 15:36:44,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38988629563135846 [2022-12-13 15:36:44,665 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3909 transitions. [2022-12-13 15:36:44,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3909 transitions. [2022-12-13 15:36:44,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:44,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3909 transitions. [2022-12-13 15:36:44,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 217.16666666666666) internal successors, (3909), 18 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:44,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:44,671 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:44,671 INFO L175 Difference]: Start difference. First operand has 323 places, 424 transitions, 13177 flow. Second operand 18 states and 3909 transitions. [2022-12-13 15:36:44,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 546 transitions, 17355 flow [2022-12-13 15:36:45,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 546 transitions, 16699 flow, removed 49 selfloop flow, removed 10 redundant places. [2022-12-13 15:36:45,039 INFO L231 Difference]: Finished difference. Result has 332 places, 473 transitions, 15231 flow [2022-12-13 15:36:45,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=12618, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15231, PETRI_PLACES=332, PETRI_TRANSITIONS=473} [2022-12-13 15:36:45,040 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2022-12-13 15:36:45,040 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 473 transitions, 15231 flow [2022-12-13 15:36:45,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 214.1578947368421) internal successors, (4069), 19 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:45,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:45,040 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:45,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 15:36:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:45,241 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash 24635652, now seen corresponding path program 39 times [2022-12-13 15:36:45,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:45,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969266691] [2022-12-13 15:36:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969266691] [2022-12-13 15:36:45,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969266691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104264243] [2022-12-13 15:36:45,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:36:45,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:45,745 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:45,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 15:36:45,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:36:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:46,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-12-13 15:36:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:46,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:46,161 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:36:46,161 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 82 treesize of output 107 [2022-12-13 15:36:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:46,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104264243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:46,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:46,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-13 15:36:46,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491162734] [2022-12-13 15:36:46,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:46,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:36:46,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:36:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:36:46,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:36:46,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 473 transitions, 15231 flow. Second operand has 19 states, 19 states have (on average 212.21052631578948) internal successors, (4032), 19 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:46,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:46,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:36:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:48,156 INFO L130 PetriNetUnfolder]: 1243/2223 cut-off events. [2022-12-13 15:36:48,156 INFO L131 PetriNetUnfolder]: For 135339/135339 co-relation queries the response was YES. [2022-12-13 15:36:48,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33848 conditions, 2223 events. 1243/2223 cut-off events. For 135339/135339 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 13562 event pairs, 206 based on Foata normal form. 4/2227 useless extension candidates. Maximal degree in co-relation 33666. Up to 1135 conditions per place. [2022-12-13 15:36:48,182 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 186 selfloop transitions, 333 changer transitions 4/523 dead transitions. [2022-12-13 15:36:48,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 523 transitions, 17262 flow [2022-12-13 15:36:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:36:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:36:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3008 transitions. [2022-12-13 15:36:48,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3857399333162349 [2022-12-13 15:36:48,185 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3008 transitions. [2022-12-13 15:36:48,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3008 transitions. [2022-12-13 15:36:48,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:48,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3008 transitions. [2022-12-13 15:36:48,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 214.85714285714286) internal successors, (3008), 14 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:48,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:48,190 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:48,190 INFO L175 Difference]: Start difference. First operand has 332 places, 473 transitions, 15231 flow. Second operand 14 states and 3008 transitions. [2022-12-13 15:36:48,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 523 transitions, 17262 flow [2022-12-13 15:36:48,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 523 transitions, 16793 flow, removed 116 selfloop flow, removed 10 redundant places. [2022-12-13 15:36:48,633 INFO L231 Difference]: Finished difference. Result has 337 places, 478 transitions, 15925 flow [2022-12-13 15:36:48,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=14786, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15925, PETRI_PLACES=337, PETRI_TRANSITIONS=478} [2022-12-13 15:36:48,633 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 314 predicate places. [2022-12-13 15:36:48,634 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 478 transitions, 15925 flow [2022-12-13 15:36:48,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 212.21052631578948) internal successors, (4032), 19 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:48,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:48,634 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:48,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:48,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 15:36:48,835 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1346415872, now seen corresponding path program 40 times [2022-12-13 15:36:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:48,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626536841] [2022-12-13 15:36:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:36:49,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:49,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626536841] [2022-12-13 15:36:49,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626536841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:49,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599101367] [2022-12-13 15:36:49,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:36:49,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:49,819 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:49,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 15:36:50,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:36:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:50,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:50,351 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:36:50,352 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 82 treesize of output 107 [2022-12-13 15:36:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:50,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599101367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:50,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:50,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 28 [2022-12-13 15:36:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666502504] [2022-12-13 15:36:50,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 15:36:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 15:36:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-12-13 15:36:51,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 557 [2022-12-13 15:36:51,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 478 transitions, 15925 flow. Second operand has 28 states, 28 states have (on average 200.85714285714286) internal successors, (5624), 28 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:51,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:51,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 557 [2022-12-13 15:36:51,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:53,604 INFO L130 PetriNetUnfolder]: 1287/2297 cut-off events. [2022-12-13 15:36:53,604 INFO L131 PetriNetUnfolder]: For 147414/147414 co-relation queries the response was YES. [2022-12-13 15:36:53,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35585 conditions, 2297 events. 1287/2297 cut-off events. For 147414/147414 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 14043 event pairs, 214 based on Foata normal form. 4/2301 useless extension candidates. Maximal degree in co-relation 35408. Up to 1158 conditions per place. [2022-12-13 15:36:53,632 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 182 selfloop transitions, 348 changer transitions 4/534 dead transitions. [2022-12-13 15:36:53,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 534 transitions, 18158 flow [2022-12-13 15:36:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:36:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:36:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4459 transitions. [2022-12-13 15:36:53,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3638811816549698 [2022-12-13 15:36:53,635 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4459 transitions. [2022-12-13 15:36:53,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4459 transitions. [2022-12-13 15:36:53,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:53,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4459 transitions. [2022-12-13 15:36:53,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 202.6818181818182) internal successors, (4459), 22 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:53,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 557.0) internal successors, (12811), 23 states have internal predecessors, (12811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:53,643 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 557.0) internal successors, (12811), 23 states have internal predecessors, (12811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:53,643 INFO L175 Difference]: Start difference. First operand has 337 places, 478 transitions, 15925 flow. Second operand 22 states and 4459 transitions. [2022-12-13 15:36:53,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 534 transitions, 18158 flow [2022-12-13 15:36:54,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 534 transitions, 17767 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-12-13 15:36:54,042 INFO L231 Difference]: Finished difference. Result has 352 places, 488 transitions, 16931 flow [2022-12-13 15:36:54,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=15540, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=16931, PETRI_PLACES=352, PETRI_TRANSITIONS=488} [2022-12-13 15:36:54,042 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 329 predicate places. [2022-12-13 15:36:54,042 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 488 transitions, 16931 flow [2022-12-13 15:36:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 200.85714285714286) internal successors, (5624), 28 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:54,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:54,043 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:54,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 15:36:54,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 15:36:54,244 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash -648849440, now seen corresponding path program 41 times [2022-12-13 15:36:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:54,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128377516] [2022-12-13 15:36:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:54,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128377516] [2022-12-13 15:36:54,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128377516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397769320] [2022-12-13 15:36:54,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:36:54,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:54,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:54,738 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:54,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 15:36:54,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:36:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:36:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:55,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-12-13 15:36:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:55,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:55,169 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:36:55,170 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 70 treesize of output 72 [2022-12-13 15:36:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:55,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397769320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:55,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:55,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-13 15:36:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595185188] [2022-12-13 15:36:55,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:55,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:36:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:36:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:36:55,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:36:55,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 488 transitions, 16931 flow. Second operand has 19 states, 19 states have (on average 212.21052631578948) internal successors, (4032), 19 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:55,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:55,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:36:55,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:56,981 INFO L130 PetriNetUnfolder]: 1354/2412 cut-off events. [2022-12-13 15:36:56,982 INFO L131 PetriNetUnfolder]: For 164672/164672 co-relation queries the response was YES. [2022-12-13 15:36:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38626 conditions, 2412 events. 1354/2412 cut-off events. For 164672/164672 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 14928 event pairs, 53 based on Foata normal form. 4/2416 useless extension candidates. Maximal degree in co-relation 38439. Up to 929 conditions per place. [2022-12-13 15:36:57,012 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 135 selfloop transitions, 420 changer transitions 5/560 dead transitions. [2022-12-13 15:36:57,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 560 transitions, 19705 flow [2022-12-13 15:36:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:36:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:36:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2803 transitions. [2022-12-13 15:36:57,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3871012291120011 [2022-12-13 15:36:57,014 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2803 transitions. [2022-12-13 15:36:57,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2803 transitions. [2022-12-13 15:36:57,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:57,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2803 transitions. [2022-12-13 15:36:57,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 215.6153846153846) internal successors, (2803), 13 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:57,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:57,019 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:57,019 INFO L175 Difference]: Start difference. First operand has 352 places, 488 transitions, 16931 flow. Second operand 13 states and 2803 transitions. [2022-12-13 15:36:57,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 560 transitions, 19705 flow [2022-12-13 15:36:57,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 560 transitions, 19511 flow, removed 11 selfloop flow, removed 15 redundant places. [2022-12-13 15:36:57,519 INFO L231 Difference]: Finished difference. Result has 351 places, 502 transitions, 18409 flow [2022-12-13 15:36:57,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=16737, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18409, PETRI_PLACES=351, PETRI_TRANSITIONS=502} [2022-12-13 15:36:57,520 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 328 predicate places. [2022-12-13 15:36:57,520 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 502 transitions, 18409 flow [2022-12-13 15:36:57,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 212.21052631578948) internal successors, (4032), 19 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:57,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:57,521 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:57,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-13 15:36:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 15:36:57,721 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -899061746, now seen corresponding path program 42 times [2022-12-13 15:36:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266146902] [2022-12-13 15:36:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266146902] [2022-12-13 15:36:58,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266146902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967433833] [2022-12-13 15:36:58,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:36:58,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:58,314 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:58,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 15:36:58,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:36:58,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:36:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:58,645 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:36:58,645 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 26 treesize of output 14 [2022-12-13 15:36:58,652 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:36:58,653 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 25 treesize of output 9 [2022-12-13 15:36:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:58,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:58,882 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:36:58,882 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 82 treesize of output 107 [2022-12-13 15:36:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:36:58,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967433833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:58,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:58,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-13 15:36:58,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791215723] [2022-12-13 15:36:58,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:58,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:36:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:36:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:36:59,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:36:59,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 502 transitions, 18409 flow. Second operand has 21 states, 21 states have (on average 213.1904761904762) internal successors, (4477), 21 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:59,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:59,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:36:59,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:01,409 INFO L130 PetriNetUnfolder]: 1374/2454 cut-off events. [2022-12-13 15:37:01,409 INFO L131 PetriNetUnfolder]: For 185433/185433 co-relation queries the response was YES. [2022-12-13 15:37:01,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40571 conditions, 2454 events. 1374/2454 cut-off events. For 185433/185433 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 15237 event pairs, 233 based on Foata normal form. 8/2462 useless extension candidates. Maximal degree in co-relation 40385. Up to 1297 conditions per place. [2022-12-13 15:37:01,438 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 243 selfloop transitions, 316 changer transitions 7/566 dead transitions. [2022-12-13 15:37:01,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 566 transitions, 20698 flow [2022-12-13 15:37:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:37:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:37:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3891 transitions. [2022-12-13 15:37:01,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38809096349491323 [2022-12-13 15:37:01,441 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3891 transitions. [2022-12-13 15:37:01,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3891 transitions. [2022-12-13 15:37:01,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:01,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3891 transitions. [2022-12-13 15:37:01,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 216.16666666666666) internal successors, (3891), 18 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:01,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:01,448 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:01,448 INFO L175 Difference]: Start difference. First operand has 351 places, 502 transitions, 18409 flow. Second operand 18 states and 3891 transitions. [2022-12-13 15:37:01,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 566 transitions, 20698 flow [2022-12-13 15:37:01,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 566 transitions, 20162 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 15:37:01,978 INFO L231 Difference]: Finished difference. Result has 364 places, 505 transitions, 19016 flow [2022-12-13 15:37:01,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=17863, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=19016, PETRI_PLACES=364, PETRI_TRANSITIONS=505} [2022-12-13 15:37:01,979 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 341 predicate places. [2022-12-13 15:37:01,979 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 505 transitions, 19016 flow [2022-12-13 15:37:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 213.1904761904762) internal successors, (4477), 21 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:01,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:01,980 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:01,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 15:37:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:02,181 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1064760388, now seen corresponding path program 43 times [2022-12-13 15:37:02,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810684306] [2022-12-13 15:37:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810684306] [2022-12-13 15:37:02,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810684306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103784485] [2022-12-13 15:37:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:37:02,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:02,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:02,716 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:02,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 15:37:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:37:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:02,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:02,969 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 46 treesize of output 30 [2022-12-13 15:37:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:03,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:03,210 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:37:03,211 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 [2022-12-13 15:37:03,223 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:37:03,223 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 [2022-12-13 15:37:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:03,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103784485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:03,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:03,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-13 15:37:03,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354164684] [2022-12-13 15:37:03,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:03,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:37:03,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:03,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:37:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:37:03,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:37:03,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 505 transitions, 19016 flow. Second operand has 19 states, 19 states have (on average 213.1578947368421) internal successors, (4050), 19 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:03,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:03,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:37:03,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:05,304 INFO L130 PetriNetUnfolder]: 1391/2479 cut-off events. [2022-12-13 15:37:05,305 INFO L131 PetriNetUnfolder]: For 202582/202582 co-relation queries the response was YES. [2022-12-13 15:37:05,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42033 conditions, 2479 events. 1391/2479 cut-off events. For 202582/202582 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 15393 event pairs, 228 based on Foata normal form. 4/2483 useless extension candidates. Maximal degree in co-relation 41844. Up to 1224 conditions per place. [2022-12-13 15:37:05,338 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 186 selfloop transitions, 363 changer transitions 5/554 dead transitions. [2022-12-13 15:37:05,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 554 transitions, 21022 flow [2022-12-13 15:37:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:37:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:37:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2816 transitions. [2022-12-13 15:37:05,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38889656124844635 [2022-12-13 15:37:05,341 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2816 transitions. [2022-12-13 15:37:05,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2816 transitions. [2022-12-13 15:37:05,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:05,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2816 transitions. [2022-12-13 15:37:05,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 216.6153846153846) internal successors, (2816), 13 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:05,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:05,346 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:05,346 INFO L175 Difference]: Start difference. First operand has 364 places, 505 transitions, 19016 flow. Second operand 13 states and 2816 transitions. [2022-12-13 15:37:05,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 554 transitions, 21022 flow [2022-12-13 15:37:05,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 554 transitions, 20883 flow, removed 46 selfloop flow, removed 10 redundant places. [2022-12-13 15:37:05,950 INFO L231 Difference]: Finished difference. Result has 366 places, 509 transitions, 20126 flow [2022-12-13 15:37:05,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=18895, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20126, PETRI_PLACES=366, PETRI_TRANSITIONS=509} [2022-12-13 15:37:05,950 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 343 predicate places. [2022-12-13 15:37:05,950 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 509 transitions, 20126 flow [2022-12-13 15:37:05,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 213.1578947368421) internal successors, (4050), 19 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:05,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:05,951 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:05,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-13 15:37:06,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:06,152 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1184720036, now seen corresponding path program 44 times [2022-12-13 15:37:06,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:06,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344890842] [2022-12-13 15:37:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:06,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:06,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344890842] [2022-12-13 15:37:06,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344890842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:06,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185868027] [2022-12-13 15:37:06,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:37:06,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:06,761 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:06,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 15:37:06,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:37:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:37:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:07,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-12-13 15:37:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:07,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:07,272 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:37:07,273 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 70 treesize of output 72 [2022-12-13 15:37:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:07,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185868027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:07,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:07,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-13 15:37:07,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189565883] [2022-12-13 15:37:07,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:07,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:37:07,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:37:07,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:37:07,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:37:07,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 509 transitions, 20126 flow. Second operand has 21 states, 21 states have (on average 212.04761904761904) internal successors, (4453), 21 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:07,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:07,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:37:07,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:09,656 INFO L130 PetriNetUnfolder]: 1463/2599 cut-off events. [2022-12-13 15:37:09,657 INFO L131 PetriNetUnfolder]: For 229795/229795 co-relation queries the response was YES. [2022-12-13 15:37:09,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45616 conditions, 2599 events. 1463/2599 cut-off events. For 229795/229795 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 16189 event pairs, 55 based on Foata normal form. 4/2603 useless extension candidates. Maximal degree in co-relation 45425. Up to 1006 conditions per place. [2022-12-13 15:37:09,690 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 138 selfloop transitions, 442 changer transitions 5/585 dead transitions. [2022-12-13 15:37:09,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 585 transitions, 23073 flow [2022-12-13 15:37:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:37:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:37:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3445 transitions. [2022-12-13 15:37:09,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3865574506283663 [2022-12-13 15:37:09,692 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3445 transitions. [2022-12-13 15:37:09,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3445 transitions. [2022-12-13 15:37:09,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:09,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3445 transitions. [2022-12-13 15:37:09,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 215.3125) internal successors, (3445), 16 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:09,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:09,698 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:09,698 INFO L175 Difference]: Start difference. First operand has 366 places, 509 transitions, 20126 flow. Second operand 16 states and 3445 transitions. [2022-12-13 15:37:09,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 585 transitions, 23073 flow [2022-12-13 15:37:10,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 585 transitions, 22858 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-12-13 15:37:10,400 INFO L231 Difference]: Finished difference. Result has 376 places, 521 transitions, 21691 flow [2022-12-13 15:37:10,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=19911, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21691, PETRI_PLACES=376, PETRI_TRANSITIONS=521} [2022-12-13 15:37:10,400 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 353 predicate places. [2022-12-13 15:37:10,401 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 521 transitions, 21691 flow [2022-12-13 15:37:10,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 212.04761904761904) internal successors, (4453), 21 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:10,401 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:10,401 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:10,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-13 15:37:10,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-13 15:37:10,603 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1390471530, now seen corresponding path program 45 times [2022-12-13 15:37:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836054346] [2022-12-13 15:37:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:10,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836054346] [2022-12-13 15:37:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836054346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842201356] [2022-12-13 15:37:11,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:37:11,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:11,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:11,169 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:11,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 15:37:11,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:37:11,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:37:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:11,475 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:37:11,475 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 26 treesize of output 14 [2022-12-13 15:37:11,482 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:37:11,482 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 25 treesize of output 9 [2022-12-13 15:37:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:11,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:11,683 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:37:11,683 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 70 treesize of output 72 [2022-12-13 15:37:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:11,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842201356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:11,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:11,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-13 15:37:11,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601452970] [2022-12-13 15:37:11,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:11,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:37:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:37:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:37:12,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:37:12,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 521 transitions, 21691 flow. Second operand has 21 states, 21 states have (on average 213.04761904761904) internal successors, (4474), 21 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:12,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:12,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:37:12,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:15,019 INFO L130 PetriNetUnfolder]: 1529/2715 cut-off events. [2022-12-13 15:37:15,019 INFO L131 PetriNetUnfolder]: For 259431/259431 co-relation queries the response was YES. [2022-12-13 15:37:15,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49261 conditions, 2715 events. 