./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/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_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/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_5174703e-f0c4-4a45-a690-a6793c76a38d/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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:08:09,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:08:09,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:08:09,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:08:09,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:08:09,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:08:09,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:08:09,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:08:09,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:08:09,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:08:09,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:08:09,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:08:09,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:08:09,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:08:09,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:08:09,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:08:09,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:08:09,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:08:09,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:08:09,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:08:09,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:08:09,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:08:09,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:08:09,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:08:09,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:08:09,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:08:09,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:08:09,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:08:09,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:08:09,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:08:09,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:08:09,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:08:09,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:08:09,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:08:09,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:08:09,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:08:09,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:08:09,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:08:09,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:08:09,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:08:09,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:08:09,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:08:09,207 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:08:09,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:08:09,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:08:09,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:08:09,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:08:09,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:08:09,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:08:09,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:08:09,209 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:08:09,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:08:09,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:08:09,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:08:09,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:08:09,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:08:09,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:08:09,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:08:09,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:08:09,216 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:08:09,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:08:09,216 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:08:09,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:08:09,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:08:09,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:08:09,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:08:09,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:08:09,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:08:09,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:08:09,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:08:09,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:08:09,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:08:09,219 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:08:09,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:08:09,219 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:08:09,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:08:09,219 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:08:09,219 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_5174703e-f0c4-4a45-a690-a6793c76a38d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-12-13 11:08:09,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:08:09,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:08:09,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:08:09,425 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:08:09,425 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:08:09,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-12-13 11:08:11,929 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:08:12,105 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:08:12,106 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-12-13 11:08:12,111 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/data/0ae57305a/102aee36e02e4f7e9c05ef288bfa2e6c/FLAGcd79830c6 [2022-12-13 11:08:12,486 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/data/0ae57305a/102aee36e02e4f7e9c05ef288bfa2e6c [2022-12-13 11:08:12,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:08:12,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:08:12,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:08:12,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:08:12,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:08:12,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc1028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12, skipping insertion in model container [2022-12-13 11:08:12,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:08:12,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:08:12,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:08:12,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:08:12,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:08:12,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:08:12,649 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_5174703e-f0c4-4a45-a690-a6793c76a38d/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-12-13 11:08:12,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:08:12,666 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:08:12,678 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:08:12,679 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:08:12,680 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:08:12,681 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:08:12,684 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_5174703e-f0c4-4a45-a690-a6793c76a38d/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-12-13 11:08:12,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:08:12,697 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:08:12,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12 WrapperNode [2022-12-13 11:08:12,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:08:12,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:08:12,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:08:12,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:08:12,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,732 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-12-13 11:08:12,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:08:12,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:08:12,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:08:12,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:08:12,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:08:12,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:08:12,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:08:12,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:08:12,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (1/1) ... [2022-12-13 11:08:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:08:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:12,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:08:12,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:08:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:08:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:08:12,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:08:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:08:12,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:08:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:08:12,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:08:12,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:08:12,827 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:08:12,904 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:08:12,905 