1529/2715 cut-off events. For 259431/259431 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 17020 event pairs, 51 based on Foata normal form. 4/2719 useless extension candidates. Maximal degree in co-relation 49065. Up to 1052 conditions per place. [2022-12-13 15:37:15,054 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 159 selfloop transitions, 447 changer transitions 7/613 dead transitions. [2022-12-13 15:37:15,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 613 transitions, 24898 flow [2022-12-13 15:37:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:37:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:37:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4327 transitions. [2022-12-13 15:37:15,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3884201077199282 [2022-12-13 15:37:15,057 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4327 transitions. [2022-12-13 15:37:15,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4327 transitions. [2022-12-13 15:37:15,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:15,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4327 transitions. [2022-12-13 15:37:15,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 216.35) internal successors, (4327), 20 states have internal predecessors, (4327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:15,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:15,064 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:15,064 INFO L175 Difference]: Start difference. First operand has 376 places, 521 transitions, 21691 flow. Second operand 20 states and 4327 transitions. [2022-12-13 15:37:15,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 613 transitions, 24898 flow [2022-12-13 15:37:15,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 613 transitions, 24428 flow, removed 14 selfloop flow, removed 12 redundant places. [2022-12-13 15:37:15,827 INFO L231 Difference]: Finished difference. Result has 386 places, 533 transitions, 23009 flow [2022-12-13 15:37:15,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=21222, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=23009, PETRI_PLACES=386, PETRI_TRANSITIONS=533} [2022-12-13 15:37:15,828 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 363 predicate places. [2022-12-13 15:37:15,828 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 533 transitions, 23009 flow [2022-12-13 15:37:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 213.04761904761904) internal successors, (4474), 21 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:15,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:15,828 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:15,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 15:37:16,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:16,030 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1844730828, now seen corresponding path program 46 times [2022-12-13 15:37:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:16,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595587656] [2022-12-13 15:37:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:16,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:16,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595587656] [2022-12-13 15:37:16,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595587656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039925334] [2022-12-13 15:37:16,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:37:16,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:16,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:16,554 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 15:37:16,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:37:16,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:16,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:37:16,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:16,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-12-13 15:37:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:16,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:17,049 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:37:17,049 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 [2022-12-13 15:37:17,065 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:37:17,066 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 [2022-12-13 15:37:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:17,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039925334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:17,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:17,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-13 15:37:17,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628783704] [2022-12-13 15:37:17,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:37:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:37:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:37:17,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:37:17,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 533 transitions, 23009 flow. Second operand has 19 states, 19 states have (on average 212.26315789473685) internal successors, (4033), 19 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:17,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:17,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:37:17,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:19,238 INFO L130 PetriNetUnfolder]: 1547/2745 cut-off events. [2022-12-13 15:37:19,238 INFO L131 PetriNetUnfolder]: For 284982/284982 co-relation queries the response was YES. [2022-12-13 15:37:19,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51075 conditions, 2745 events. 1547/2745 cut-off events. For 284982/284982 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 17225 event pairs, 273 based on Foata normal form. 4/2749 useless extension candidates. Maximal degree in co-relation 50877. Up to 1422 conditions per place. [2022-12-13 15:37:19,275 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 179 selfloop transitions, 386 changer transitions 4/569 dead transitions. [2022-12-13 15:37:19,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 569 transitions, 24889 flow [2022-12-13 15:37:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:37:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:37:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2366 transitions. [2022-12-13 15:37:19,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3861596213481312 [2022-12-13 15:37:19,277 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2366 transitions. [2022-12-13 15:37:19,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2366 transitions. [2022-12-13 15:37:19,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:19,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2366 transitions. [2022-12-13 15:37:19,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 215.0909090909091) internal successors, (2366), 11 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:19,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:19,281 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:19,281 INFO L175 Difference]: Start difference. First operand has 386 places, 533 transitions, 23009 flow. Second operand 11 states and 2366 transitions. [2022-12-13 15:37:19,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 569 transitions, 24889 flow [2022-12-13 15:37:20,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 569 transitions, 23949 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-12-13 15:37:20,102 INFO L231 Difference]: Finished difference. Result has 382 places, 536 transitions, 23348 flow [2022-12-13 15:37:20,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=22069, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23348, PETRI_PLACES=382, PETRI_TRANSITIONS=536} [2022-12-13 15:37:20,102 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 359 predicate places. [2022-12-13 15:37:20,102 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 536 transitions, 23348 flow [2022-12-13 15:37:20,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 212.26315789473685) internal successors, (4033), 19 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:20,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:20,103 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:20,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-13 15:37:20,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:20,304 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -695777660, now seen corresponding path program 47 times [2022-12-13 15:37:20,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459175226] [2022-12-13 15:37:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:20,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459175226] [2022-12-13 15:37:20,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459175226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932986582] [2022-12-13 15:37:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:37:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:20,884 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:20,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 15:37:21,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:37:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:37:21,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:21,256 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:37:21,256 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 26 treesize of output 14 [2022-12-13 15:37:21,263 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:37:21,263 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 25 treesize of output 9 [2022-12-13 15:37:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:21,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:21,474 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:37:21,474 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 [2022-12-13 15:37:21,488 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:37:21,488 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 [2022-12-13 15:37:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:21,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932986582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:21,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:21,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:37:21,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830314506] [2022-12-13 15:37:21,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:21,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:37:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:37:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:37:22,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:37:22,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 536 transitions, 23348 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:22,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:22,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:37:22,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:23,846 INFO L130 PetriNetUnfolder]: 1551/2757 cut-off events. [2022-12-13 15:37:23,846 INFO L131 PetriNetUnfolder]: For 302881/302881 co-relation queries the response was YES. [2022-12-13 15:37:23,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51787 conditions, 2757 events. 1551/2757 cut-off events. For 302881/302881 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 17376 event pairs, 269 based on Foata normal form. 8/2765 useless extension candidates. Maximal degree in co-relation 51587. Up to 1490 conditions per place. [2022-12-13 15:37:23,883 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 235 selfloop transitions, 347 changer transitions 7/589 dead transitions. [2022-12-13 15:37:23,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 589 transitions, 25546 flow [2022-12-13 15:37:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:37:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:37:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3031 transitions. [2022-12-13 15:37:23,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388689407540395 [2022-12-13 15:37:23,885 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3031 transitions. [2022-12-13 15:37:23,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3031 transitions. [2022-12-13 15:37:23,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:23,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3031 transitions. [2022-12-13 15:37:23,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 216.5) internal successors, (3031), 14 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:23,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:23,890 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:23,890 INFO L175 Difference]: Start difference. First operand has 382 places, 536 transitions, 23348 flow. Second operand 14 states and 3031 transitions. [2022-12-13 15:37:23,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 589 transitions, 25546 flow [2022-12-13 15:37:24,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 589 transitions, 25396 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 15:37:24,769 INFO L231 Difference]: Finished difference. Result has 391 places, 539 transitions, 24124 flow [2022-12-13 15:37:24,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=23198, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24124, PETRI_PLACES=391, PETRI_TRANSITIONS=539} [2022-12-13 15:37:24,769 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 368 predicate places. [2022-12-13 15:37:24,769 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 539 transitions, 24124 flow [2022-12-13 15:37:24,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:24,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:24,770 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:24,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-13 15:37:24,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 15:37:24,971 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash -34230844, now seen corresponding path program 48 times [2022-12-13 15:37:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447700068] [2022-12-13 15:37:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:24,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447700068] [2022-12-13 15:37:25,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447700068] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851905493] [2022-12-13 15:37:25,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:37:25,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:25,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:25,569 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:25,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 15:37:25,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:37:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:37:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:25,887 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:37:25,887 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 26 treesize of output 14 [2022-12-13 15:37:25,894 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:37:25,894 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 25 treesize of output 9 [2022-12-13 15:37:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:25,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:26,123 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:37:26,124 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 82 treesize of output 107 [2022-12-13 15:37:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:26,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851905493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:26,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:26,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:37:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328476785] [2022-12-13 15:37:26,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:37:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:37:26,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:37:26,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:37:26,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 539 transitions, 24124 flow. Second operand has 20 states, 20 states have (on average 213.1) internal successors, (4262), 20 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:26,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:26,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:37:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:28,772 INFO L130 PetriNetUnfolder]: 1556/2750 cut-off events. [2022-12-13 15:37:28,773 INFO L131 PetriNetUnfolder]: For 320162/320162 co-relation queries the response was YES. [2022-12-13 15:37:28,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53204 conditions, 2750 events. 1556/2750 cut-off events. For 320162/320162 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 17218 event pairs, 240 based on Foata normal form. 4/2754 useless extension candidates. Maximal degree in co-relation 53000. Up to 1324 conditions per place. [2022-12-13 15:37:28,810 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 192 selfloop transitions, 394 changer transitions 4/590 dead transitions. [2022-12-13 15:37:28,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 590 transitions, 26285 flow [2022-12-13 15:37:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:37:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:37:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3882 transitions. [2022-12-13 15:37:28,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3871932974266906 [2022-12-13 15:37:28,813 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3882 transitions. [2022-12-13 15:37:28,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3882 transitions. [2022-12-13 15:37:28,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:28,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3882 transitions. [2022-12-13 15:37:28,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.66666666666666) internal successors, (3882), 18 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:28,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:28,819 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:28,819 INFO L175 Difference]: Start difference. First operand has 391 places, 539 transitions, 24124 flow. Second operand 18 states and 3882 transitions. [2022-12-13 15:37:28,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 590 transitions, 26285 flow [2022-12-13 15:37:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 590 transitions, 26041 flow, removed 44 selfloop flow, removed 12 redundant places. [2022-12-13 15:37:29,749 INFO L231 Difference]: Finished difference. Result has 395 places, 542 transitions, 24908 flow [2022-12-13 15:37:29,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=23870, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24908, PETRI_PLACES=395, PETRI_TRANSITIONS=542} [2022-12-13 15:37:29,750 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 372 predicate places. [2022-12-13 15:37:29,750 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 542 transitions, 24908 flow [2022-12-13 15:37:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.1) internal successors, (4262), 20 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:29,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:29,750 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:29,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-13 15:37:29,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:29,952 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 607923180, now seen corresponding path program 49 times [2022-12-13 15:37:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:29,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883031173] [2022-12-13 15:37:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:30,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:30,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883031173] [2022-12-13 15:37:30,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883031173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:30,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933192979] [2022-12-13 15:37:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:37:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:30,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:30,547 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:30,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 15:37:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:37:30,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:30,910 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:37:30,911 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 26 treesize of output 14 [2022-12-13 15:37:30,918 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:37:30,918 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 25 treesize of output 9 [2022-12-13 15:37:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:30,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:31,153 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:37:31,154 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 70 treesize of output 72 [2022-12-13 15:37:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:31,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933192979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:31,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:31,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:37:31,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562365403] [2022-12-13 15:37:31,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:37:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:37:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:37:32,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:37:32,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 542 transitions, 24908 flow. Second operand has 22 states, 22 states have (on average 213.1818181818182) internal successors, (4690), 22 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:32,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:32,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:37:32,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:34,463 INFO L130 PetriNetUnfolder]: 1546/2730 cut-off events. [2022-12-13 15:37:34,463 INFO L131 PetriNetUnfolder]: For 326238/326238 co-relation queries the response was YES. [2022-12-13 15:37:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53781 conditions, 2730 events. 1546/2730 cut-off events. For 326238/326238 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 17079 event pairs, 45 based on Foata normal form. 4/2734 useless extension candidates. Maximal degree in co-relation 53579. Up to 1065 conditions per place. [2022-12-13 15:37:34,500 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 202 selfloop transitions, 406 changer transitions 8/616 dead transitions. [2022-12-13 15:37:34,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 616 transitions, 27352 flow [2022-12-13 15:37:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:37:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 15:37:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3683 transitions. [2022-12-13 15:37:34,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3889534269722252 [2022-12-13 15:37:34,503 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3683 transitions. [2022-12-13 15:37:34,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3683 transitions. [2022-12-13 15:37:34,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:34,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3683 transitions. [2022-12-13 15:37:34,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 216.64705882352942) internal successors, (3683), 17 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:34,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 557.0) internal successors, (10026), 18 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:34,510 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 557.0) internal successors, (10026), 18 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:34,510 INFO L175 Difference]: Start difference. First operand has 395 places, 542 transitions, 24908 flow. Second operand 17 states and 3683 transitions. [2022-12-13 15:37:34,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 616 transitions, 27352 flow [2022-12-13 15:37:35,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 616 transitions, 27110 flow, removed 20 selfloop flow, removed 13 redundant places. [2022-12-13 15:37:35,418 INFO L231 Difference]: Finished difference. Result has 397 places, 544 transitions, 25532 flow [2022-12-13 15:37:35,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=24637, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25532, PETRI_PLACES=397, PETRI_TRANSITIONS=544} [2022-12-13 15:37:35,419 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 374 predicate places. [2022-12-13 15:37:35,419 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 544 transitions, 25532 flow [2022-12-13 15:37:35,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 213.1818181818182) internal successors, (4690), 22 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:35,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:35,419 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:35,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-13 15:37:35,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 15:37:35,621 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash -97249468, now seen corresponding path program 50 times [2022-12-13 15:37:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172550212] [2022-12-13 15:37:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:36,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172550212] [2022-12-13 15:37:36,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172550212] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790914849] [2022-12-13 15:37:36,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:37:36,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:36,181 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:36,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 15:37:36,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:37:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:37:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:36,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:36,471 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 58 treesize of output 51 [2022-12-13 15:37:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:36,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:36,694 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:37:36,694 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 [2022-12-13 15:37:36,707 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:37:36,708 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 [2022-12-13 15:37:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:36,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790914849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:36,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:36,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:37:36,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238641139] [2022-12-13 15:37:36,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:37:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:37:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:37:37,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:37:37,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 544 transitions, 25532 flow. Second operand has 20 states, 20 states have (on average 212.15) internal successors, (4243), 20 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:37,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:37,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:37:37,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:39,305 INFO L130 PetriNetUnfolder]: 1540/2709 cut-off events. [2022-12-13 15:37:39,305 INFO L131 PetriNetUnfolder]: For 343432/343432 co-relation queries the response was YES. [2022-12-13 15:37:39,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54626 conditions, 2709 events. 1540/2709 cut-off events. For 343432/343432 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 16837 event pairs, 241 based on Foata normal form. 4/2713 useless extension candidates. Maximal degree in co-relation 54470. Up to 1333 conditions per place. [2022-12-13 15:37:39,342 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 184 selfloop transitions, 394 changer transitions 4/582 dead transitions. [2022-12-13 15:37:39,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 582 transitions, 27389 flow [2022-12-13 15:37:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:37:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:37:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3008 transitions. [2022-12-13 15:37:39,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3857399333162349 [2022-12-13 15:37:39,344 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3008 transitions. [2022-12-13 15:37:39,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3008 transitions. [2022-12-13 15:37:39,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:39,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3008 transitions. [2022-12-13 15:37:39,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 214.85714285714286) internal successors, (3008), 14 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:39,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:39,350 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:39,350 INFO L175 Difference]: Start difference. First operand has 397 places, 544 transitions, 25532 flow. Second operand 14 states and 3008 transitions. [2022-12-13 15:37:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 582 transitions, 27389 flow [2022-12-13 15:37:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 582 transitions, 26751 flow, removed 9 selfloop flow, removed 14 redundant places. [2022-12-13 15:37:40,216 INFO L231 Difference]: Finished difference. Result has 394 places, 545 transitions, 25786 flow [2022-12-13 15:37:40,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=24879, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=25786, PETRI_PLACES=394, PETRI_TRANSITIONS=545} [2022-12-13 15:37:40,216 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 371 predicate places. [2022-12-13 15:37:40,217 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 545 transitions, 25786 flow [2022-12-13 15:37:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.15) internal successors, (4243), 20 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:40,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:40,217 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:40,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-13 15:37:40,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 15:37:40,419 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash 901183522, now seen corresponding path program 51 times [2022-12-13 15:37:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:40,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212158265] [2022-12-13 15:37:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:41,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:41,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212158265] [2022-12-13 15:37:41,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212158265] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:41,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748951311] [2022-12-13 15:37:41,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:37:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:41,173 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:41,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 15:37:41,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:37:41,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:37:41,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:41,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:41,595 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:37:41,595 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 [2022-12-13 15:37:41,609 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:37:41,609 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 [2022-12-13 15:37:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:41,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748951311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:41,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:41,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:37:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063285749] [2022-12-13 15:37:41,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:41,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:37:41,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:37:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:37:42,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:37:42,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 545 transitions, 25786 flow. Second operand has 20 states, 20 states have (on average 212.2) internal successors, (4244), 20 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:42,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:42,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:37:42,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:43,566 INFO L130 PetriNetUnfolder]: 1536/2705 cut-off events. [2022-12-13 15:37:43,566 INFO L131 PetriNetUnfolder]: For 339810/339810 co-relation queries the response was YES. [2022-12-13 15:37:43,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54502 conditions, 2705 events. 1536/2705 cut-off events. For 339810/339810 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 16833 event pairs, 361 based on Foata normal form. 4/2709 useless extension candidates. Maximal degree in co-relation 54301. Up to 1958 conditions per place. [2022-12-13 15:37:43,604 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 261 selfloop transitions, 307 changer transitions 11/579 dead transitions. [2022-12-13 15:37:43,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 579 transitions, 27388 flow [2022-12-13 15:37:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:37:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:37:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2369 transitions. [2022-12-13 15:37:43,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38664925738534356 [2022-12-13 15:37:43,606 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2369 transitions. [2022-12-13 15:37:43,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2369 transitions. [2022-12-13 15:37:43,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:43,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2369 transitions. [2022-12-13 15:37:43,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 215.36363636363637) internal successors, (2369), 11 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:43,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:43,610 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:43,610 INFO L175 Difference]: Start difference. First operand has 394 places, 545 transitions, 25786 flow. Second operand 11 states and 2369 transitions. [2022-12-13 15:37:43,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 579 transitions, 27388 flow [2022-12-13 15:37:44,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 579 transitions, 26898 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-12-13 15:37:44,512 INFO L231 Difference]: Finished difference. Result has 396 places, 545 transitions, 25921 flow [2022-12-13 15:37:44,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=25298, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=25921, PETRI_PLACES=396, PETRI_TRANSITIONS=545} [2022-12-13 15:37:44,512 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2022-12-13 15:37:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 545 transitions, 25921 flow [2022-12-13 15:37:44,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.2) internal successors, (4244), 20 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:44,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:44,513 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:44,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-13 15:37:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 15:37:44,714 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1670234238, now seen corresponding path program 52 times [2022-12-13 15:37:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:44,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590210083] [2022-12-13 15:37:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:45,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590210083] [2022-12-13 15:37:45,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590210083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515596802] [2022-12-13 15:37:45,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:37:45,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:45,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:45,310 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:45,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 15:37:45,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:37:45,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:37:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:45,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:45,581 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 35 [2022-12-13 15:37:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:45,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:45,785 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:37:45,785 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 [2022-12-13 15:37:45,796 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:37:45,796 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 [2022-12-13 15:37:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:45,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515596802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:45,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:45,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-13 15:37:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16427852] [2022-12-13 15:37:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:37:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:37:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:37:46,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:37:46,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 545 transitions, 25921 flow. Second operand has 19 states, 19 states have (on average 213.31578947368422) internal successors, (4053), 19 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:46,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:46,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:37:46,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:48,193 INFO L130 PetriNetUnfolder]: 1519/2665 cut-off events. [2022-12-13 15:37:48,193 INFO L131 PetriNetUnfolder]: For 346019/346019 co-relation queries the response was YES. [2022-12-13 15:37:48,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54203 conditions, 2665 events. 