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:08:13,092 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:08:13,152 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:08:13,152 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:08:13,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:08:13 BoogieIcfgContainer [2022-12-13 11:08:13,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:08:13,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:08:13,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:08:13,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:08:13,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:08:12" (1/3) ... [2022-12-13 11:08:13,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676a7f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:08:13, skipping insertion in model container [2022-12-13 11:08:13,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:12" (2/3) ... [2022-12-13 11:08:13,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676a7f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:08:13, skipping insertion in model container [2022-12-13 11:08:13,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:08:13" (3/3) ... [2022-12-13 11:08:13,160 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-12-13 11:08:13,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:08:13,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:08:13,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:08:13,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:08:13,214 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:08:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-12-13 11:08:13,284 INFO L130 PetriNetUnfolder]: 9/114 cut-off events. [2022-12-13 11:08:13,284 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:08:13,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-12-13 11:08:13,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-12-13 11:08:13,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-12-13 11:08:13,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:08:13,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2022-12-13 11:08:13,311 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2022-12-13 11:08:13,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2022-12-13 11:08:13,346 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2022-12-13 11:08:13,346 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:08:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-12-13 11:08:13,355 INFO L119 LiptonReduction]: Number of co-enabled transitions 368 [2022-12-13 11:08:16,147 INFO L134 LiptonReduction]: Checked pairs total: 449 [2022-12-13 11:08:16,147 INFO L136 LiptonReduction]: Total number of compositions: 108 [2022-12-13 11:08:16,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:08:16,166 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;@579578a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:08:16,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 11:08:16,170 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2022-12-13 11:08:16,171 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:08:16,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:16,171 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:16,172 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 11:08:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash 574398056, now seen corresponding path program 1 times [2022-12-13 11:08:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:16,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188730285] [2022-12-13 11:08:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188730285] [2022-12-13 11:08:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188730285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:16,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:16,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133940775] [2022-12-13 11:08:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:16,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:16,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 224 [2022-12-13 11:08:16,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:16,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 224 [2022-12-13 11:08:16,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:16,514 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2022-12-13 11:08:16,514 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 11:08:16,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 134 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2022-12-13 11:08:16,516 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2022-12-13 11:08:16,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2022-12-13 11:08:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2022-12-13 11:08:16,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48660714285714285 [2022-12-13 11:08:16,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2022-12-13 11:08:16,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2022-12-13 11:08:16,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:16,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2022-12-13 11:08:16,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,538 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 327 transitions. [2022-12-13 11:08:16,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2022-12-13 11:08:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:08:16,541 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2022-12-13 11:08:16,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-12-13 11:08:16,545 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2022-12-13 11:08:16,545 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2022-12-13 11:08:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:16,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:16,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:08:16,546 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 11:08:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash 492170775, now seen corresponding path program 1 times [2022-12-13 11:08:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828129131] [2022-12-13 11:08:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:16,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:16,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828129131] [2022-12-13 11:08:16,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828129131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:16,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:16,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:08:16,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273437843] [2022-12-13 11:08:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:16,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:16,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:16,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2022-12-13 11:08:16,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:16,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2022-12-13 11:08:16,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:16,667 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2022-12-13 11:08:16,668 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-12-13 11:08:16,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 261 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2022-12-13 11:08:16,668 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2022-12-13 11:08:16,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2022-12-13 11:08:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2022-12-13 11:08:16,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49255952380952384 [2022-12-13 11:08:16,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2022-12-13 11:08:16,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2022-12-13 11:08:16,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:16,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2022-12-13 11:08:16,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,675 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 331 transitions. [2022-12-13 11:08:16,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2022-12-13 11:08:16,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:16,676 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2022-12-13 11:08:16,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2022-12-13 11:08:16,677 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2022-12-13 11:08:16,677 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2022-12-13 11:08:16,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:16,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:16,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:08:16,678 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 11:08:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash -362788377, now seen corresponding path program 1 times [2022-12-13 11:08:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:16,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922306006] [2022-12-13 11:08:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922306006] [2022-12-13 11:08:16,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922306006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:16,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:16,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:08:16,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494749961] [2022-12-13 