1519/2665 cut-off events. For 346019/346019 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 16507 event pairs, 243 based on Foata normal form. 4/2669 useless extension candidates. Maximal degree in co-relation 54000. Up to 1426 conditions per place. [2022-12-13 15:37:48,242 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 223 selfloop transitions, 355 changer transitions 7/585 dead transitions. [2022-12-13 15:37:48,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 585 transitions, 27685 flow [2022-12-13 15:37:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:37:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:37:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3237 transitions. [2022-12-13 15:37:48,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3874326750448833 [2022-12-13 15:37:48,246 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3237 transitions. [2022-12-13 15:37:48,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3237 transitions. [2022-12-13 15:37:48,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:48,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3237 transitions. [2022-12-13 15:37:48,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 215.8) internal successors, (3237), 15 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:48,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 557.0) internal successors, (8912), 16 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:48,255 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 557.0) internal successors, (8912), 16 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:48,255 INFO L175 Difference]: Start difference. First operand has 396 places, 545 transitions, 25921 flow. Second operand 15 states and 3237 transitions. [2022-12-13 15:37:48,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 585 transitions, 27685 flow [2022-12-13 15:37:49,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 585 transitions, 27281 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-12-13 15:37:49,231 INFO L231 Difference]: Finished difference. Result has 400 places, 543 transitions, 26175 flow [2022-12-13 15:37:49,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=25482, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=26175, PETRI_PLACES=400, PETRI_TRANSITIONS=543} [2022-12-13 15:37:49,232 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 377 predicate places. [2022-12-13 15:37:49,232 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 543 transitions, 26175 flow [2022-12-13 15:37:49,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 213.31578947368422) internal successors, (4053), 19 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:49,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:49,233 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:49,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-13 15:37:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:49,434 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -988573188, now seen corresponding path program 53 times [2022-12-13 15:37:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:49,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084811701] [2022-12-13 15:37:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:50,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084811701] [2022-12-13 15:37:50,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084811701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557355759] [2022-12-13 15:37:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:37:50,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:50,133 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:50,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 15:37:50,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:37:50,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:37:50,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:37:50,520 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 [2022-12-13 15:37:50,764 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 15:37:50,764 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 25 treesize of output 9 [2022-12-13 15:37:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:50,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:55,315 WARN L837 $PredicateComparison]: unable to prove that (and (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((~o_2~0.offset Int) (v_ArrVal_4101 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4101))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) ~o_2~0.offset)) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 ~o_2~0.offset)))))))) is different from false [2022-12-13 15:37:55,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:55,343 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 116 treesize of output 148 [2022-12-13 15:37:55,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:55,366 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 68 treesize of output 84 [2022-12-13 15:37:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:37:55,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557355759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:55,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:55,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2022-12-13 15:37:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144066758] [2022-12-13 15:37:55,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:55,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:37:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:37:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=879, Unknown=2, NotChecked=60, Total=1056 [2022-12-13 15:37:55,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 557 [2022-12-13 15:37:55,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 543 transitions, 26175 flow. Second operand has 33 states, 33 states have (on average 188.78787878787878) internal successors, (6230), 33 states have internal predecessors, (6230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:55,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:55,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 557 [2022-12-13 15:37:55,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:58,655 INFO L130 PetriNetUnfolder]: 1594/2861 cut-off events. [2022-12-13 15:37:58,655 INFO L131 PetriNetUnfolder]: For 453435/453435 co-relation queries the response was YES. [2022-12-13 15:37:58,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59630 conditions, 2861 events. 1594/2861 cut-off events. For 453435/453435 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 18565 event pairs, 120 based on Foata normal form. 6/2867 useless extension candidates. Maximal degree in co-relation 59490. Up to 2001 conditions per place. [2022-12-13 15:37:58,695 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 281 selfloop transitions, 368 changer transitions 1/650 dead transitions. [2022-12-13 15:37:58,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 650 transitions, 33186 flow [2022-12-13 15:37:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:37:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:37:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3450 transitions. [2022-12-13 15:37:58,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3441053261520048 [2022-12-13 15:37:58,698 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3450 transitions. [2022-12-13 15:37:58,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3450 transitions. [2022-12-13 15:37:58,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:58,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3450 transitions. [2022-12-13 15:37:58,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 191.66666666666666) internal successors, (3450), 18 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:58,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:58,704 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:58,704 INFO L175 Difference]: Start difference. First operand has 400 places, 543 transitions, 26175 flow. Second operand 18 states and 3450 transitions. [2022-12-13 15:37:58,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 650 transitions, 33186 flow [2022-12-13 15:37:59,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 650 transitions, 32708 flow, removed 1 selfloop flow, removed 13 redundant places. [2022-12-13 15:37:59,631 INFO L231 Difference]: Finished difference. Result has 407 places, 628 transitions, 32204 flow [2022-12-13 15:37:59,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=25762, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=32204, PETRI_PLACES=407, PETRI_TRANSITIONS=628} [2022-12-13 15:37:59,631 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 384 predicate places. [2022-12-13 15:37:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 628 transitions, 32204 flow [2022-12-13 15:37:59,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 188.78787878787878) internal successors, (6230), 33 states have internal predecessors, (6230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:59,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:59,632 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:59,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 15:37:59,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-12-13 15:37:59,833 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash 288023164, now seen corresponding path program 54 times [2022-12-13 15:37:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157263979] [2022-12-13 15:37:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:00,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157263979] [2022-12-13 15:38:00,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157263979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:00,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848388229] [2022-12-13 15:38:00,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:38:00,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:00,505 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:00,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 15:38:00,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:38:00,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:00,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:38:00,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:38:00,796 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 [2022-12-13 15:38:00,877 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:38:00,878 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 26 treesize of output 14 [2022-12-13 15:38:00,884 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:38:00,884 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 25 treesize of output 9 [2022-12-13 15:38:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:00,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:01,139 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4172 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4172))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_4172 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4172))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2022-12-13 15:38:01,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:01,149 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 [2022-12-13 15:38:01,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:01,155 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 [2022-12-13 15:38:01,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:01,191 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 116 treesize of output 148 [2022-12-13 15:38:01,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:01,208 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 68 treesize of output 84 [2022-12-13 15:38:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:01,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848388229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:01,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:01,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 15:38:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419980541] [2022-12-13 15:38:01,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 15:38:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 15:38:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=655, Unknown=1, NotChecked=52, Total=812 [2022-12-13 15:38:01,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 557 [2022-12-13 15:38:01,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 628 transitions, 32204 flow. Second operand has 29 states, 29 states have (on average 191.82758620689654) internal successors, (5563), 29 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:01,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:01,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 557 [2022-12-13 15:38:01,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:05,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:38:06,874 INFO L130 PetriNetUnfolder]: 1638/2951 cut-off events. [2022-12-13 15:38:06,874 INFO L131 PetriNetUnfolder]: For 482746/482746 co-relation queries the response was YES. [2022-12-13 15:38:06,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63767 conditions, 2951 events. 1638/2951 cut-off events. For 482746/482746 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 19266 event pairs, 97 based on Foata normal form. 8/2959 useless extension candidates. Maximal degree in co-relation 63560. Up to 1468 conditions per place. [2022-12-13 15:38:06,916 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 263 selfloop transitions, 427 changer transitions 6/696 dead transitions. [2022-12-13 15:38:06,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 696 transitions, 35914 flow [2022-12-13 15:38:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:38:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:38:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3134 transitions. [2022-12-13 15:38:06,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35166068222621183 [2022-12-13 15:38:06,919 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3134 transitions. [2022-12-13 15:38:06,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3134 transitions. [2022-12-13 15:38:06,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:06,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3134 transitions. [2022-12-13 15:38:06,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 195.875) internal successors, (3134), 16 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:06,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:06,924 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:06,924 INFO L175 Difference]: Start difference. First operand has 407 places, 628 transitions, 32204 flow. Second operand 16 states and 3134 transitions. [2022-12-13 15:38:06,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 696 transitions, 35914 flow [2022-12-13 15:38:08,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 696 transitions, 35327 flow, removed 102 selfloop flow, removed 13 redundant places. [2022-12-13 15:38:08,187 INFO L231 Difference]: Finished difference. Result has 413 places, 647 transitions, 34242 flow [2022-12-13 15:38:08,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=31657, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=34242, PETRI_PLACES=413, PETRI_TRANSITIONS=647} [2022-12-13 15:38:08,188 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 390 predicate places. [2022-12-13 15:38:08,188 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 647 transitions, 34242 flow [2022-12-13 15:38:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 191.82758620689654) internal successors, (5563), 29 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:08,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:08,189 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:08,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-13 15:38:08,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-13 15:38:08,390 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:08,390 INFO L85 PathProgramCache]: Analyzing trace with hash -598598654, now seen corresponding path program 55 times [2022-12-13 15:38:08,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:08,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401798247] [2022-12-13 15:38:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:08,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:09,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:09,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401798247] [2022-12-13 15:38:09,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401798247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:09,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045932019] [2022-12-13 15:38:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:38:09,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:09,049 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:09,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 15:38:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 15:38:09,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:38:09,390 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 [2022-12-13 15:38:09,521 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:38:09,521 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 60 treesize of output 32 [2022-12-13 15:38:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:09,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:09,750 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4243 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4243))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_4243 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4243))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2022-12-13 15:38:09,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:09,785 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 116 treesize of output 148 [2022-12-13 15:38:09,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:09,803 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 68 treesize of output 84 [2022-12-13 15:38:10,068 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:38:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:10,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045932019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:10,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:10,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-13 15:38:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203362847] [2022-12-13 15:38:10,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 15:38:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 15:38:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2022-12-13 15:38:10,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 557 [2022-12-13 15:38:10,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 647 transitions, 34242 flow. Second operand has 28 states, 28 states have (on average 191.89285714285714) internal successors, (5373), 28 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:10,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:10,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 557 [2022-12-13 15:38:10,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:13,103 INFO L130 PetriNetUnfolder]: 1907/3472 cut-off events. [2022-12-13 15:38:13,103 INFO L131 PetriNetUnfolder]: For 615342/615342 co-relation queries the response was YES. [2022-12-13 15:38:13,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77108 conditions, 3472 events. 1907/3472 cut-off events. For 615342/615342 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 23952 event pairs, 234 based on Foata normal form. 10/3482 useless extension candidates. Maximal degree in co-relation 76899. Up to 1279 conditions per place. [2022-12-13 15:38:13,197 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 303 selfloop transitions, 525 changer transitions 14/842 dead transitions. [2022-12-13 15:38:13,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 842 transitions, 45903 flow [2022-12-13 15:38:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:38:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:38:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2749 transitions. [2022-12-13 15:38:13,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35252628879199793 [2022-12-13 15:38:13,200 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2749 transitions. [2022-12-13 15:38:13,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2749 transitions. [2022-12-13 15:38:13,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:13,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2749 transitions. [2022-12-13 15:38:13,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 196.35714285714286) internal successors, (2749), 14 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:13,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:13,208 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:13,208 INFO L175 Difference]: Start difference. First operand has 413 places, 647 transitions, 34242 flow. Second operand 14 states and 2749 transitions. [2022-12-13 15:38:13,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 842 transitions, 45903 flow [2022-12-13 15:38:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 842 transitions, 45629 flow, removed 64 selfloop flow, removed 10 redundant places. [2022-12-13 15:38:15,090 INFO L231 Difference]: Finished difference. Result has 417 places, 748 transitions, 41824 flow [2022-12-13 15:38:15,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=33988, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=41824, PETRI_PLACES=417, PETRI_TRANSITIONS=748} [2022-12-13 15:38:15,090 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 394 predicate places. [2022-12-13 15:38:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 748 transitions, 41824 flow [2022-12-13 15:38:15,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 191.89285714285714) internal successors, (5373), 28 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:15,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:15,091 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:15,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-13 15:38:15,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:15,292 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash 883925580, now seen corresponding path program 56 times [2022-12-13 15:38:15,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:15,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189794895] [2022-12-13 15:38:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:15,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:15,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189794895] [2022-12-13 15:38:15,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189794895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110774066] [2022-12-13 15:38:15,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:38:15,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:15,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:15,989 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:15,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-13 15:38:16,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:38:16,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 15:38:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:38:16,348 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 [2022-12-13 15:38:16,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:16,409 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 35 [2022-12-13 15:38:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:16,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:16,916 WARN L837 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_4314 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4314))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset)))))) (forall ((v_ArrVal_4314 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4314))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse1 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))))) is different from false [2022-12-13 15:38:16,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:16,925 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 [2022-12-13 15:38:16,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:16,930 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 [2022-12-13 15:38:16,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:16,969 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 116 treesize of output 148 [2022-12-13 15:38:16,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:16,989 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 68 treesize of output 84 [2022-12-13 15:38:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:17,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110774066] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:17,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:17,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-12-13 15:38:17,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916744541] [2022-12-13 15:38:17,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:17,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 15:38:17,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 15:38:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=757, Unknown=1, NotChecked=56, Total=930 [2022-12-13 15:38:17,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 557 [2022-12-13 15:38:17,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 748 transitions, 41824 flow. Second operand has 31 states, 31 states have (on average 188.80645161290323) internal successors, (5853), 31 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:17,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:17,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 557 [2022-12-13 15:38:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:20,881 INFO L130 PetriNetUnfolder]: 1912/3466 cut-off events. [2022-12-13 15:38:20,882 INFO L131 PetriNetUnfolder]: For 613209/613209 co-relation queries the response was YES. [2022-12-13 15:38:20,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78698 conditions, 3466 events. 1912/3466 cut-off events. For 613209/613209 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 23670 event pairs, 83 based on Foata normal form. 24/3490 useless extension candidates. Maximal degree in co-relation 78488. Up to 1759 conditions per place. [2022-12-13 15:38:20,933 INFO L137 encePairwiseOnDemand]: 544/557 looper letters, 248 selfloop transitions, 551 changer transitions 3/802 dead transitions. [2022-12-13 15:38:20,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 802 transitions, 44652 flow [2022-12-13 15:38:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:38:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:38:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3851 transitions. [2022-12-13 15:38:20,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3456912028725314 [2022-12-13 15:38:20,936 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3851 transitions. [2022-12-13 15:38:20,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3851 transitions. [2022-12-13 15:38:20,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:20,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3851 transitions. [2022-12-13 15:38:20,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 192.55) internal successors, (3851), 20 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:20,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:20,942 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:20,942 INFO L175 Difference]: Start difference. First operand has 417 places, 748 transitions, 41824 flow. Second operand 20 states and 3851 transitions. [2022-12-13 15:38:20,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 802 transitions, 44652 flow [2022-12-13 15:38:22,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 802 transitions, 44402 flow, removed 23 selfloop flow, removed 8 redundant places. [2022-12-13 15:38:22,641 INFO L231 Difference]: Finished difference. Result has 429 places, 749 transitions, 42803 flow [2022-12-13 15:38:22,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=40675, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=42803, PETRI_PLACES=429, PETRI_TRANSITIONS=749} [2022-12-13 15:38:22,642 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 406 predicate places. [2022-12-13 15:38:22,642 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 749 transitions, 42803 flow [2022-12-13 15:38:22,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 188.80645161290323) internal successors, (5853), 31 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:22,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:22,643 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:22,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-13 15:38:22,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-13 15:38:22,844 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:22,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1088997488, now seen corresponding path program 57 times [2022-12-13 15:38:22,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:22,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813632264] [2022-12-13 15:38:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:22,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:38:23,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:23,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813632264] [2022-12-13 15:38:23,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813632264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:23,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942782] [2022-12-13 15:38:23,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:38:23,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:23,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:23,880 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:23,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-13 15:38:24,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:38:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 15:38:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:38:24,293 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 [2022-12-13 15:38:24,475 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:38:24,476 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 38 treesize of output 14 [2022-12-13 15:38:24,485 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:38:24,485 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 39 treesize of output 19 [2022-12-13 15:38:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:24,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:25,160 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4385 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4385))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_4385 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4385))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2022-12-13 15:38:25,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:25,195 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 116 treesize of output 148 [2022-12-13 15:38:25,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:25,214 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 68 treesize of output 84 [2022-12-13 15:38:25,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:38:25,468 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:38:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:25,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:25,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:25,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 37 [2022-12-13 15:38:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279747863] [2022-12-13 15:38:25,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:38:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:38:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1194, Unknown=1, NotChecked=70, Total=1406 [2022-12-13 15:38:25,768 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 557 [2022-12-13 15:38:25,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 749 transitions, 42803 flow. Second operand has 38 states, 38 states have (on average 164.6315789473684) internal successors, (6256), 38 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:25,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:25,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 557 [2022-12-13 15:38:25,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:30,535 INFO L130 PetriNetUnfolder]: 1957/3552 cut-off events. [2022-12-13 15:38:30,535 INFO L131 PetriNetUnfolder]: For 664479/664479 co-relation queries the response was YES. [2022-12-13 15:38:30,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82739 conditions, 3552 events. 1957/3552 cut-off events. For 664479/664479 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 24341 event pairs, 108 based on Foata normal form. 13/3565 useless extension candidates. Maximal degree in co-relation 82526. Up to 1754 conditions per place. [2022-12-13 15:38:30,636 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 277 selfloop transitions, 548 changer transitions 4/829 dead transitions. [2022-12-13 15:38:30,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 829 transitions, 47075 flow [2022-12-13 15:38:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:38:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:38:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4690 transitions. [2022-12-13 15:38:30,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3007181328545781 [2022-12-13 15:38:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4690 transitions. [2022-12-13 15:38:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4690 transitions. [2022-12-13 15:38:30,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:30,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4690 transitions. [2022-12-13 15:38:30,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 167.5) internal successors, (4690), 28 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:30,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 557.0) internal successors, (16153), 29 states have internal predecessors, (16153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:30,656 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 557.0) internal successors, (16153), 29 states have internal predecessors, (16153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:30,656 INFO L175 Difference]: Start difference. First operand has 429 places, 749 transitions, 42803 flow. Second operand 28 states and 4690 transitions. [2022-12-13 15:38:30,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 829 transitions, 47075 flow [2022-12-13 15:38:32,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 829 transitions, 46077 flow, removed 164 selfloop flow, removed 37 redundant places. [2022-12-13 15:38:32,372 INFO L231 Difference]: Finished difference. Result has 423 places, 768 transitions, 44491 flow [2022-12-13 15:38:32,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=41711, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=44491, PETRI_PLACES=423, PETRI_TRANSITIONS=768} [2022-12-13 15:38:32,372 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 400 predicate places. [2022-12-13 15:38:32,372 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 768 transitions, 44491 flow [2022-12-13 15:38:32,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 164.6315789473684) internal successors, (6256), 38 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:32,373 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:32,373 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:32,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-13 15:38:32,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-13 15:38:32,574 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash 722010010, now seen corresponding path program 58 times [2022-12-13 15:38:32,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072235921] [2022-12-13 15:38:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072235921] [2022-12-13 15:38:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072235921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908683023] [2022-12-13 15:38:33,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:38:33,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:33,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:33,135 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:33,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-13 15:38:33,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:38:33,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 15:38:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:38:33,476 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 [2022-12-13 15:38:33,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:33,553 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 35 [2022-12-13 15:38:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:33,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:33,845 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4456 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4456))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_4456 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4456))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2022-12-13 15:38:33,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:33,873 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 116 treesize of output 148 [2022-12-13 15:38:33,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:33,889 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 68 treesize of output 84 [2022-12-13 15:38:34,199 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:38:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:34,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908683023] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:34,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:34,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-13 15:38:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768312605] [2022-12-13 15:38:34,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:34,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 15:38:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 15:38:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=608, Unknown=1, NotChecked=50, Total=756 [2022-12-13 15:38:34,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 557 [2022-12-13 15:38:34,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 768 transitions, 44491 flow. Second operand has 28 states, 28 states have (on average 191.75) internal successors, (5369), 28 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:34,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:34,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 557 [2022-12-13 15:38:34,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:38,149 INFO L130 PetriNetUnfolder]: 2104/3806 cut-off events. [2022-12-13 15:38:38,149 INFO L131 PetriNetUnfolder]: For 746977/746977 co-relation queries the response was YES. [2022-12-13 15:38:38,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89658 conditions, 3806 events. 2104/3806 cut-off events. For 746977/746977 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 26476 event pairs, 206 based on Foata normal form. 10/3816 useless extension candidates. Maximal degree in co-relation 89463. Up to 1421 conditions per place. [2022-12-13 15:38:38,205 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 293 selfloop transitions, 610 changer transitions 7/910 dead transitions. [2022-12-13 15:38:38,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 910 transitions, 52123 flow [2022-12-13 15:38:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:38:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:38:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3715 transitions. [2022-12-13 15:38:38,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3510346782575829 [2022-12-13 15:38:38,207 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3715 transitions. [2022-12-13 15:38:38,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3715 transitions. [2022-12-13 15:38:38,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:38,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3715 transitions. [2022-12-13 15:38:38,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 195.52631578947367) internal successors, (3715), 19 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) [2022-12-13 15:38:38,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 557.0) internal successors, (11140), 20 states have internal predecessors, (11140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:38,214 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 557.0) internal successors, (11140), 20 states have internal predecessors, (11140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:38,214 INFO L175 Difference]: Start difference. First operand has 423 places, 768 transitions, 44491 flow. Second operand 19 states and 3715 transitions. [2022-12-13 15:38:38,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 910 transitions, 52123 flow [2022-12-13 15:38:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 910 transitions, 51411 flow, removed 193 selfloop flow, removed 18 redundant places. [2022-12-13 15:38:39,944 INFO L231 Difference]: Finished difference. Result has 423 places, 811 transitions, 48483 flow [2022-12-13 15:38:39,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=43801, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=48483, PETRI_PLACES=423, PETRI_TRANSITIONS=811} [2022-12-13 15:38:39,945 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 400 predicate places. [2022-12-13 15:38:39,945 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 811 transitions, 48483 flow [2022-12-13 15:38:39,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 191.75) internal successors, (5369), 28 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:39,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:39,945 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:39,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-13 15:38:40,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:40,146 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2056141382, now seen corresponding path program 59 times [2022-12-13 15:38:40,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:40,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879986077] [2022-12-13 15:38:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:40,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879986077] [2022-12-13 15:38:40,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879986077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:40,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569844534] [2022-12-13 15:38:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:38:40,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:40,711 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-13 15:38:40,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:38:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:38:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:40,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:40,981 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 65 treesize of output 41 [2022-12-13 15:38:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:41,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:41,224 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:38:41,224 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 [2022-12-13 15:38:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569844534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:41,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:41,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2022-12-13 15:38:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885681355] [2022-12-13 15:38:41,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:41,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:38:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:38:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:38:41,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:38:41,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 811 transitions, 48483 flow. Second operand has 21 states, 21 states have (on average 212.14285714285714) internal successors, (4455), 21 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:41,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:41,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:38:41,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:44,690 INFO L130 PetriNetUnfolder]: 2118/3834 cut-off events. [2022-12-13 15:38:44,690 INFO L131 PetriNetUnfolder]: For 770925/770925 co-relation queries the response was YES. [2022-12-13 15:38:44,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91192 conditions, 3834 events. 2118/3834 cut-off events. For 770925/770925 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 26555 event pairs, 581 based on Foata normal form. 8/3842 useless extension candidates. Maximal degree in co-relation 91003. Up to 3307 conditions per place. [2022-12-13 15:38:44,768 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 662 selfloop transitions, 186 changer transitions 0/848 dead transitions. [2022-12-13 15:38:44,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 848 transitions, 50969 flow [2022-12-13 15:38:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:38:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:38:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2802 transitions. [2022-12-13 15:38:44,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38696312663996685 [2022-12-13 15:38:44,772 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2802 transitions. [2022-12-13 15:38:44,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2802 transitions. [2022-12-13 15:38:44,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:44,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2802 transitions. [2022-12-13 15:38:44,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 215.53846153846155) internal successors, (2802), 13 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:44,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:44,779 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:44,780 INFO L175 Difference]: Start difference. First operand has 423 places, 811 transitions, 48483 flow. Second operand 13 states and 2802 transitions. [2022-12-13 15:38:44,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 848 transitions, 50969 flow [2022-12-13 15:38:46,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 848 transitions, 50331 flow, removed 44 selfloop flow, removed 11 redundant places. [2022-12-13 15:38:46,588 INFO L231 Difference]: Finished difference. Result has 423 places, 817 transitions, 48536 flow [2022-12-13 15:38:46,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=47864, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=48536, PETRI_PLACES=423, PETRI_TRANSITIONS=817} [2022-12-13 15:38:46,589 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 400 predicate places. [2022-12-13 15:38:46,589 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 817 transitions, 48536 flow [2022-12-13 15:38:46,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 212.14285714285714) internal successors, (4455), 21 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:46,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:46,590 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:46,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-13 15:38:46,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-13 15:38:46,791 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1692687844, now seen corresponding path program 60 times [2022-12-13 15:38:46,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:46,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433605658] [2022-12-13 15:38:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:46,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:47,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:47,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433605658] [2022-12-13 15:38:47,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433605658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:47,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451098443] [2022-12-13 15:38:47,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:38:47,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:47,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:47,316 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-13 15:38:47,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:38:47,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:38:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:47,684 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:38:47,684 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 36 treesize of output 12 [2022-12-13 15:38:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:47,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:47,862 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:38:47,862 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 [2022-12-13 15:38:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451098443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:47,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:47,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 21 [2022-12-13 15:38:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440172027] [2022-12-13 15:38:47,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:38:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:38:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:38:48,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:38:48,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 817 transitions, 48536 flow. Second operand has 21 states, 21 states have (on average 214.14285714285714) internal successors, (4497), 21 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:48,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:48,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:38:48,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:51,639 INFO L130 PetriNetUnfolder]: 2817/5099 cut-off events. [2022-12-13 15:38:51,639 INFO L131 PetriNetUnfolder]: For 887518/887518 co-relation queries the response was YES. [2022-12-13 15:38:51,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114217 conditions, 5099 events. 2817/5099 cut-off events. For 887518/887518 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 36463 event pairs, 225 based on Foata normal form. 70/5169 useless extension candidates. Maximal degree in co-relation 114025. Up to 1790 conditions per place. [2022-12-13 15:38:51,736 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 425 selfloop transitions, 633 changer transitions 3/1061 dead transitions. [2022-12-13 15:38:51,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1061 transitions, 61125 flow [2022-12-13 15:38:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:38:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:38:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3511 transitions. [2022-12-13 15:38:51,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39396319569120286 [2022-12-13 15:38:51,741 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3511 transitions. [2022-12-13 15:38:51,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3511 transitions. [2022-12-13 15:38:51,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:51,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3511 transitions. [2022-12-13 15:38:51,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 219.4375) internal successors, (3511), 16 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:51,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:51,750 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:51,750 INFO L175 Difference]: Start difference. First operand has 423 places, 817 transitions, 48536 flow. Second operand 16 states and 3511 transitions. [2022-12-13 15:38:51,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1061 transitions, 61125 flow [2022-12-13 15:38:54,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1061 transitions, 60705 flow, removed 44 selfloop flow, removed 6 redundant places. [2022-12-13 15:38:54,270 INFO L231 Difference]: Finished difference. Result has 441 places, 923 transitions, 56619 flow [2022-12-13 15:38:54,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=48108, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=56619, PETRI_PLACES=441, PETRI_TRANSITIONS=923} [2022-12-13 15:38:54,271 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 418 predicate places. [2022-12-13 15:38:54,271 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 923 transitions, 56619 flow [2022-12-13 15:38:54,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 214.14285714285714) internal successors, (4497), 21 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:54,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:54,272 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:54,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-13 15:38:54,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:54,472 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash -816790994, now seen corresponding path program 61 times [2022-12-13 15:38:54,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:54,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538862453] [2022-12-13 15:38:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:54,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:54,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538862453] [2022-12-13 15:38:54,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538862453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:54,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729950636] [2022-12-13 15:38:54,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:38:54,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:54,967 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:54,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-13 15:38:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:55,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:38:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:55,326 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:38:55,327 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 25 treesize of output 9 [2022-12-13 15:38:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:55,504 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:38:55,505 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 [2022-12-13 15:38:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:38:55,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729950636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:55,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:55,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:38:55,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824398261] [2022-12-13 15:38:55,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:55,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:38:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:38:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:38:56,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:38:56,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 923 transitions, 56619 flow. Second operand has 20 states, 20 states have (on average 214.3) internal successors, (4286), 20 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:56,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:56,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:38:56,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:38:59,788 INFO L130 PetriNetUnfolder]: 3061/5534 cut-off events. [2022-12-13 15:38:59,788 INFO L131 PetriNetUnfolder]: For 1037922/1037922 co-relation queries the response was YES. [2022-12-13 15:38:59,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127163 conditions, 5534 events. 3061/5534 cut-off events. For 1037922/1037922 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 40115 event pairs, 567 based on Foata normal form. 76/5610 useless extension candidates. Maximal degree in co-relation 126960. Up to 3098 conditions per place. [2022-12-13 15:38:59,870 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 629 selfloop transitions, 389 changer transitions 1/1019 dead transitions. [2022-12-13 15:38:59,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1019 transitions, 62566 flow [2022-12-13 15:38:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:38:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:38:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2844 transitions. [2022-12-13 15:38:59,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39276343046540535 [2022-12-13 15:38:59,873 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2844 transitions. [2022-12-13 15:38:59,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2844 transitions. [2022-12-13 15:38:59,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:59,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2844 transitions. [2022-12-13 15:38:59,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 218.76923076923077) internal successors, (2844), 13 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:59,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:59,878 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:59,878 INFO L175 Difference]: Start difference. First operand has 441 places, 923 transitions, 56619 flow. Second operand 13 states and 2844 transitions. [2022-12-13 15:38:59,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1019 transitions, 62566 flow [2022-12-13 15:39:02,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1019 transitions, 61952 flow, removed 167 selfloop flow, removed 4 redundant places. [2022-12-13 15:39:02,960 INFO L231 Difference]: Finished difference. Result has 453 places, 948 transitions, 58666 flow [2022-12-13 15:39:02,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=55859, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58666, PETRI_PLACES=453, PETRI_TRANSITIONS=948} [2022-12-13 15:39:02,960 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 430 predicate places. [2022-12-13 15:39:02,961 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 948 transitions, 58666 flow [2022-12-13 15:39:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 214.3) internal successors, (4286), 20 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:02,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:02,961 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:02,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-13 15:39:03,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-13 15:39:03,162 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1747266346, now seen corresponding path program 62 times [2022-12-13 15:39:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:03,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654048436] [2022-12-13 15:39:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:03,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:03,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654048436] [2022-12-13 15:39:03,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654048436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:03,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891330880] [2022-12-13 15:39:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:39:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:03,693 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:03,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-13 15:39:03,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:39:03,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:03,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 15:39:03,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:04,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:04,033 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 46 treesize of output 30 [2022-12-13 15:39:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:04,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:04,528 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:39:04,528 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 [2022-12-13 15:39:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:04,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891330880] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:04,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:04,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-12-13 15:39:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818250964] [2022-12-13 15:39:04,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:04,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:39:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:39:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:39:05,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 557 [2022-12-13 15:39:05,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 948 transitions, 58666 flow. Second operand has 26 states, 26 states have (on average 209.96153846153845) internal successors, (5459), 26 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:05,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:05,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 557 [2022-12-13 15:39:05,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:10,733 INFO L130 PetriNetUnfolder]: 3295/5956 cut-off events. [2022-12-13 15:39:10,733 INFO L131 PetriNetUnfolder]: For 1157863/1157863 co-relation queries the response was YES. [2022-12-13 15:39:10,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137944 conditions, 5956 events. 3295/5956 cut-off events. For 1157863/1157863 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 43395 event pairs, 398 based on Foata normal form. 52/6008 useless extension candidates. Maximal degree in co-relation 137735. Up to 3054 conditions per place. [2022-12-13 15:39:10,821 INFO L137 encePairwiseOnDemand]: 547/557 looper letters, 301 selfloop transitions, 763 changer transitions 0/1064 dead transitions. [2022-12-13 15:39:10,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1064 transitions, 65070 flow [2022-12-13 15:39:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:39:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 15:39:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5763 transitions. [2022-12-13 15:39:10,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3832036704568123 [2022-12-13 15:39:10,825 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5763 transitions. [2022-12-13 15:39:10,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5763 transitions. [2022-12-13 15:39:10,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:10,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5763 transitions. [2022-12-13 15:39:10,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 213.44444444444446) internal successors, (5763), 27 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:10,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 557.0) internal successors, (15596), 28 states have internal predecessors, (15596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:10,835 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 557.0) internal successors, (15596), 28 states have internal predecessors, (15596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:10,835 INFO L175 Difference]: Start difference. First operand has 453 places, 948 transitions, 58666 flow. Second operand 27 states and 5763 transitions. [2022-12-13 15:39:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1064 transitions, 65070 flow [2022-12-13 15:39:14,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1064 transitions, 64675 flow, removed 100 selfloop flow, removed 7 redundant places. [2022-12-13 15:39:14,421 INFO L231 Difference]: Finished difference. Result has 483 places, 996 transitions, 63737 flow [2022-12-13 15:39:14,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=58094, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=63737, PETRI_PLACES=483, PETRI_TRANSITIONS=996} [2022-12-13 15:39:14,422 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 460 predicate places. [2022-12-13 15:39:14,422 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 996 transitions, 63737 flow [2022-12-13 15:39:14,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 209.96153846153845) internal successors, (5459), 26 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:14,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:14,422 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:14,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-12-13 15:39:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:14,624 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1932471354, now seen corresponding path program 63 times [2022-12-13 15:39:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:14,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614260062] [2022-12-13 15:39:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:15,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:15,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614260062] [2022-12-13 15:39:15,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614260062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:15,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096672639] [2022-12-13 15:39:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:39:15,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:15,096 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:15,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-13 15:39:15,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:39:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:39:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:15,481 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:39:15,481 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 36 treesize of output 12 [2022-12-13 15:39:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:15,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:15,671 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:39:15,671 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 [2022-12-13 15:39:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096672639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:15,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:15,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 19 [2022-12-13 15:39:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111226918] [2022-12-13 15:39:15,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:39:15,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:39:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:39:16,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:39:16,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 996 transitions, 63737 flow. Second operand has 19 states, 19 states have (on average 214.26315789473685) internal successors, (4071), 19 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:16,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:16,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:39:16,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:20,384 INFO L130 PetriNetUnfolder]: 3293/5954 cut-off events. [2022-12-13 15:39:20,384 INFO L131 PetriNetUnfolder]: For 1291730/1291730 co-relation queries the response was YES. [2022-12-13 15:39:20,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144421 conditions, 5954 events. 3293/5954 cut-off events. For 1291730/1291730 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43515 event pairs, 1019 based on Foata normal form. 28/5982 useless extension candidates. Maximal degree in co-relation 144199. Up to 5407 conditions per place. [2022-12-13 15:39:20,499 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 860 selfloop transitions, 172 changer transitions 0/1032 dead transitions. [2022-12-13 15:39:20,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1032 transitions, 66979 flow [2022-12-13 15:39:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:39:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:39:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2179 transitions. [2022-12-13 15:39:20,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39120287253141833 [2022-12-13 15:39:20,501 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2179 transitions. [2022-12-13 15:39:20,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2179 transitions. [2022-12-13 15:39:20,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:20,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2179 transitions. [2022-12-13 15:39:20,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 217.9) internal successors, (2179), 10 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:20,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:20,505 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:20,505 INFO L175 Difference]: Start difference. First operand has 483 places, 996 transitions, 63737 flow. Second operand 10 states and 2179 transitions. [2022-12-13 15:39:20,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1032 transitions, 66979 flow [2022-12-13 15:39:25,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1032 transitions, 65726 flow, removed 300 selfloop flow, removed 11 redundant places. [2022-12-13 15:39:25,061 INFO L231 Difference]: Finished difference. Result has 483 places, 1002 transitions, 63106 flow [2022-12-13 15:39:25,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62419, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=63106, PETRI_PLACES=483, PETRI_TRANSITIONS=1002} [2022-12-13 15:39:25,061 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 460 predicate places. [2022-12-13 15:39:25,061 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1002 transitions, 63106 flow [2022-12-13 15:39:25,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 214.26315789473685) internal successors, (4071), 19 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:25,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:25,062 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:25,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-13 15:39:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-12-13 15:39:25,263 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1653566070, now seen corresponding path program 64 times [2022-12-13 15:39:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952007213] [2022-12-13 15:39:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:25,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:25,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:25,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952007213] [2022-12-13 15:39:25,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952007213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:25,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121551313] [2022-12-13 15:39:25,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:39:25,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:25,964 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:25,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-13 15:39:26,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:39:26,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:26,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:39:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:26,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:26,237 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 46 treesize of output 30 [2022-12-13 15:39:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:26,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:26,471 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:39:26,472 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 [2022-12-13 15:39:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:26,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121551313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:26,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:26,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:39:26,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058948619] [2022-12-13 15:39:26,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:26,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:39:26,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:39:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:39:27,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:39:27,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1002 transitions, 63106 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:27,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:27,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:39:27,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:31,590 INFO L130 PetriNetUnfolder]: 3318/6011 cut-off events. [2022-12-13 15:39:31,590 INFO L131 PetriNetUnfolder]: For 1285019/1285019 co-relation queries the response was YES. [2022-12-13 15:39:31,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144315 conditions, 6011 events. 3318/6011 cut-off events. For 1285019/1285019 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 44071 event pairs, 1006 based on Foata normal form. 6/6017 useless extension candidates. Maximal degree in co-relation 144093. Up to 5459 conditions per place. [2022-12-13 15:39:31,685 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 880 selfloop transitions, 172 changer transitions 2/1054 dead transitions. [2022-12-13 15:39:31,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 1054 transitions, 66147 flow [2022-12-13 15:39:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:39:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:39:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3892 transitions. [2022-12-13 15:39:31,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3881907041691602 [2022-12-13 15:39:31,688 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3892 transitions. [2022-12-13 15:39:31,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3892 transitions. [2022-12-13 15:39:31,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:31,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3892 transitions. [2022-12-13 15:39:31,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 216.22222222222223) internal successors, (3892), 18 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:31,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:31,694 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:31,694 INFO L175 Difference]: Start difference. First operand has 483 places, 1002 transitions, 63106 flow. Second operand 18 states and 3892 transitions. [2022-12-13 15:39:31,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 1054 transitions, 66147 flow [2022-12-13 15:39:36,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1054 transitions, 65700 flow, removed 58 selfloop flow, removed 8 redundant places. [2022-12-13 15:39:36,968 INFO L231 Difference]: Finished difference. Result has 499 places, 1011 transitions, 63557 flow [2022-12-13 15:39:36,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62423, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=63557, PETRI_PLACES=499, PETRI_TRANSITIONS=1011} [2022-12-13 15:39:36,969 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 476 predicate places. [2022-12-13 15:39:36,969 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1011 transitions, 63557 flow [2022-12-13 15:39:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:36,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:36,969 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:36,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-13 15:39:37,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:37,170 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1444904374, now seen corresponding path program 65 times [2022-12-13 15:39:37,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:37,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746434001] [2022-12-13 15:39:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:37,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:37,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746434001] [2022-12-13 15:39:37,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746434001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004271901] [2022-12-13 15:39:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:39:37,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:37,774 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:37,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-13 15:39:38,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:39:38,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:38,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:39:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:38,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:38,133 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 65 treesize of output 41 [2022-12-13 15:39:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:38,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:38,362 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:39:38,363 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 [2022-12-13 15:39:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004271901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:38,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:38,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:39:38,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062531458] [2022-12-13 15:39:38,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:39:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:39:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:39:39,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:39:39,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1011 transitions, 63557 flow. Second operand has 20 states, 20 states have (on average 214.15) internal successors, (4283), 20 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:39,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:39,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:39:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:43,453 INFO L130 PetriNetUnfolder]: 3306/5973 cut-off events. [2022-12-13 15:39:43,453 INFO L131 PetriNetUnfolder]: For 1295673/1295673 co-relation queries the response was YES. [2022-12-13 15:39:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143938 conditions, 5973 events. 3306/5973 cut-off events. For 1295673/1295673 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43697 event pairs, 1027 based on Foata normal form. 4/5977 useless extension candidates. Maximal degree in co-relation 143709. Up to 5496 conditions per place. [2022-12-13 15:39:43,549 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 841 selfloop transitions, 176 changer transitions 3/1020 dead transitions. [2022-12-13 15:39:43,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1020 transitions, 65399 flow [2022-12-13 15:39:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:39:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:39:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1957 transitions. [2022-12-13 15:39:43,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39038499900259327 [2022-12-13 15:39:43,551 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1957 transitions. [2022-12-13 15:39:43,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1957 transitions. [2022-12-13 15:39:43,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:43,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1957 transitions. [2022-12-13 15:39:43,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.44444444444446) internal successors, (1957), 9 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:43,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:43,575 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:43,576 INFO L175 Difference]: Start difference. First operand has 499 places, 1011 transitions, 63557 flow. Second operand 9 states and 1957 transitions. [2022-12-13 15:39:43,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1020 transitions, 65399 flow [2022-12-13 15:39:48,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1020 transitions, 64959 flow, removed 128 selfloop flow, removed 8 redundant places. [2022-12-13 15:39:48,571 INFO L231 Difference]: Finished difference. Result has 496 places, 1004 transitions, 63003 flow [2022-12-13 15:39:48,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62680, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=63003, PETRI_PLACES=496, PETRI_TRANSITIONS=1004} [2022-12-13 15:39:48,573 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 473 predicate places. [2022-12-13 15:39:48,573 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1004 transitions, 63003 flow [2022-12-13 15:39:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 214.15) internal successors, (4283), 20 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:48,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:48,574 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:48,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-13 15:39:48,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:48,775 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash -958485386, now seen corresponding path program 66 times [2022-12-13 15:39:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:48,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418547284] [2022-12-13 15:39:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:48,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:49,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418547284] [2022-12-13 15:39:49,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418547284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090164273] [2022-12-13 15:39:49,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:39:49,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:49,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:49,461 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:49,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-13 15:39:49,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:39:49,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:49,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:39:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:49,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:49,968 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:39:49,969 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 [2022-12-13 15:39:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:39:49,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090164273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:49,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:49,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:39:49,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800366159] [2022-12-13 15:39:49,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:49,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:39:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:39:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:39:50,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:39:50,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1004 transitions, 63003 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:50,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:50,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:39:50,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:54,667 INFO L130 PetriNetUnfolder]: 3299/5950 cut-off events. [2022-12-13 15:39:54,667 INFO L131 PetriNetUnfolder]: For 1290164/1290164 co-relation queries the response was YES. [2022-12-13 15:39:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143334 conditions, 5950 events. 