11:08:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:16,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:16,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2022-12-13 11:08:16,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:16,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2022-12-13 11:08:16,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:16,899 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2022-12-13 11:08:16,900 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-12-13 11:08:16,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2022-12-13 11:08:16,901 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2022-12-13 11:08:16,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2022-12-13 11:08:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2022-12-13 11:08:16,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2022-12-13 11:08:16,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2022-12-13 11:08:16,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2022-12-13 11:08:16,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:16,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2022-12-13 11:08:16,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,907 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 411 transitions. [2022-12-13 11:08:16,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2022-12-13 11:08:16,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:16,908 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2022-12-13 11:08:16,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2022-12-13 11:08:16,909 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2022-12-13 11:08:16,909 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2022-12-13 11:08:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:16,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:16,909 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:16,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:08:16,910 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 11:08:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash 533555418, now seen corresponding path program 1 times [2022-12-13 11:08:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:16,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130345767] [2022-12-13 11:08:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:16,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:17,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:17,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130345767] [2022-12-13 11:08:17,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130345767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:17,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678669336] [2022-12-13 11:08:17,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:17,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:17,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:17,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:17,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:08:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 11:08:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:17,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 11:08:17,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:08:17,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:17,520 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 11:08:17,552 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 15 treesize of output 7 [2022-12-13 11:08:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:17,596 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-12-13 11:08:17,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:17,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-12-13 11:08:17,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:17,699 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 184 treesize of output 167 [2022-12-13 11:08:17,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-12-13 11:08:17,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:17,714 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 133 treesize of output 122 [2022-12-13 11:08:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 11:08:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678669336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:17,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-12-13 11:08:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759765258] [2022-12-13 11:08:17,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:08:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:08:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=4, NotChecked=26, Total=240 [2022-12-13 11:08:17,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2022-12-13 11:08:17,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 16 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:17,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:17,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2022-12-13 11:08:17,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:18,122 INFO L130 PetriNetUnfolder]: 84/158 cut-off events. [2022-12-13 11:08:18,122 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-12-13 11:08:18,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 158 events. 84/158 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 440 event pairs, 11 based on Foata normal form. 1/158 useless extension candidates. Maximal degree in co-relation 385. Up to 37 conditions per place. [2022-12-13 11:08:18,123 INFO L137 encePairwiseOnDemand]: 214/224 looper letters, 27 selfloop transitions, 11 changer transitions 10/48 dead transitions. [2022-12-13 11:08:18,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 48 transitions, 245 flow [2022-12-13 11:08:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:08:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:08:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 546 transitions. [2022-12-13 11:08:18,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2022-12-13 11:08:18,126 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 546 transitions. [2022-12-13 11:08:18,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 546 transitions. [2022-12-13 11:08:18,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:18,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 546 transitions. [2022-12-13 11:08:18,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,132 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,132 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 7 states and 546 transitions. [2022-12-13 11:08:18,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 48 transitions, 245 flow [2022-12-13 11:08:18,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 48 transitions, 239 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:18,134 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 140 flow [2022-12-13 11:08:18,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2022-12-13 11:08:18,135 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 11 predicate places. [2022-12-13 11:08:18,135 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 140 flow [2022-12-13 11:08:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:18,136 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:18,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:08:18,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 11:08:18,339 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 11:08:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1926057411, now seen corresponding path program 2 times [2022-12-13 11:08:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897370256] [2022-12-13 11:08:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:18,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897370256] [2022-12-13 11:08:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897370256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810468358] [2022-12-13 11:08:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:08:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:18,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:08:18,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:08:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:08:18,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:18,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:18,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810468358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:18,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:18,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-12-13 11:08:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580056101] [2022-12-13 11:08:18,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:18,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:18,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2022-12-13 11:08:18,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:18,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2022-12-13 11:08:18,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:18,723 INFO L130 PetriNetUnfolder]: 164/319 cut-off events. [2022-12-13 11:08:18,724 INFO L131 PetriNetUnfolder]: For 369/369 co-relation queries the response was YES. [2022-12-13 11:08:18,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 319 events. 