3299/5950 cut-off events. For 1290164/1290164 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 43267 event pairs, 1042 based on Foata normal form. 2/5952 useless extension candidates. Maximal degree in co-relation 143105. Up to 5499 conditions per place. [2022-12-13 15:39:54,804 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 861 selfloop transitions, 151 changer transitions 5/1017 dead transitions. [2022-12-13 15:39:54,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 1017 transitions, 65188 flow [2022-12-13 15:39:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:39:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:39:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1945 transitions. [2022-12-13 15:39:54,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3879912228206663 [2022-12-13 15:39:54,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1945 transitions. [2022-12-13 15:39:54,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1945 transitions. [2022-12-13 15:39:54,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:54,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1945 transitions. [2022-12-13 15:39:54,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.11111111111111) internal successors, (1945), 9 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:54,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:54,812 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:54,812 INFO L175 Difference]: Start difference. First operand has 496 places, 1004 transitions, 63003 flow. Second operand 9 states and 1945 transitions. [2022-12-13 15:39:54,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 1017 transitions, 65188 flow [2022-12-13 15:39:59,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1017 transitions, 64832 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-12-13 15:39:59,816 INFO L231 Difference]: Finished difference. Result has 496 places, 1000 transitions, 62740 flow [2022-12-13 15:39:59,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62561, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=62740, PETRI_PLACES=496, PETRI_TRANSITIONS=1000} [2022-12-13 15:39:59,817 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 473 predicate places. [2022-12-13 15:39:59,817 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1000 transitions, 62740 flow [2022-12-13 15:39:59,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:59,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:59,818 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:59,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-12-13 15:40:00,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:00,019 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1942802878, now seen corresponding path program 67 times [2022-12-13 15:40:00,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403738734] [2022-12-13 15:40:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:00,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:00,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403738734] [2022-12-13 15:40:00,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403738734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198085096] [2022-12-13 15:40:00,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:40:00,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:00,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:00,639 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:00,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-13 15:40:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:00,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:40:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:00,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:00,923 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 46 treesize of output 30 [2022-12-13 15:40:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:01,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:01,188 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-13 15:40:01,189 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 [2022-12-13 15:40:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:01,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198085096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:01,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:01,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:40:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549654593] [2022-12-13 15:40:01,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:40:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:40:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:40:02,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:40:02,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1000 transitions, 62740 flow. Second operand has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:02,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:02,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:40:02,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:06,186 INFO L130 PetriNetUnfolder]: 3277/5893 cut-off events. [2022-12-13 15:40:06,186 INFO L131 PetriNetUnfolder]: For 1284827/1284827 co-relation queries the response was YES. [2022-12-13 15:40:06,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142593 conditions, 5893 events. 3277/5893 cut-off events. For 1284827/1284827 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 42709 event pairs, 991 based on Foata normal form. 16/5909 useless extension candidates. Maximal degree in co-relation 142388. Up to 5419 conditions per place. [2022-12-13 15:40:06,288 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 853 selfloop transitions, 159 changer transitions 0/1012 dead transitions. [2022-12-13 15:40:06,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1012 transitions, 64826 flow [2022-12-13 15:40:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:40:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:40:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2165 transitions. [2022-12-13 15:40:06,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388689407540395 [2022-12-13 15:40:06,290 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2165 transitions. [2022-12-13 15:40:06,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2165 transitions. [2022-12-13 15:40:06,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:06,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2165 transitions. [2022-12-13 15:40:06,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 216.5) internal successors, (2165), 10 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:06,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:06,294 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:06,294 INFO L175 Difference]: Start difference. First operand has 496 places, 1000 transitions, 62740 flow. Second operand 10 states and 2165 transitions. [2022-12-13 15:40:06,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1012 transitions, 64826 flow [2022-12-13 15:40:11,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1012 transitions, 64507 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-12-13 15:40:11,188 INFO L231 Difference]: Finished difference. Result has 486 places, 994 transitions, 62526 flow [2022-12-13 15:40:11,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62208, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=62526, PETRI_PLACES=486, PETRI_TRANSITIONS=994} [2022-12-13 15:40:11,189 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 463 predicate places. [2022-12-13 15:40:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 994 transitions, 62526 flow [2022-12-13 15:40:11,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:11,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:11,189 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:11,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-13 15:40:11,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:11,390 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1102213958, now seen corresponding path program 68 times [2022-12-13 15:40:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:11,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245276011] [2022-12-13 15:40:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:11,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:12,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245276011] [2022-12-13 15:40:12,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245276011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906330905] [2022-12-13 15:40:12,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:40:12,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:12,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:12,103 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:12,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-13 15:40:12,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:40:12,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:40:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:12,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:12,464 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 58 treesize of output 51 [2022-12-13 15:40:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:12,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:12,719 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:40:12,719 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 71 treesize of output 96 [2022-12-13 15:40:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:12,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906330905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:12,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:12,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 22 [2022-12-13 15:40:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169826398] [2022-12-13 15:40:12,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:40:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:12,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:40:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:40:13,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:40:13,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 994 transitions, 62526 flow. Second operand has 22 states, 22 states have (on average 212.0909090909091) internal successors, (4666), 22 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:13,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:13,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:40:13,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:17,704 INFO L130 PetriNetUnfolder]: 3317/5996 cut-off events. [2022-12-13 15:40:17,704 INFO L131 PetriNetUnfolder]: For 1297030/1297030 co-relation queries the response was YES. [2022-12-13 15:40:17,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144707 conditions, 5996 events. 3317/5996 cut-off events. For 1297030/1297030 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 43763 event pairs, 1005 based on Foata normal form. 29/6025 useless extension candidates. Maximal degree in co-relation 144481. Up to 5440 conditions per place. [2022-12-13 15:40:17,804 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 857 selfloop transitions, 163 changer transitions 0/1020 dead transitions. [2022-12-13 15:40:17,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1020 transitions, 65287 flow [2022-12-13 15:40:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:40:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:40:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2158 transitions. [2022-12-13 15:40:17,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3874326750448833 [2022-12-13 15:40:17,806 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2158 transitions. [2022-12-13 15:40:17,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2158 transitions. [2022-12-13 15:40:17,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:17,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2158 transitions. [2022-12-13 15:40:17,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 215.8) internal successors, (2158), 10 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,810 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,810 INFO L175 Difference]: Start difference. First operand has 486 places, 994 transitions, 62526 flow. Second operand 10 states and 2158 transitions. [2022-12-13 15:40:17,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1020 transitions, 65287 flow [2022-12-13 15:40:23,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1020 transitions, 64966 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 15:40:23,447 INFO L231 Difference]: Finished difference. Result has 486 places, 993 transitions, 62474 flow [2022-12-13 15:40:23,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62027, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=62474, PETRI_PLACES=486, PETRI_TRANSITIONS=993} [2022-12-13 15:40:23,448 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 463 predicate places. [2022-12-13 15:40:23,448 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 993 transitions, 62474 flow [2022-12-13 15:40:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 212.0909090909091) internal successors, (4666), 22 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:23,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:23,449 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:23,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-13 15:40:23,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:23,650 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1228247446, now seen corresponding path program 69 times [2022-12-13 15:40:23,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193545571] [2022-12-13 15:40:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:23,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:24,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193545571] [2022-12-13 15:40:24,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193545571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432803743] [2022-12-13 15:40:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:40:24,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:24,315 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:24,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-13 15:40:24,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:40:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:40:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:24,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:24,949 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 46 treesize of output 30 [2022-12-13 15:40:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:25,151 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:40:25,151 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 20 treesize of output 4 [2022-12-13 15:40:25,186 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:40:25,186 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 [2022-12-13 15:40:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:25,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432803743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:25,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:25,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:40:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973629005] [2022-12-13 15:40:25,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:40:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:40:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:40:25,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:40:25,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 993 transitions, 62474 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:25,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:25,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:40:25,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:30,980 INFO L130 PetriNetUnfolder]: 3362/6107 cut-off events. [2022-12-13 15:40:30,980 INFO L131 PetriNetUnfolder]: For 1328951/1328951 co-relation queries the response was YES. [2022-12-13 15:40:31,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147639 conditions, 6107 events. 3362/6107 cut-off events. For 1328951/1328951 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 44984 event pairs, 1009 based on Foata normal form. 8/6115 useless extension candidates. Maximal degree in co-relation 147412. Up to 5542 conditions per place. [2022-12-13 15:40:31,091 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 884 selfloop transitions, 169 changer transitions 1/1054 dead transitions. [2022-12-13 15:40:31,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1054 transitions, 66111 flow [2022-12-13 15:40:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:40:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:40:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4109 transitions. [2022-12-13 15:40:31,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3882641972975527 [2022-12-13 15:40:31,096 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4109 transitions. [2022-12-13 15:40:31,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4109 transitions. [2022-12-13 15:40:31,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:31,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4109 transitions. [2022-12-13 15:40:31,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 216.26315789473685) internal successors, (4109), 19 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:31,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 557.0) internal successors, (11140), 20 states have internal predecessors, (11140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:31,106 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 557.0) internal successors, (11140), 20 states have internal predecessors, (11140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:31,106 INFO L175 Difference]: Start difference. First operand has 486 places, 993 transitions, 62474 flow. Second operand 19 states and 4109 transitions. [2022-12-13 15:40:31,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1054 transitions, 66111 flow [2022-12-13 15:40:36,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1054 transitions, 65729 flow, removed 30 selfloop flow, removed 8 redundant places. [2022-12-13 15:40:36,585 INFO L231 Difference]: Finished difference. Result has 503 places, 1008 transitions, 63487 flow [2022-12-13 15:40:36,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62092, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=63487, PETRI_PLACES=503, PETRI_TRANSITIONS=1008} [2022-12-13 15:40:36,586 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 480 predicate places. [2022-12-13 15:40:36,587 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1008 transitions, 63487 flow [2022-12-13 15:40:36,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:36,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:36,587 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:36,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-13 15:40:36,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-12-13 15:40:36,788 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1774597262, now seen corresponding path program 70 times [2022-12-13 15:40:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731057735] [2022-12-13 15:40:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:37,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731057735] [2022-12-13 15:40:37,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731057735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399306391] [2022-12-13 15:40:37,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:40:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:37,360 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:37,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-13 15:40:37,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:40:37,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:37,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:40:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:37,689 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:40:37,690 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 36 treesize of output 12 [2022-12-13 15:40:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:37,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:37,838 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:40:37,838 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 [2022-12-13 15:40:37,877 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:40:37,877 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 [2022-12-13 15:40:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:37,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399306391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:37,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:37,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 19 [2022-12-13 15:40:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250178479] [2022-12-13 15:40:37,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:40:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:40:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:40:38,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 557 [2022-12-13 15:40:38,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1008 transitions, 63487 flow. Second operand has 19 states, 19 states have (on average 214.31578947368422) internal successors, (4072), 19 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:38,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:38,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 557 [2022-12-13 15:40:38,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:43,223 INFO L130 PetriNetUnfolder]: 3402/6179 cut-off events. [2022-12-13 15:40:43,223 INFO L131 PetriNetUnfolder]: For 1402289/1402289 co-relation queries the response was YES. [2022-12-13 15:40:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151039 conditions, 6179 events. 3402/6179 cut-off events. For 1402289/1402289 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 45642 event pairs, 1040 based on Foata normal form. 40/6219 useless extension candidates. Maximal degree in co-relation 150805. Up to 5615 conditions per place. [2022-12-13 15:40:43,336 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 885 selfloop transitions, 161 changer transitions 0/1046 dead transitions. [2022-12-13 15:40:43,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1046 transitions, 67229 flow [2022-12-13 15:40:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:40:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:40:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2176 transitions. [2022-12-13 15:40:43,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3906642728904847 [2022-12-13 15:40:43,338 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2176 transitions. [2022-12-13 15:40:43,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2176 transitions. [2022-12-13 15:40:43,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:43,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2176 transitions. [2022-12-13 15:40:43,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:43,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:43,342 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:43,342 INFO L175 Difference]: Start difference. First operand has 503 places, 1008 transitions, 63487 flow. Second operand 10 states and 2176 transitions. [2022-12-13 15:40:43,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1046 transitions, 67229 flow [2022-12-13 15:40:50,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1046 transitions, 66615 flow, removed 221 selfloop flow, removed 6 redundant places. [2022-12-13 15:40:50,160 INFO L231 Difference]: Finished difference. Result has 508 places, 1012 transitions, 63363 flow [2022-12-13 15:40:50,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62715, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=63363, PETRI_PLACES=508, PETRI_TRANSITIONS=1012} [2022-12-13 15:40:50,161 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 485 predicate places. [2022-12-13 15:40:50,161 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1012 transitions, 63363 flow [2022-12-13 15:40:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 214.31578947368422) internal successors, (4072), 19 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:50,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:50,162 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:50,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-13 15:40:50,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:50,363 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 589459382, now seen corresponding path program 71 times [2022-12-13 15:40:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:50,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683674179] [2022-12-13 15:40:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:50,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:50,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683674179] [2022-12-13 15:40:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683674179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810789356] [2022-12-13 15:40:50,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:40:50,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:50,977 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-13 15:40:51,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:40:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:40:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:51,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:51,342 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 46 treesize of output 30 [2022-12-13 15:40:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:51,596 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:40:51,597 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 [2022-12-13 15:40:51,636 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:40:51,636 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 [2022-12-13 15:40:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:40:51,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810789356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:51,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:40:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790086879] [2022-12-13 15:40:51,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:40:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:40:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:40:52,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:40:52,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1012 transitions, 63363 flow. Second operand has 20 states, 20 states have (on average 213.2) internal successors, (4264), 20 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:52,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:52,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:40:52,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:57,180 INFO L130 PetriNetUnfolder]: 3436/6270 cut-off events. [2022-12-13 15:40:57,180 INFO L131 PetriNetUnfolder]: For 1414229/1414229 co-relation queries the response was YES. [2022-12-13 15:40:57,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153364 conditions, 6270 events. 3436/6270 cut-off events. For 1414229/1414229 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 46564 event pairs, 1053 based on Foata normal form. 29/6299 useless extension candidates. Maximal degree in co-relation 153127. Up to 5721 conditions per place. [2022-12-13 15:40:57,291 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 875 selfloop transitions, 171 changer transitions 0/1046 dead transitions. [2022-12-13 15:40:57,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1046 transitions, 66641 flow [2022-12-13 15:40:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:40:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:40:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2813 transitions. [2022-12-13 15:40:57,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3884822538323436 [2022-12-13 15:40:57,294 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2813 transitions. [2022-12-13 15:40:57,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2813 transitions. [2022-12-13 15:40:57,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:57,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2813 transitions. [2022-12-13 15:40:57,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:57,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:57,301 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:57,301 INFO L175 Difference]: Start difference. First operand has 508 places, 1012 transitions, 63363 flow. Second operand 13 states and 2813 transitions. [2022-12-13 15:40:57,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1046 transitions, 66641 flow [2022-12-13 15:41:04,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1046 transitions, 66192 flow, removed 70 selfloop flow, removed 7 redundant places. [2022-12-13 15:41:04,322 INFO L231 Difference]: Finished difference. Result has 515 places, 1015 transitions, 63547 flow [2022-12-13 15:41:04,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62736, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=63547, PETRI_PLACES=515, PETRI_TRANSITIONS=1015} [2022-12-13 15:41:04,323 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 492 predicate places. [2022-12-13 15:41:04,323 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1015 transitions, 63547 flow [2022-12-13 15:41:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.2) internal successors, (4264), 20 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:04,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:04,323 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:04,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-13 15:41:04,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-13 15:41:04,524 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:04,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1923328130, now seen corresponding path program 72 times [2022-12-13 15:41:04,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:04,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047111372] [2022-12-13 15:41:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:04,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:05,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047111372] [2022-12-13 15:41:05,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047111372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165784541] [2022-12-13 15:41:05,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:41:05,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:05,358 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-13 15:41:05,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:41:05,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:05,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:41:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:05,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:05,818 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:41:05,818 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 [2022-12-13 15:41:05,853 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:41:05,853 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 [2022-12-13 15:41:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:05,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165784541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:05,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:05,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:41:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830690086] [2022-12-13 15:41:05,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:05,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:41:05,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:41:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:41:06,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:41:06,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1015 transitions, 63547 flow. Second operand has 20 states, 20 states have (on average 212.15) internal successors, (4243), 20 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:06,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:06,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:41:06,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:10,917 INFO L130 PetriNetUnfolder]: 3430/6252 cut-off events. [2022-12-13 15:41:10,917 INFO L131 PetriNetUnfolder]: For 1411431/1411431 co-relation queries the response was YES. [2022-12-13 15:41:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152989 conditions, 6252 events. 3430/6252 cut-off events. For 1411431/1411431 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 46335 event pairs, 1081 based on Foata normal form. 2/6254 useless extension candidates. Maximal degree in co-relation 152750. Up to 5804 conditions per place. [2022-12-13 15:41:11,021 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 873 selfloop transitions, 149 changer transitions 6/1028 dead transitions. [2022-12-13 15:41:11,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1028 transitions, 66047 flow [2022-12-13 15:41:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:41:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:41:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1933 transitions. [2022-12-13 15:41:11,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3855974466387393 [2022-12-13 15:41:11,023 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1933 transitions. [2022-12-13 15:41:11,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1933 transitions. [2022-12-13 15:41:11,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:11,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1933 transitions. [2022-12-13 15:41:11,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.77777777777777) internal successors, (1933), 9 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:11,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:11,026 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:11,026 INFO L175 Difference]: Start difference. First operand has 515 places, 1015 transitions, 63547 flow. Second operand 9 states and 1933 transitions. [2022-12-13 15:41:11,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1028 transitions, 66047 flow [2022-12-13 15:41:17,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1028 transitions, 65627 flow, removed 45 selfloop flow, removed 8 redundant places. [2022-12-13 15:41:17,293 INFO L231 Difference]: Finished difference. Result has 517 places, 1015 transitions, 63442 flow [2022-12-13 15:41:17,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=63133, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=866, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=63442, PETRI_PLACES=517, PETRI_TRANSITIONS=1015} [2022-12-13 15:41:17,294 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 494 predicate places. [2022-12-13 15:41:17,295 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 1015 transitions, 63442 flow [2022-12-13 15:41:17,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.15) internal successors, (4243), 20 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:17,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:17,295 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:17,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-12-13 15:41:17,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:17,496 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 529649098, now seen corresponding path program 73 times [2022-12-13 15:41:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467850971] [2022-12-13 15:41:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:18,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467850971] [2022-12-13 15:41:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467850971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700074805] [2022-12-13 15:41:18,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:41:18,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:18,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:18,166 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:18,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-13 15:41:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:41:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:18,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:18,475 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 46 treesize of output 30 [2022-12-13 15:41:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:18,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:18,712 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:41:18,712 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 [2022-12-13 15:41:18,748 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:41:18,748 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 [2022-12-13 15:41:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:18,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700074805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:18,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:18,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:41:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949723155] [2022-12-13 15:41:18,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:18,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:41:18,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:41:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:41:19,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:41:19,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 1015 transitions, 63442 flow. Second operand has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:19,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:19,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:41:19,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:24,352 INFO L130 PetriNetUnfolder]: 3402/6178 cut-off events. [2022-12-13 15:41:24,352 INFO L131 PetriNetUnfolder]: For 1405841/1405841 co-relation queries the response was YES. [2022-12-13 15:41:24,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151940 conditions, 6178 events. 3402/6178 cut-off events. For 1405841/1405841 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 45587 event pairs, 1038 based on Foata normal form. 18/6196 useless extension candidates. Maximal degree in co-relation 151725. Up to 5708 conditions per place. [2022-12-13 15:41:24,547 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 863 selfloop transitions, 157 changer transitions 0/1020 dead transitions. [2022-12-13 15:41:24,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1020 transitions, 65368 flow [2022-12-13 15:41:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:41:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:41:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2163 transitions. [2022-12-13 15:41:24,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38833034111310594 [2022-12-13 15:41:24,549 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2163 transitions. [2022-12-13 15:41:24,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2163 transitions. [2022-12-13 15:41:24,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:24,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2163 transitions. [2022-12-13 15:41:24,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 216.3) internal successors, (2163), 10 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:24,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:24,555 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:24,555 INFO L175 Difference]: Start difference. First operand has 517 places, 1015 transitions, 63442 flow. Second operand 10 states and 2163 transitions. [2022-12-13 15:41:24,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1020 transitions, 65368 flow [2022-12-13 15:41:31,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1020 transitions, 65038 flow, removed 16 selfloop flow, removed 9 redundant places. [2022-12-13 15:41:31,476 INFO L231 Difference]: Finished difference. Result has 509 places, 1007 transitions, 63123 flow [2022-12-13 15:41:31,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62809, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=63123, PETRI_PLACES=509, PETRI_TRANSITIONS=1007} [2022-12-13 15:41:31,477 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 486 predicate places. [2022-12-13 15:41:31,477 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1007 transitions, 63123 flow [2022-12-13 15:41:31,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.3) internal successors, (4266), 20 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:31,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:31,477 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:31,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-13 15:41:31,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:31,678 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash -538547764, now seen corresponding path program 74 times [2022-12-13 15:41:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:31,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26439507] [2022-12-13 15:41:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:32,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26439507] [2022-12-13 15:41:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26439507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792230286] [2022-12-13 15:41:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:41:32,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:32,246 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:32,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-13 15:41:32,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:41:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:41:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:32,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:32,696 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:41:32,696 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 71 treesize of output 96 [2022-12-13 15:41:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792230286] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:32,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:32,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:41:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190278010] [2022-12-13 15:41:32,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:41:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:41:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:41:33,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:41:33,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1007 transitions, 63123 flow. Second operand has 20 states, 20 states have (on average 213.2) internal successors, (4264), 20 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:33,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:33,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:41:33,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:38,185 INFO L130 PetriNetUnfolder]: 3392/6147 cut-off events. [2022-12-13 15:41:38,185 INFO L131 PetriNetUnfolder]: For 1407682/1407682 co-relation queries the response was YES. [2022-12-13 15:41:38,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151306 conditions, 6147 events. 3392/6147 cut-off events. For 1407682/1407682 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 45234 event pairs, 1040 based on Foata normal form. 3/6150 useless extension candidates. Maximal degree in co-relation 151068. Up to 5705 conditions per place. [2022-12-13 15:41:38,291 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 863 selfloop transitions, 156 changer transitions 7/1026 dead transitions. [2022-12-13 15:41:38,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1026 transitions, 65656 flow [2022-12-13 15:41:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:41:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:41:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1943 transitions. [2022-12-13 15:41:38,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3875922601236784 [2022-12-13 15:41:38,293 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1943 transitions. [2022-12-13 15:41:38,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1943 transitions. [2022-12-13 15:41:38,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:38,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1943 transitions. [2022-12-13 15:41:38,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 215.88888888888889) internal successors, (1943), 9 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:38,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:38,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:38,297 INFO L175 Difference]: Start difference. First operand has 509 places, 1007 transitions, 63123 flow. Second operand 9 states and 1943 transitions. [2022-12-13 15:41:38,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1026 transitions, 65656 flow [2022-12-13 15:41:45,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1026 transitions, 65345 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 15:41:45,274 INFO L231 Difference]: Finished difference. Result has 512 places, 1009 transitions, 63200 flow [2022-12-13 15:41:45,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62816, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=63200, PETRI_PLACES=512, PETRI_TRANSITIONS=1009} [2022-12-13 15:41:45,275 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 489 predicate places. [2022-12-13 15:41:45,275 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 1009 transitions, 63200 flow [2022-12-13 15:41:45,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.2) internal successors, (4264), 20 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:45,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:45,276 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:45,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-12-13 15:41:45,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:45,476 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:45,477 INFO L85 PathProgramCache]: Analyzing trace with hash 31750594, now seen corresponding path program 75 times [2022-12-13 15:41:45,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:45,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667704360] [2022-12-13 15:41:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667704360] [2022-12-13 15:41:46,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667704360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:46,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640060511] [2022-12-13 15:41:46,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:41:46,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:46,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:46,008 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:46,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-13 15:41:46,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:41:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:41:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:46,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:46,464 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 46 treesize of output 30 [2022-12-13 15:41:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:46,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:46,685 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:41:46,686 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 [2022-12-13 15:41:46,725 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:41:46,726 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 [2022-12-13 15:41:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640060511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:46,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:46,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2022-12-13 15:41:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438337550] [2022-12-13 15:41:46,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:46,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:41:46,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:41:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:41:47,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:41:47,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 1009 transitions, 63200 flow. Second operand has 21 states, 21 states have (on average 213.14285714285714) internal successors, (4476), 21 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:47,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:47,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:41:47,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:52,083 INFO L130 PetriNetUnfolder]: 3380/6090 cut-off events. [2022-12-13 15:41:52,083 INFO L131 PetriNetUnfolder]: For 1423350/1423350 co-relation queries the response was YES. [2022-12-13 15:41:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150712 conditions, 6090 events. 3380/6090 cut-off events. For 1423350/1423350 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 44367 event pairs, 566 based on Foata normal form. 3/6093 useless extension candidates. Maximal degree in co-relation 150471. Up to 3401 conditions per place. [2022-12-13 15:41:52,192 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 327 selfloop transitions, 724 changer transitions 4/1055 dead transitions. [2022-12-13 15:41:52,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 1055 transitions, 66722 flow [2022-12-13 15:41:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:41:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:41:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3881 transitions. [2022-12-13 15:41:52,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38709355675244367 [2022-12-13 15:41:52,195 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3881 transitions. [2022-12-13 15:41:52,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3881 transitions. [2022-12-13 15:41:52,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:52,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3881 transitions. [2022-12-13 15:41:52,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:52,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:52,202 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 557.0) internal successors, (10583), 19 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:52,202 INFO L175 Difference]: Start difference. First operand has 512 places, 1009 transitions, 63200 flow. Second operand 18 states and 3881 transitions. [2022-12-13 15:41:52,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 1055 transitions, 66722 flow [2022-12-13 15:41:58,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1055 transitions, 66356 flow, removed 31 selfloop flow, removed 9 redundant places. [2022-12-13 15:41:58,390 INFO L231 Difference]: Finished difference. Result has 516 places, 1020 transitions, 65085 flow [2022-12-13 15:41:58,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=62344, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=65085, PETRI_PLACES=516, PETRI_TRANSITIONS=1020} [2022-12-13 15:41:58,391 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 493 predicate places. [2022-12-13 15:41:58,391 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1020 transitions, 65085 flow [2022-12-13 15:41:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 213.14285714285714) internal successors, (4476), 21 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:58,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:58,392 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:58,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-12-13 15:41:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-12-13 15:41:58,593 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:58,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1940283646, now seen corresponding path program 76 times [2022-12-13 15:41:58,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:58,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690356860] [2022-12-13 15:41:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:58,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:59,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690356860] [2022-12-13 15:41:59,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690356860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662414603] [2022-12-13 15:41:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:41:59,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:59,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:59,184 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:59,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-12-13 15:41:59,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:41:59,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:41:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:59,686 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:41:59,686 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 71 treesize of output 96 [2022-12-13 15:41:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:41:59,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662414603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:59,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:59,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-13 15:41:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353467453] [2022-12-13 15:41:59,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:41:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:41:59,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:42:00,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:42:00,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1020 transitions, 65085 flow. Second operand has 21 states, 21 states have (on average 212.0952380952381) internal successors, (4454), 21 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:00,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:00,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:42:00,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:04,811 INFO L130 PetriNetUnfolder]: 3370/6055 cut-off events. [2022-12-13 15:42:04,811 INFO L131 PetriNetUnfolder]: For 1424373/1424373 co-relation queries the response was YES. [2022-12-13 15:42:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150776 conditions, 6055 events. 3370/6055 cut-off events. For 1424373/1424373 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 44062 event pairs, 1045 based on Foata normal form. 2/6057 useless extension candidates. Maximal degree in co-relation 150540. Up to 5619 conditions per place. [2022-12-13 15:42:04,912 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 873 selfloop transitions, 152 changer transitions 6/1031 dead transitions. [2022-12-13 15:42:04,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1031 transitions, 67316 flow [2022-12-13 15:42:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:42:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:42:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1935 transitions. [2022-12-13 15:42:04,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3859964093357271 [2022-12-13 15:42:04,914 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1935 transitions. [2022-12-13 15:42:04,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1935 transitions. [2022-12-13 15:42:04,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:04,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1935 transitions. [2022-12-13 15:42:04,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 215.0) internal successors, (1935), 9 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:04,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:04,918 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:04,918 INFO L175 Difference]: Start difference. First operand has 516 places, 1020 transitions, 65085 flow. Second operand 9 states and 1935 transitions. [2022-12-13 15:42:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1031 transitions, 67316 flow [2022-12-13 15:42:10,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1031 transitions, 66326 flow, removed 52 selfloop flow, removed 11 redundant places. [2022-12-13 15:42:10,923 INFO L231 Difference]: Finished difference. Result has 512 places, 1016 transitions, 64227 flow [2022-12-13 15:42:10,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=64095, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=64227, PETRI_PLACES=512, PETRI_TRANSITIONS=1016} [2022-12-13 15:42:10,923 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 489 predicate places. [2022-12-13 15:42:10,923 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 1016 transitions, 64227 flow [2022-12-13 15:42:10,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 212.0952380952381) internal successors, (4454), 21 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:10,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:42:10,924 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:10,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-12-13 15:42:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:11,125 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:42:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 297403434, now seen corresponding path program 77 times [2022-12-13 15:42:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993721745] [2022-12-13 15:42:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:11,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993721745] [2022-12-13 15:42:11,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993721745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28477728] [2022-12-13 15:42:11,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:42:11,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:11,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:11,725 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:11,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-12-13 15:42:12,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:42:12,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:42:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:12,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:12,097 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 46 treesize of output 30 [2022-12-13 15:42:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:12,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:12,259 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:42:12,259 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 [2022-12-13 15:42:12,285 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:42:12,285 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 [2022-12-13 15:42:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28477728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:12,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:12,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:42:12,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256605659] [2022-12-13 15:42:12,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:12,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:42:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:42:12,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:42:12,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:42:12,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 1016 transitions, 64227 flow. Second operand has 20 states, 20 states have (on average 213.1) internal successors, (4262), 20 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:12,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:12,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:42:12,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:16,678 INFO L130 PetriNetUnfolder]: 3363/6040 cut-off events. [2022-12-13 15:42:16,678 INFO L131 PetriNetUnfolder]: For 1393309/1393309 co-relation queries the response was YES. [2022-12-13 15:42:16,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148774 conditions, 6040 events. 3363/6040 cut-off events. For 1393309/1393309 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 43794 event pairs, 980 based on Foata normal form. 3/6043 useless extension candidates. Maximal degree in co-relation 148537. Up to 5572 conditions per place. [2022-12-13 15:42:16,781 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 915 selfloop transitions, 115 changer transitions 0/1030 dead transitions. [2022-12-13 15:42:16,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1030 transitions, 66675 flow [2022-12-13 15:42:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:42:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:42:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1945 transitions. [2022-12-13 15:42:16,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3879912228206663 [2022-12-13 15:42:16,784 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1945 transitions. [2022-12-13 15:42:16,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1945 transitions. [2022-12-13 15:42:16,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:16,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1945 transitions. [2022-12-13 15:42:16,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.11111111111111) internal successors, (1945), 9 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:16,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:16,787 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:16,787 INFO L175 Difference]: Start difference. First operand has 512 places, 1016 transitions, 64227 flow. Second operand 9 states and 1945 transitions. [2022-12-13 15:42:16,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1030 transitions, 66675 flow [2022-12-13 15:42:22,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1030 transitions, 66338 flow, removed 2 selfloop flow, removed 9 redundant places. [2022-12-13 15:42:22,701 INFO L231 Difference]: Finished difference. Result has 511 places, 1020 transitions, 64442 flow [2022-12-13 15:42:22,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=63890, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=64442, PETRI_PLACES=511, PETRI_TRANSITIONS=1020} [2022-12-13 15:42:22,702 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 488 predicate places. [2022-12-13 15:42:22,702 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1020 transitions, 64442 flow [2022-12-13 15:42:22,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.1) internal successors, (4262), 20 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:22,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:42:22,703 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:22,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-12-13 15:42:22,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:22,904 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:42:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1980772390, now seen corresponding path program 78 times [2022-12-13 15:42:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:22,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299325673] [2022-12-13 15:42:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:23,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:23,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299325673] [2022-12-13 15:42:23,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299325673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:23,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964672451] [2022-12-13 15:42:23,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:42:23,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:23,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:23,497 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:23,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-13 15:42:23,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:42:23,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:42:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:23,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:42:23,951 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 [2022-12-13 15:42:24,136 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:42:24,137 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 36 treesize of output 12 [2022-12-13 15:42:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:24,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:24,315 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5857 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5857))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (not (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))) is different from false [2022-12-13 15:42:24,360 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:42:24,360 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 [2022-12-13 15:42:24,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:24,379 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 [2022-12-13 15:42:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:24,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964672451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:24,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:24,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 29 [2022-12-13 15:42:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710672142] [2022-12-13 15:42:24,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:42:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:42:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=698, Unknown=1, NotChecked=54, Total=870 [2022-12-13 15:42:24,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 557 [2022-12-13 15:42:24,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1020 transitions, 64442 flow. Second operand has 30 states, 30 states have (on average 191.83333333333334) internal successors, (5755), 30 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:24,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:24,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 557 [2022-12-13 15:42:24,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:30,017 INFO L130 PetriNetUnfolder]: 3604/6468 cut-off events. [2022-12-13 15:42:30,017 INFO L131 PetriNetUnfolder]: For 1502166/1502166 co-relation queries the response was YES. [2022-12-13 15:42:30,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159529 conditions, 6468 events. 3604/6468 cut-off events. For 1502166/1502166 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47069 event pairs, 226 based on Foata normal form. 48/6516 useless extension candidates. Maximal degree in co-relation 159291. Up to 2092 conditions per place. [2022-12-13 15:42:30,129 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 552 selfloop transitions, 684 changer transitions 3/1239 dead transitions. [2022-12-13 15:42:30,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1239 transitions, 76826 flow [2022-12-13 15:42:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:42:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:42:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3934 transitions. [2022-12-13 15:42:30,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3531418312387792 [2022-12-13 15:42:30,132 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3934 transitions. [2022-12-13 15:42:30,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3934 transitions. [2022-12-13 15:42:30,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:30,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3934 transitions. [2022-12-13 15:42:30,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 196.7) internal successors, (3934), 20 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:30,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:30,139 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:30,139 INFO L175 Difference]: Start difference. First operand has 511 places, 1020 transitions, 64442 flow. Second operand 20 states and 3934 transitions. [2022-12-13 15:42:30,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1239 transitions, 76826 flow [2022-12-13 15:42:36,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1239 transitions, 76299 flow, removed 132 selfloop flow, removed 6 redundant places. [2022-12-13 15:42:36,485 INFO L231 Difference]: Finished difference. Result has 531 places, 1068 transitions, 68782 flow [2022-12-13 15:42:36,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=63981, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=68782, PETRI_PLACES=531, PETRI_TRANSITIONS=1068} [2022-12-13 15:42:36,486 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 508 predicate places. [2022-12-13 15:42:36,486 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1068 transitions, 68782 flow [2022-12-13 15:42:36,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 191.83333333333334) internal successors, (5755), 30 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:36,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:42:36,487 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:36,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-12-13 15:42:36,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-12-13 15:42:36,688 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:42:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1937223044, now seen corresponding path program 79 times [2022-12-13 15:42:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:36,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90875952] [2022-12-13 15:42:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:37,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:37,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90875952] [2022-12-13 15:42:37,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90875952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:37,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707483172] [2022-12-13 15:42:37,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:42:37,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:37,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:37,276 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:37,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-13 15:42:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:37,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 15:42:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:42:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:42:37,781 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:42:37,781 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 [2022-12-13 15:42:37,823 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:42:37,824 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 25 treesize of output 9 [2022-12-13 15:42:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:38,044 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:42:38,044 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 86 treesize of output 111 [2022-12-13 15:42:38,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:38,055 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 50 treesize of output 50 [2022-12-13 15:42:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:38,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707483172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:38,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:38,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-12-13 15:42:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165910049] [2022-12-13 15:42:38,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 15:42:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 15:42:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=694, Unknown=3, NotChecked=0, Total=812 [2022-12-13 15:42:39,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 557 [2022-12-13 15:42:39,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1068 transitions, 68782 flow. Second operand has 29 states, 29 states have (on average 187.82758620689654) internal successors, (5447), 29 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:39,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:39,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 557 [2022-12-13 15:42:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:44,240 INFO L130 PetriNetUnfolder]: 3617/6491 cut-off events. [2022-12-13 15:42:44,240 INFO L131 PetriNetUnfolder]: For 1590912/1590912 co-relation queries the response was YES. [2022-12-13 15:42:44,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163646 conditions, 6491 events. 3617/6491 cut-off events. For 1590912/1590912 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 47370 event pairs, 239 based on Foata normal form. 18/6509 useless extension candidates. Maximal degree in co-relation 163399. Up to 3583 conditions per place. [2022-12-13 15:42:44,368 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 552 selfloop transitions, 576 changer transitions 3/1131 dead transitions. [2022-12-13 15:42:44,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1131 transitions, 73731 flow [2022-12-13 15:42:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:42:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:42:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2681 transitions. [2022-12-13 15:42:44,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34380610412926393 [2022-12-13 15:42:44,371 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2681 transitions. [2022-12-13 15:42:44,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2681 transitions. [2022-12-13 15:42:44,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:44,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2681 transitions. [2022-12-13 15:42:44,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 191.5) internal successors, (2681), 14 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:44,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:44,376 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:44,376 INFO L175 Difference]: Start difference. First operand has 531 places, 1068 transitions, 68782 flow. Second operand 14 states and 2681 transitions. [2022-12-13 15:42:44,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1131 transitions, 73731 flow [2022-12-13 15:42:51,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1131 transitions, 72662 flow, removed 198 selfloop flow, removed 10 redundant places. [2022-12-13 15:42:52,038 INFO L231 Difference]: Finished difference. Result has 537 places, 1071 transitions, 69147 flow [2022-12-13 15:42:52,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=67600, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=69147, PETRI_PLACES=537, PETRI_TRANSITIONS=1071} [2022-12-13 15:42:52,039 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 514 predicate places. [2022-12-13 15:42:52,039 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1071 transitions, 69147 flow [2022-12-13 15:42:52,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 187.82758620689654) internal successors, (5447), 29 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:52,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:42:52,039 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:52,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-12-13 15:42:52,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-12-13 15:42:52,241 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:42:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash -809729450, now seen corresponding path program 80 times [2022-12-13 15:42:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:52,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004641148] [2022-12-13 15:42:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:52,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004641148] [2022-12-13 15:42:52,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004641148] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887322495] [2022-12-13 15:42:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:42:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:52,863 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:52,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-12-13 15:42:53,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:42:53,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 15:42:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:53,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:42:53,166 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 [2022-12-13 15:42:53,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:53,261 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 46 treesize of output 30 [2022-12-13 15:42:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:53,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:53,494 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5999 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5999))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset)))))) is different from false [2022-12-13 15:42:53,532 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:42:53,532 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 [2022-12-13 15:42:53,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:53,550 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 [2022-12-13 15:42:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:42:53,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887322495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:53,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:53,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-12-13 15:42:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108343325] [2022-12-13 15:42:53,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:53,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:42:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:42:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=706, Unknown=1, NotChecked=54, Total=870 [2022-12-13 15:42:53,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 557 [2022-12-13 15:42:53,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1071 transitions, 69147 flow. Second operand has 30 states, 30 states have (on average 191.8) internal successors, (5754), 30 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:53,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:53,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 557 [2022-12-13 15:42:53,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:59,221 INFO L130 PetriNetUnfolder]: 3665/6577 cut-off events. [2022-12-13 15:42:59,221 INFO L131 PetriNetUnfolder]: For 1664932/1664932 co-relation queries the response was YES. [2022-12-13 15:42:59,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166422 conditions, 6577 events. 3665/6577 cut-off events. For 1664932/1664932 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 48084 event pairs, 334 based on Foata normal form. 18/6595 useless extension candidates. Maximal degree in co-relation 166174. Up to 3986 conditions per place. [2022-12-13 15:42:59,337 INFO L137 encePairwiseOnDemand]: 545/557 looper letters, 676 selfloop transitions, 448 changer transitions 0/1124 dead transitions. [2022-12-13 15:42:59,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1124 transitions, 73595 flow [2022-12-13 15:42:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:42:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:42:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3136 transitions. [2022-12-13 15:42:59,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3518850987432675 [2022-12-13 15:42:59,340 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3136 transitions. [2022-12-13 15:42:59,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3136 transitions. [2022-12-13 15:42:59,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:59,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3136 transitions. [2022-12-13 15:42:59,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 196.0) internal successors, (3136), 16 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:59,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:59,346 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 557.0) internal successors, (9469), 17 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:59,346 INFO L175 Difference]: Start difference. First operand has 537 places, 1071 transitions, 69147 flow. Second operand 16 states and 3136 transitions. [2022-12-13 15:42:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1124 transitions, 73595 flow [2022-12-13 15:43:07,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1124 transitions, 73217 flow, removed 108 selfloop flow, removed 6 redundant places. [2022-12-13 15:43:07,108 INFO L231 Difference]: Finished difference. Result has 549 places, 1077 transitions, 70267 flow [2022-12-13 15:43:07,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=68693, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=70267, PETRI_PLACES=549, PETRI_TRANSITIONS=1077} [2022-12-13 15:43:07,108 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 526 predicate places. [2022-12-13 15:43:07,108 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 1077 transitions, 70267 flow [2022-12-13 15:43:07,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 191.8) internal successors, (5754), 30 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:07,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:43:07,109 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:43:07,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-12-13 15:43:07,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-12-13 15:43:07,310 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:43:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:43:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1702152654, now seen corresponding path program 81 times [2022-12-13 15:43:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:43:07,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158988425] [2022-12-13 15:43:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:43:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:43:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:43:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:07,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:43:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158988425] [2022-12-13 15:43:07,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158988425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:43:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260881983] [2022-12-13 15:43:07,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:43:07,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:43:07,994 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:43:07,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-12-13 15:43:08,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:43:08,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:43:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:43:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:43:08,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:43:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:43:08,505 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:43:08,505 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 39 treesize of output 40 [2022-12-13 15:43:08,678 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:43:08,678 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 36 treesize of output 12 [2022-12-13 15:43:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:08,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:43:08,931 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:43:08,932 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 86 treesize of output 111 [2022-12-13 15:43:08,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:08,944 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 50 treesize of output 50 [2022-12-13 15:43:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:09,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260881983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:43:09,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:43:09,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 15:43:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053813115] [2022-12-13 15:43:09,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:43:09,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:43:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:43:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:43:09,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=752, Unknown=1, NotChecked=0, Total=870 [2022-12-13 15:43:10,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 557 [2022-12-13 15:43:10,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1077 transitions, 70267 flow. Second operand has 30 states, 30 states have (on average 187.8) internal successors, (5634), 30 states have internal predecessors, (5634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:10,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:43:10,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 557 [2022-12-13 15:43:10,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:43:16,632 INFO L130 PetriNetUnfolder]: 3926/7042 cut-off events. [2022-12-13 15:43:16,632 INFO L131 PetriNetUnfolder]: For 1792413/1792413 co-relation queries the response was YES. [2022-12-13 15:43:16,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178237 conditions, 7042 events. 3926/7042 cut-off events. For 1792413/1792413 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 52037 event pairs, 218 based on Foata normal form. 54/7096 useless extension candidates. Maximal degree in co-relation 177986. Up to 2635 conditions per place. [2022-12-13 15:43:16,757 INFO L137 encePairwiseOnDemand]: 548/557 looper letters, 361 selfloop transitions, 830 changer transitions 3/1194 dead transitions. [2022-12-13 15:43:16,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 1194 transitions, 77885 flow [2022-12-13 15:43:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:43:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:43:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3831 transitions. [2022-12-13 15:43:16,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3438958707360862 [2022-12-13 15:43:16,760 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3831 transitions. [2022-12-13 15:43:16,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3831 transitions. [2022-12-13 15:43:16,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:43:16,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3831 transitions. [2022-12-13 15:43:16,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 191.55) internal successors, (3831), 20 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:16,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:16,767 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 557.0) internal successors, (11697), 21 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:16,767 INFO L175 Difference]: Start difference. First operand has 549 places, 1077 transitions, 70267 flow. Second operand 20 states and 3831 transitions. [2022-12-13 15:43:16,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 1194 transitions, 77885 flow [2022-12-13 15:43:25,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1194 transitions, 77020 flow, removed 119 selfloop flow, removed 15 redundant places. [2022-12-13 15:43:25,416 INFO L231 Difference]: Finished difference. Result has 559 places, 1134 transitions, 75814 flow [2022-12-13 15:43:25,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=69286, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=779, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=75814, PETRI_PLACES=559, PETRI_TRANSITIONS=1134} [2022-12-13 15:43:25,417 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 536 predicate places. [2022-12-13 15:43:25,417 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1134 transitions, 75814 flow [2022-12-13 15:43:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 187.8) internal successors, (5634), 30 states have internal predecessors, (5634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:25,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:43:25,417 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:43:25,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-12-13 15:43:25,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-12-13 15:43:25,618 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:43:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:43:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1349766288, now seen corresponding path program 82 times [2022-12-13 15:43:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:43:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314517187] [2022-12-13 15:43:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:43:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:43:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:43:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:26,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:43:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314517187] [2022-12-13 15:43:26,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314517187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:43:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844134424] [2022-12-13 15:43:26,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:43:26,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:43:26,224 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:43:26,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-12-13 15:43:26,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:43:26,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:43:26,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:43:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:43:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:43:26,562 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 [2022-12-13 15:43:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:26,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:43:26,896 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6141 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6141))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2022-12-13 15:43:26,939 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:43:26,939 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 [2022-12-13 15:43:26,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:26,955 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 [2022-12-13 15:43:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:27,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844134424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:43:27,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:43:27,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 15:43:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731476313] [2022-12-13 15:43:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:43:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 15:43:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:43:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 15:43:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=658, Unknown=1, NotChecked=52, Total=812 [2022-12-13 15:43:27,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 557 [2022-12-13 15:43:27,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1134 transitions, 75814 flow. Second operand has 29 states, 29 states have (on average 191.79310344827587) internal successors, (5562), 29 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:27,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:43:27,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 557 [2022-12-13 15:43:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:43:33,117 INFO L130 PetriNetUnfolder]: 3929/7048 cut-off events. [2022-12-13 15:43:33,117 INFO L131 PetriNetUnfolder]: For 1806460/1806460 co-relation queries the response was YES. [2022-12-13 15:43:33,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181006 conditions, 7048 events. 3929/7048 cut-off events. For 1806460/1806460 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 51964 event pairs, 559 based on Foata normal form. 2/7050 useless extension candidates. Maximal degree in co-relation 180754. Up to 6573 conditions per place. [2022-12-13 15:43:33,243 INFO L137 encePairwiseOnDemand]: 546/557 looper letters, 986 selfloop transitions, 196 changer transitions 7/1189 dead transitions. [2022-12-13 15:43:33,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1189 transitions, 81042 flow [2022-12-13 15:43:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:43:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:43:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2532 transitions. [2022-12-13 15:43:33,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3496754591907195 [2022-12-13 15:43:33,246 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2532 transitions. [2022-12-13 15:43:33,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2532 transitions. [2022-12-13 15:43:33,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:43:33,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2532 transitions. [2022-12-13 15:43:33,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 194.76923076923077) internal successors, (2532), 13 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:33,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:33,250 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:33,250 INFO L175 Difference]: Start difference. First operand has 559 places, 1134 transitions, 75814 flow. Second operand 13 states and 2532 transitions. [2022-12-13 15:43:33,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1189 transitions, 81042 flow [2022-12-13 15:43:42,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1189 transitions, 79828 flow, removed 199 selfloop flow, removed 14 redundant places. [2022-12-13 15:43:42,170 INFO L231 Difference]: Finished difference. Result has 559 places, 1169 transitions, 77277 flow [2022-12-13 15:43:42,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=74660, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=77277, PETRI_PLACES=559, PETRI_TRANSITIONS=1169} [2022-12-13 15:43:42,171 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 536 predicate places. [2022-12-13 15:43:42,171 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1169 transitions, 77277 flow [2022-12-13 15:43:42,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 191.79310344827587) internal successors, (5562), 29 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:42,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:43:42,171 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:43:42,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-12-13 15:43:42,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:42,372 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:43:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:43:42,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1033531242, now seen corresponding path program 83 times [2022-12-13 15:43:42,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:43:42,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336956667] [2022-12-13 15:43:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:43:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:43:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:43:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:43:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336956667] [2022-12-13 15:43:43,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336956667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:43:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784380261] [2022-12-13 15:43:43,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:43:43,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:43,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:43:43,049 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:43:43,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-12-13 15:43:43,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:43:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:43:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:43:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:43:43,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:43,495 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 68 treesize of output 60 [2022-12-13 15:43:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:43,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:43:43,653 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:43:43,653 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 71 treesize of output 96 [2022-12-13 15:43:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:43,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784380261] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:43:43,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:43:43,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-13 15:43:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627842140] [2022-12-13 15:43:43,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:43:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:43:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:43:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:43:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:43:44,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:43:44,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1169 transitions, 77277 flow. Second operand has 20 states, 20 states have (on average 212.1) internal successors, (4242), 20 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:44,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:43:44,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:43:44,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:43:49,955 INFO L130 PetriNetUnfolder]: 3923/7036 cut-off events. [2022-12-13 15:43:49,955 INFO L131 PetriNetUnfolder]: For 1808710/1808710 co-relation queries the response was YES. [2022-12-13 15:43:50,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178809 conditions, 7036 events. 3923/7036 cut-off events. For 1808710/1808710 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 52106 event pairs, 1126 based on Foata normal form. 3/7039 useless extension candidates. Maximal degree in co-relation 178557. Up to 6441 conditions per place. [2022-12-13 15:43:50,110 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 1039 selfloop transitions, 137 changer transitions 6/1182 dead transitions. [2022-12-13 15:43:50,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1182 transitions, 79686 flow [2022-12-13 15:43:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:43:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:43:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1934 transitions. [2022-12-13 15:43:50,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3857969279872332 [2022-12-13 15:43:50,113 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1934 transitions. [2022-12-13 15:43:50,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1934 transitions. [2022-12-13 15:43:50,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:43:50,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1934 transitions. [2022-12-13 15:43:50,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.88888888888889) internal successors, (1934), 9 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:50,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:50,116 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:50,116 INFO L175 Difference]: Start difference. First operand has 559 places, 1169 transitions, 77277 flow. Second operand 9 states and 1934 transitions. [2022-12-13 15:43:50,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1182 transitions, 79686 flow [2022-12-13 15:43:58,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1182 transitions, 79267 flow, removed 101 selfloop flow, removed 7 redundant places. [2022-12-13 15:43:58,514 INFO L231 Difference]: Finished difference. Result has 558 places, 1165 transitions, 76867 flow [2022-12-13 15:43:58,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=76765, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=76867, PETRI_PLACES=558, PETRI_TRANSITIONS=1165} [2022-12-13 15:43:58,515 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 535 predicate places. [2022-12-13 15:43:58,515 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1165 transitions, 76867 flow [2022-12-13 15:43:58,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 212.1) internal successors, (4242), 20 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:58,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:43:58,516 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:43:58,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-12-13 15:43:58,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:58,716 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:43:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:43:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 246149012, now seen corresponding path program 84 times [2022-12-13 15:43:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:43:58,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214495906] [2022-12-13 15:43:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:43:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:43:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:43:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:43:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214495906] [2022-12-13 15:43:59,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214495906] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:43:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659727613] [2022-12-13 15:43:59,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:43:59,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:43:59,374 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:43:59,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-12-13 15:43:59,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:43:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:43:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:43:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:43:59,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:59,824 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 68 treesize of output 60 [2022-12-13 15:43:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:43:59,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:00,033 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-13 15:44:00,033 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 63 treesize of output 69 [2022-12-13 15:44:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:00,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659727613] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:00,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:00,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2022-12-13 15:44:00,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855836560] [2022-12-13 15:44:00,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:00,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:44:00,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:00,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:44:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:44:00,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 557 [2022-12-13 15:44:01,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1165 transitions, 76867 flow. Second operand has 21 states, 21 states have (on average 212.0952380952381) internal successors, (4454), 21 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:01,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:44:01,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 557 [2022-12-13 15:44:01,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:44:06,951 INFO L130 PetriNetUnfolder]: 3922/7037 cut-off events. [2022-12-13 15:44:06,951 INFO L131 PetriNetUnfolder]: For 1773944/1773944 co-relation queries the response was YES. [2022-12-13 15:44:07,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176969 conditions, 7037 events. 3922/7037 cut-off events. For 1773944/1773944 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 52047 event pairs, 426 based on Foata normal form. 3/7040 useless extension candidates. Maximal degree in co-relation 176720. Up to 2697 conditions per place. [2022-12-13 15:44:07,081 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 146 selfloop transitions, 1052 changer transitions 9/1207 dead transitions. [2022-12-13 15:44:07,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1207 transitions, 80272 flow [2022-12-13 15:44:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:44:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:44:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3006 transitions. [2022-12-13 15:44:07,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38548345729674277 [2022-12-13 15:44:07,084 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3006 transitions. [2022-12-13 15:44:07,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3006 transitions. [2022-12-13 15:44:07,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:44:07,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3006 transitions. [2022-12-13 15:44:07,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 214.71428571428572) internal successors, (3006), 14 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:07,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:07,089 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 557.0) internal successors, (8355), 15 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:07,089 INFO L175 Difference]: Start difference. First operand has 558 places, 1165 transitions, 76867 flow. Second operand 14 states and 3006 transitions. [2022-12-13 15:44:07,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1207 transitions, 80272 flow [2022-12-13 15:44:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1207 transitions, 79990 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-12-13 15:44:15,596 INFO L231 Difference]: Finished difference. Result has 564 places, 1167 transitions, 78737 flow [2022-12-13 15:44:15,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=76587, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=78737, PETRI_PLACES=564, PETRI_TRANSITIONS=1167} [2022-12-13 15:44:15,597 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 541 predicate places. [2022-12-13 15:44:15,597 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 1167 transitions, 78737 flow [2022-12-13 15:44:15,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 212.0952380952381) internal successors, (4454), 21 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:15,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:44:15,598 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:15,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-12-13 15:44:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:15,798 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:44:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1436942866, now seen corresponding path program 85 times [2022-12-13 15:44:15,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:15,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253470468] [2022-12-13 15:44:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:15,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:16,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:16,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253470468] [2022-12-13 15:44:16,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253470468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:16,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418141512] [2022-12-13 15:44:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:44:16,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:16,362 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:16,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-12-13 15:44:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 15:44:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:16,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:44:16,725 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 46 treesize of output 30 [2022-12-13 15:44:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:16,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:17,244 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-13 15:44:17,244 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 71 treesize of output 96 [2022-12-13 15:44:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:17,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418141512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:17,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:17,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-12-13 15:44:17,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965956827] [2022-12-13 15:44:17,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:17,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:44:17,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:44:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:44:18,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 557 [2022-12-13 15:44:18,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1167 transitions, 78737 flow. Second operand has 26 states, 26 states have (on average 209.92307692307693) internal successors, (5458), 26 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:18,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:44:18,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 557 [2022-12-13 15:44:18,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:44:24,625 INFO L130 PetriNetUnfolder]: 3984/7172 cut-off events. [2022-12-13 15:44:24,625 INFO L131 PetriNetUnfolder]: For 1883217/1883217 co-relation queries the response was YES. [2022-12-13 15:44:24,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184224 conditions, 7172 events. 3984/7172 cut-off events. For 1883217/1883217 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 53560 event pairs, 713 based on Foata normal form. 29/7201 useless extension candidates. Maximal degree in co-relation 183974. Up to 5243 conditions per place. [2022-12-13 15:44:24,765 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 451 selfloop transitions, 767 changer transitions 0/1218 dead transitions. [2022-12-13 15:44:24,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1218 transitions, 82980 flow [2022-12-13 15:44:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:44:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 15:44:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3629 transitions. [2022-12-13 15:44:24,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38325060724469323 [2022-12-13 15:44:24,768 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3629 transitions. [2022-12-13 15:44:24,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3629 transitions. [2022-12-13 15:44:24,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:44:24,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3629 transitions. [2022-12-13 15:44:24,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 213.47058823529412) internal successors, (3629), 17 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:24,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 557.0) internal successors, (10026), 18 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:24,774 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 557.0) internal successors, (10026), 18 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:24,774 INFO L175 Difference]: Start difference. First operand has 564 places, 1167 transitions, 78737 flow. Second operand 17 states and 3629 transitions. [2022-12-13 15:44:24,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1218 transitions, 82980 flow [2022-12-13 15:44:33,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1218 transitions, 81934 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-12-13 15:44:33,112 INFO L231 Difference]: Finished difference. Result has 576 places, 1183 transitions, 81914 flow [2022-12-13 15:44:33,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=77505, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=749, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=81914, PETRI_PLACES=576, PETRI_TRANSITIONS=1183} [2022-12-13 15:44:33,113 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 553 predicate places. [2022-12-13 15:44:33,113 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1183 transitions, 81914 flow [2022-12-13 15:44:33,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 209.92307692307693) internal successors, (5458), 26 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:33,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:44:33,114 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:33,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-12-13 15:44:33,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:33,315 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:44:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash -516634478, now seen corresponding path program 86 times [2022-12-13 15:44:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:33,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365757280] [2022-12-13 15:44:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:33,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365757280] [2022-12-13 15:44:33,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365757280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:33,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738618162] [2022-12-13 15:44:33,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:44:33,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:33,903 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-12-13 15:44:34,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:44:34,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:34,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:44:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:34,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:44:34,222 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 46 treesize of output 30 [2022-12-13 15:44:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:34,404 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:44:34,404 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 [2022-12-13 15:44:34,430 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:44:34,431 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 [2022-12-13 15:44:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:34,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738618162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:34,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:34,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:44:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143199990] [2022-12-13 15:44:34,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:34,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:44:34,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:44:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:44:35,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:44:35,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1183 transitions, 81914 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:35,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:44:35,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:44:35,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:44:40,787 INFO L130 PetriNetUnfolder]: 3989/7203 cut-off events. [2022-12-13 15:44:40,787 INFO L131 PetriNetUnfolder]: For 1980112/1980112 co-relation queries the response was YES. [2022-12-13 15:44:40,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189748 conditions, 7203 events. 3989/7203 cut-off events. For 1980112/1980112 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 54041 event pairs, 1132 based on Foata normal form. 18/7221 useless extension candidates. Maximal degree in co-relation 189491. Up to 6552 conditions per place. [2022-12-13 15:44:40,933 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 1069 selfloop transitions, 134 changer transitions 1/1204 dead transitions. [2022-12-13 15:44:40,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1204 transitions, 84800 flow [2022-12-13 15:44:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:44:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:44:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2166 transitions. [2022-12-13 15:44:40,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3888689407540395 [2022-12-13 15:44:40,935 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2166 transitions. [2022-12-13 15:44:40,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2166 transitions. [2022-12-13 15:44:40,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:44:40,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2166 transitions. [2022-12-13 15:44:40,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 216.6) internal successors, (2166), 10 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:40,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:40,939 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:40,939 INFO L175 Difference]: Start difference. First operand has 576 places, 1183 transitions, 81914 flow. Second operand 10 states and 2166 transitions. [2022-12-13 15:44:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1204 transitions, 84800 flow [2022-12-13 15:44:50,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1204 transitions, 84102 flow, removed 202 selfloop flow, removed 9 redundant places. [2022-12-13 15:44:50,093 INFO L231 Difference]: Finished difference. Result has 577 places, 1183 transitions, 81539 flow [2022-12-13 15:44:50,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=81108, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=81539, PETRI_PLACES=577, PETRI_TRANSITIONS=1183} [2022-12-13 15:44:50,094 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 554 predicate places. [2022-12-13 15:44:50,094 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 1183 transitions, 81539 flow [2022-12-13 15:44:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:50,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:44:50,095 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:50,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-12-13 15:44:50,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:50,296 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:44:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1661933136, now seen corresponding path program 87 times [2022-12-13 15:44:50,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:50,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66587045] [2022-12-13 15:44:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66587045] [2022-12-13 15:44:50,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66587045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:50,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171530871] [2022-12-13 15:44:50,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:44:50,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:50,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:50,949 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:50,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-13 15:44:51,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:44:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:51,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:44:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:51,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:44:51,351 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 68 treesize of output 60 [2022-12-13 15:44:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:51,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:51,543 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-13 15:44:51,543 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 63 treesize of output 69 [2022-12-13 15:44:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:44:51,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171530871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:51,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:51,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2022-12-13 15:44:51,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746262766] [2022-12-13 15:44:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:51,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:44:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:51,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:44:51,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:44:52,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:44:52,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 1183 transitions, 81539 flow. Second operand has 21 states, 21 states have (on average 213.1904761904762) internal successors, (4477), 21 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:52,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:44:52,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:44:52,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:44:58,327 INFO L130 PetriNetUnfolder]: 3987/7204 cut-off events. [2022-12-13 15:44:58,327 INFO L131 PetriNetUnfolder]: For 1996618/1996618 co-relation queries the response was YES. [2022-12-13 15:44:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189639 conditions, 7204 events. 3987/7204 cut-off events. For 1996618/1996618 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54161 event pairs, 390 based on Foata normal form. 3/7207 useless extension candidates. Maximal degree in co-relation 189381. Up to 2745 conditions per place. [2022-12-13 15:44:58,460 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 132 selfloop transitions, 1126 changer transitions 9/1267 dead transitions. [2022-12-13 15:44:58,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1267 transitions, 88730 flow [2022-12-13 15:44:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:44:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:44:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2807 transitions. [2022-12-13 15:44:58,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3876536390001381 [2022-12-13 15:44:58,463 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2807 transitions. [2022-12-13 15:44:58,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2807 transitions. [2022-12-13 15:44:58,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:44:58,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2807 transitions. [2022-12-13 15:44:58,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 215.92307692307693) internal successors, (2807), 13 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:58,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:58,468 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 557.0) internal successors, (7798), 14 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:58,468 INFO L175 Difference]: Start difference. First operand has 577 places, 1183 transitions, 81539 flow. Second operand 13 states and 2807 transitions. [2022-12-13 15:44:58,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1267 transitions, 88730 flow [2022-12-13 15:45:08,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 1267 transitions, 88360 flow, removed 46 selfloop flow, removed 9 redundant places. [2022-12-13 15:45:08,623 INFO L231 Difference]: Finished difference. Result has 583 places, 1227 transitions, 88076 flow [2022-12-13 15:45:08,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=81174, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=88076, PETRI_PLACES=583, PETRI_TRANSITIONS=1227} [2022-12-13 15:45:08,624 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 560 predicate places. [2022-12-13 15:45:08,624 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1227 transitions, 88076 flow [2022-12-13 15:45:08,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 213.1904761904762) internal successors, (4477), 21 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:08,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:45:08,624 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:08,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-12-13 15:45:08,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-12-13 15:45:08,825 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:45:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash -398541274, now seen corresponding path program 88 times [2022-12-13 15:45:08,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275751157] [2022-12-13 15:45:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:45:09,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:09,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275751157] [2022-12-13 15:45:09,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275751157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:45:09,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204307777] [2022-12-13 15:45:09,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:45:09,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:09,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:09,518 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:09,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-12-13 15:45:09,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:45:09,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:45:09,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 15:45:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:09,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:45:09,778 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 15:45:09,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 15:45:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:45:09,822 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 15:45:09,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 15:45:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:45:10,110 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:45:10,110 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 39 treesize of output 40 [2022-12-13 15:45:10,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:10,202 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 46 treesize of output 30 [2022-12-13 15:45:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:45:10,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:10,509 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:45:10,510 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 86 treesize of output 111 [2022-12-13 15:45:10,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:10,522 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 50 treesize of output 50 [2022-12-13 15:45:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:45:10,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204307777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:45:10,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:45:10,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-12-13 15:45:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904146095] [2022-12-13 15:45:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:45:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:45:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:45:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=871, Unknown=1, NotChecked=0, Total=992 [2022-12-13 15:45:12,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 557 [2022-12-13 15:45:12,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1227 transitions, 88076 flow. Second operand has 32 states, 32 states have (on average 183.8125) internal successors, (5882), 32 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:12,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:45:12,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 557 [2022-12-13 15:45:12,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:45:21,829 INFO L130 PetriNetUnfolder]: 4175/7519 cut-off events. [2022-12-13 15:45:21,829 INFO L131 PetriNetUnfolder]: For 2079136/2079136 co-relation queries the response was YES. [2022-12-13 15:45:21,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201670 conditions, 7519 events. 4175/7519 cut-off events. For 2079136/2079136 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 56458 event pairs, 200 based on Foata normal form. 16/7535 useless extension candidates. Maximal degree in co-relation 201409. Up to 2937 conditions per place. [2022-12-13 15:45:21,981 INFO L137 encePairwiseOnDemand]: 547/557 looper letters, 349 selfloop transitions, 994 changer transitions 1/1344 dead transitions. [2022-12-13 15:45:21,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1344 transitions, 96533 flow [2022-12-13 15:45:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:45:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:45:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4303 transitions. [2022-12-13 15:45:21,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3358832253532121 [2022-12-13 15:45:21,985 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4303 transitions. [2022-12-13 15:45:21,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4303 transitions. [2022-12-13 15:45:21,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:45:21,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4303 transitions. [2022-12-13 15:45:21,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 187.08695652173913) internal successors, (4303), 23 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:21,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 557.0) internal successors, (13368), 24 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:21,993 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 557.0) internal successors, (13368), 24 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:21,993 INFO L175 Difference]: Start difference. First operand has 583 places, 1227 transitions, 88076 flow. Second operand 23 states and 4303 transitions. [2022-12-13 15:45:21,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1344 transitions, 96533 flow [2022-12-13 15:45:34,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1344 transitions, 94792 flow, removed 115 selfloop flow, removed 8 redundant places. [2022-12-13 15:45:34,708 INFO L231 Difference]: Finished difference. Result has 596 places, 1282 transitions, 93049 flow [2022-12-13 15:45:34,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=86042, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=941, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=93049, PETRI_PLACES=596, PETRI_TRANSITIONS=1282} [2022-12-13 15:45:34,709 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 573 predicate places. [2022-12-13 15:45:34,709 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1282 transitions, 93049 flow [2022-12-13 15:45:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 183.8125) internal successors, (5882), 32 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:34,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:45:34,710 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:34,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-12-13 15:45:34,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:34,911 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:45:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -176835806, now seen corresponding path program 89 times [2022-12-13 15:45:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:34,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127917827] [2022-12-13 15:45:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:45:35,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:35,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127917827] [2022-12-13 15:45:35,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127917827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:45:35,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349964502] [2022-12-13 15:45:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:45:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:35,609 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:35,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-12-13 15:45:35,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:45:35,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:45:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 15:45:35,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:36,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:45:36,061 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 [2022-12-13 15:45:36,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:36,163 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 58 treesize of output 51 [2022-12-13 15:45:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:45:36,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:36,567 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-13 15:45:36,567 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 [2022-12-13 15:45:36,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:36,586 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 [2022-12-13 15:45:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:45:36,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349964502] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:45:36,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:45:36,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2022-12-13 15:45:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178554447] [2022-12-13 15:45:36,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:45:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:45:36,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:45:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=739, Unknown=25, NotChecked=0, Total=870 [2022-12-13 15:45:38,943 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] [2022-12-13 15:45:41,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:43,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:45,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:47,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:49,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:51,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:54,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:56,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:58,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:46:00,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:46:00,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 557 [2022-12-13 15:46:00,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1282 transitions, 93049 flow. Second operand has 30 states, 30 states have (on average 188.86666666666667) internal successors, (5666), 30 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:00,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:00,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 557 [2022-12-13 15:46:00,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:08,098 INFO L130 PetriNetUnfolder]: 4197/7570 cut-off events. [2022-12-13 15:46:08,098 INFO L131 PetriNetUnfolder]: For 2127506/2127506 co-relation queries the response was YES. [2022-12-13 15:46:08,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203171 conditions, 7570 events. 4197/7570 cut-off events. For 2127506/2127506 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 57002 event pairs, 1318 based on Foata normal form. 6/7576 useless extension candidates. Maximal degree in co-relation 202907. Up to 7016 conditions per place. [2022-12-13 15:46:08,264 INFO L137 encePairwiseOnDemand]: 549/557 looper letters, 1109 selfloop transitions, 218 changer transitions 2/1329 dead transitions. [2022-12-13 15:46:08,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1329 transitions, 97100 flow [2022-12-13 15:46:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:46:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:46:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3646 transitions. [2022-12-13 15:46:08,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3445147878673344 [2022-12-13 15:46:08,267 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3646 transitions. [2022-12-13 15:46:08,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3646 transitions. [2022-12-13 15:46:08,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:08,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3646 transitions. [2022-12-13 15:46:08,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 191.89473684210526) internal successors, (3646), 19 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:08,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 557.0) internal successors, (11140), 20 states have internal predecessors, (11140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:08,274 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 557.0) internal successors, (11140), 20 states have internal predecessors, (11140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:08,274 INFO L175 Difference]: Start difference. First operand has 596 places, 1282 transitions, 93049 flow. Second operand 19 states and 3646 transitions. [2022-12-13 15:46:08,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1329 transitions, 97100 flow [2022-12-13 15:46:19,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1329 transitions, 94507 flow, removed 171 selfloop flow, removed 17 redundant places. [2022-12-13 15:46:20,031 INFO L231 Difference]: Finished difference. Result has 603 places, 1292 transitions, 91910 flow [2022-12-13 15:46:20,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=90216, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=91910, PETRI_PLACES=603, PETRI_TRANSITIONS=1292} [2022-12-13 15:46:20,032 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 580 predicate places. [2022-12-13 15:46:20,032 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1292 transitions, 91910 flow [2022-12-13 15:46:20,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 188.86666666666667) internal successors, (5666), 30 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:20,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:20,033 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:20,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-12-13 15:46:20,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:20,234 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:46:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash -519260254, now seen corresponding path program 90 times [2022-12-13 15:46:20,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:20,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590328107] [2022-12-13 15:46:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:46:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590328107] [2022-12-13 15:46:20,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590328107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:20,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954572466] [2022-12-13 15:46:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:46:20,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:20,796 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:20,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-13 15:46:21,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:46:21,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:46:21,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:46:21,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:21,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:46:21,165 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 46 treesize of output 30 [2022-12-13 15:46:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:46:21,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:21,359 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:46:21,360 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 [2022-12-13 15:46:21,392 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-13 15:46:21,392 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 [2022-12-13 15:46:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:46:21,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954572466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:21,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:21,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:46:21,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527325187] [2022-12-13 15:46:21,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:21,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:46:21,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:46:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:46:22,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:46:22,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1292 transitions, 91910 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:22,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:22,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:46:22,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:29,250 INFO L130 PetriNetUnfolder]: 4224/7618 cut-off events. [2022-12-13 15:46:29,250 INFO L131 PetriNetUnfolder]: For 1990411/1990411 co-relation queries the response was YES. [2022-12-13 15:46:29,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198797 conditions, 7618 events. 4224/7618 cut-off events. For 1990411/1990411 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 57487 event pairs, 1192 based on Foata normal form. 29/7647 useless extension candidates. Maximal degree in co-relation 198530. Up to 7001 conditions per place. [2022-12-13 15:46:29,394 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 1176 selfloop transitions, 136 changer transitions 0/1312 dead transitions. [2022-12-13 15:46:29,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1312 transitions, 95193 flow [2022-12-13 15:46:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:46:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:46:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2378 transitions. [2022-12-13 15:46:29,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3881181654969806 [2022-12-13 15:46:29,396 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2378 transitions. [2022-12-13 15:46:29,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2378 transitions. [2022-12-13 15:46:29,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:29,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2378 transitions. [2022-12-13 15:46:29,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.1818181818182) internal successors, (2378), 11 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:29,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:29,400 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 557.0) internal successors, (6684), 12 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:29,400 INFO L175 Difference]: Start difference. First operand has 603 places, 1292 transitions, 91910 flow. Second operand 11 states and 2378 transitions. [2022-12-13 15:46:29,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1312 transitions, 95193 flow [2022-12-13 15:46:39,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1312 transitions, 94606 flow, removed 176 selfloop flow, removed 8 redundant places. [2022-12-13 15:46:39,697 INFO L231 Difference]: Finished difference. Result has 603 places, 1291 transitions, 91552 flow [2022-12-13 15:46:39,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=91110, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=91552, PETRI_PLACES=603, PETRI_TRANSITIONS=1291} [2022-12-13 15:46:39,698 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 580 predicate places. [2022-12-13 15:46:39,698 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1291 transitions, 91552 flow [2022-12-13 15:46:39,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:39,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:39,699 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:39,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-12-13 15:46:39,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:39,900 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:46:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1951812736, now seen corresponding path program 91 times [2022-12-13 15:46:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:39,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131665212] [2022-12-13 15:46:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:39,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:46:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131665212] [2022-12-13 15:46:40,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131665212] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206119279] [2022-12-13 15:46:40,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:46:40,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:40,600 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:40,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-12-13 15:46:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:46:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:40,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:46:40,960 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 35 [2022-12-13 15:46:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:46:41,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:41,247 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-13 15:46:41,247 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 63 treesize of output 69 [2022-12-13 15:46:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:46:41,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206119279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:41,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:41,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-13 15:46:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743769610] [2022-12-13 15:46:41,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:41,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:46:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:46:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:46:42,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:46:42,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1291 transitions, 91552 flow. Second operand has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:42,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:42,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:46:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:48,728 INFO L130 PetriNetUnfolder]: 4258/7709 cut-off events. [2022-12-13 15:46:48,728 INFO L131 PetriNetUnfolder]: For 2003934/2003934 co-relation queries the response was YES. [2022-12-13 15:46:48,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201048 conditions, 7709 events. 4258/7709 cut-off events. For 2003934/2003934 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 58564 event pairs, 742 based on Foata normal form. 29/7738 useless extension candidates. Maximal degree in co-relation 200780. Up to 4945 conditions per place. [2022-12-13 15:46:48,878 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 1004 selfloop transitions, 325 changer transitions 0/1329 dead transitions. [2022-12-13 15:46:48,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1329 transitions, 95594 flow [2022-12-13 15:46:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:46:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:46:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2174 transitions. [2022-12-13 15:46:48,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39030520646319566 [2022-12-13 15:46:48,881 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2174 transitions. [2022-12-13 15:46:48,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2174 transitions. [2022-12-13 15:46:48,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:48,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2174 transitions. [2022-12-13 15:46:48,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 217.4) internal successors, (2174), 10 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:48,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:48,884 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 557.0) internal successors, (6127), 11 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:48,884 INFO L175 Difference]: Start difference. First operand has 603 places, 1291 transitions, 91552 flow. Second operand 10 states and 2174 transitions. [2022-12-13 15:46:48,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1329 transitions, 95594 flow [2022-12-13 15:46:59,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 1329 transitions, 95198 flow, removed 66 selfloop flow, removed 8 redundant places. [2022-12-13 15:46:59,833 INFO L231 Difference]: Finished difference. Result has 606 places, 1291 transitions, 91788 flow [2022-12-13 15:46:59,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=90954, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=91788, PETRI_PLACES=606, PETRI_TRANSITIONS=1291} [2022-12-13 15:46:59,834 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 583 predicate places. [2022-12-13 15:46:59,834 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1291 transitions, 91788 flow [2022-12-13 15:46:59,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 213.15) internal successors, (4263), 20 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:59,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:59,834 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:59,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-12-13 15:47:00,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:00,036 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:47:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1394423728, now seen corresponding path program 92 times [2022-12-13 15:47:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:00,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591508672] [2022-12-13 15:47:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:00,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:47:00,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591508672] [2022-12-13 15:47:00,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591508672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644147885] [2022-12-13 15:47:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:47:00,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:00,703 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:00,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-12-13 15:47:00,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:47:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:00,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:47:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:01,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:47:01,115 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 58 treesize of output 51 [2022-12-13 15:47:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:47:01,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:01,334 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-13 15:47:01,334 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 63 treesize of output 69 [2022-12-13 15:47:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:47:01,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644147885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:01,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:01,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:47:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760979868] [2022-12-13 15:47:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:47:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:47:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:47:02,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:47:02,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1291 transitions, 91788 flow. Second operand has 22 states, 22 states have (on average 213.0) internal successors, (4686), 22 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:02,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:02,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:47:02,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:09,190 INFO L130 PetriNetUnfolder]: 4248/7678 cut-off events. [2022-12-13 15:47:09,191 INFO L131 PetriNetUnfolder]: For 1982984/1982984 co-relation queries the response was YES. [2022-12-13 15:47:09,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200757 conditions, 7678 events. 4248/7678 cut-off events. For 1982984/1982984 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 58227 event pairs, 744 based on Foata normal form. 3/7681 useless extension candidates. Maximal degree in co-relation 200487. Up to 4945 conditions per place. [2022-12-13 15:47:09,342 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 992 selfloop transitions, 332 changer transitions 2/1326 dead transitions. [2022-12-13 15:47:09,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1326 transitions, 95406 flow [2022-12-13 15:47:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:47:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:47:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2598 transitions. [2022-12-13 15:47:09,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388689407540395 [2022-12-13 15:47:09,344 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2598 transitions. [2022-12-13 15:47:09,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2598 transitions. [2022-12-13 15:47:09,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:09,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2598 transitions. [2022-12-13 15:47:09,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 216.5) internal successors, (2598), 12 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:09,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:09,349 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 557.0) internal successors, (7241), 13 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:09,349 INFO L175 Difference]: Start difference. First operand has 606 places, 1291 transitions, 91788 flow. Second operand 12 states and 2598 transitions. [2022-12-13 15:47:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1326 transitions, 95406 flow [2022-12-13 15:47:20,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1326 transitions, 94943 flow, removed 52 selfloop flow, removed 5 redundant places. [2022-12-13 15:47:20,387 INFO L231 Difference]: Finished difference. Result has 615 places, 1298 transitions, 92694 flow [2022-12-13 15:47:20,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=91125, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=92694, PETRI_PLACES=615, PETRI_TRANSITIONS=1298} [2022-12-13 15:47:20,388 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 592 predicate places. [2022-12-13 15:47:20,388 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 1298 transitions, 92694 flow [2022-12-13 15:47:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 213.0) internal successors, (4686), 22 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:20,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:20,388 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:20,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-12-13 15:47:20,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:20,590 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:47:20,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2105526998, now seen corresponding path program 93 times [2022-12-13 15:47:20,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001068998] [2022-12-13 15:47:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:20,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:47:21,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001068998] [2022-12-13 15:47:21,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001068998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232561231] [2022-12-13 15:47:21,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:47:21,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:21,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:21,318 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:21,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9bd48-8d62-4130-a89d-87a14df03b31/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-12-13 15:47:21,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:47:21,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:47:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:47:21,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:21,986 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-13 15:47:21,986 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 63 treesize of output 69 [2022-12-13 15:47:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 15:47:22,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232561231] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:22,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:22,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-13 15:47:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572625889] [2022-12-13 15:47:22,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:47:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:47:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:47:23,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 557 [2022-12-13 15:47:23,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 1298 transitions, 92694 flow. Second operand has 22 states, 22 states have (on average 213.0) internal successors, (4686), 22 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:23,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:23,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 557 [2022-12-13 15:47:23,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:30,263 INFO L130 PetriNetUnfolder]: 4238/7643 cut-off events. [2022-12-13 15:47:30,263 INFO L131 PetriNetUnfolder]: For 1975770/1975770 co-relation queries the response was YES. [2022-12-13 15:47:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199745 conditions, 7643 events. 4238/7643 cut-off events. For 1975770/1975770 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57770 event pairs, 750 based on Foata normal form. 2/7645 useless extension candidates. Maximal degree in co-relation 199472. Up to 4945 conditions per place. [2022-12-13 15:47:30,410 INFO L137 encePairwiseOnDemand]: 550/557 looper letters, 990 selfloop transitions, 315 changer transitions 6/1311 dead transitions. [2022-12-13 15:47:30,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1311 transitions, 94980 flow [2022-12-13 15:47:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:47:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:47:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1949 transitions. [2022-12-13 15:47:30,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38878914821464194 [2022-12-13 15:47:30,413 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1949 transitions. [2022-12-13 15:47:30,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1949 transitions. [2022-12-13 15:47:30,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:30,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1949 transitions. [2022-12-13 15:47:30,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.55555555555554) internal successors, (1949), 9 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:30,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:30,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 557.0) internal successors, (5570), 10 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:30,416 INFO L175 Difference]: Start difference. First operand has 615 places, 1298 transitions, 92694 flow. Second operand 9 states and 1949 transitions. [2022-12-13 15:47:30,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1311 transitions, 94980 flow