164/319 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1212 event pairs, 49 based on Foata normal form. 12/330 useless extension candidates. Maximal degree in co-relation 1057. Up to 145 conditions per place. [2022-12-13 11:08:18,726 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 42 selfloop transitions, 9 changer transitions 1/52 dead transitions. [2022-12-13 11:08:18,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 52 transitions, 385 flow [2022-12-13 11:08:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2022-12-13 11:08:18,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4966517857142857 [2022-12-13 11:08:18,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2022-12-13 11:08:18,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2022-12-13 11:08:18,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:18,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2022-12-13 11:08:18,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,732 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 140 flow. Second operand 4 states and 445 transitions. [2022-12-13 11:08:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 52 transitions, 385 flow [2022-12-13 11:08:18,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 52 transitions, 361 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 11:08:18,736 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 218 flow [2022-12-13 11:08:18,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2022-12-13 11:08:18,736 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 12 predicate places. [2022-12-13 11:08:18,736 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 218 flow [2022-12-13 11:08:18,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:18,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:18,737 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:18,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:08:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:18,938 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 11:08:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2091100051, now seen corresponding path program 3 times [2022-12-13 11:08:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:18,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745320315] [2022-12-13 11:08:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745320315] [2022-12-13 11:08:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745320315] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100093738] [2022-12-13 11:08:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:08:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:19,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:19,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:19,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:08:19,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:08:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 11:08:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:19,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 11:08:19,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:08:19,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:08:19,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:08:19,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:19,286 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 17 treesize of output 10 [2022-12-13 11:08:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:19,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:19,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:19,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-12-13 11:08:19,542 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-12-13 11:08:19,542 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 324 treesize of output 297 [2022-12-13 11:08:19,552 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-13 11:08:19,553 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 286 treesize of output 226 [2022-12-13 11:08:19,564 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-13 11:08:19,565 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 226 treesize of output 196 [2022-12-13 11:08:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:19,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100093738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:19,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:19,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2022-12-13 11:08:19,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192786171] [2022-12-13 11:08:19,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:19,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:08:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:19,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:08:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2022-12-13 11:08:19,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2022-12-13 11:08:19,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 218 flow. Second operand has 17 states, 17 states have (on average 69.6470588235294) internal successors, (1184), 17 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:19,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:19,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2022-12-13 11:08:19,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:22,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:08:24,125 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 11:08:24,413 INFO L130 PetriNetUnfolder]: 224/464 cut-off events. [2022-12-13 11:08:24,413 INFO L131 PetriNetUnfolder]: For 728/728 co-relation queries the response was YES. [2022-12-13 11:08:24,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 464 events. 224/464 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2063 event pairs, 74 based on Foata normal form. 23/485 useless extension candidates. Maximal degree in co-relation 1174. Up to 225 conditions per place. [2022-12-13 11:08:24,415 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 32 selfloop transitions, 7 changer transitions 45/84 dead transitions. [2022-12-13 11:08:24,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 84 transitions, 619 flow [2022-12-13 11:08:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:08:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:08:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 739 transitions. [2022-12-13 11:08:24,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3299107142857143 [2022-12-13 11:08:24,420 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 739 transitions. [2022-12-13 11:08:24,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 739 transitions. [2022-12-13 11:08:24,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:24,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 739 transitions. [2022-12-13 11:08:24,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:24,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:24,424 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:24,424 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 218 flow. Second operand 10 states and 739 transitions. [2022-12-13 11:08:24,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 84 transitions, 619 flow [2022-12-13 11:08:24,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 84 transitions, 609 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-12-13 11:08:24,427 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 250 flow [2022-12-13 11:08:24,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=250, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2022-12-13 11:08:24,428 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 27 predicate places. [2022-12-13 11:08:24,428 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 250 flow [2022-12-13 11:08:24,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.6470588235294) internal successors, (1184), 17 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:24,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:24,428 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:24,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:08:24,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:24,629 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 11:08:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1453572020, now seen corresponding path program 4 times [2022-12-13 11:08:24,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:24,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717734113] [2022-12-13 11:08:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717734113] [2022-12-13 11:08:24,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717734113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744547849] [2022-12-13 11:08:24,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:08:24,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:24,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:24,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:08:25,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:08:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:08:25,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:25,142 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 19 treesize of output 7 [2022-12-13 11:08:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:25,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:25,204 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:08:25,205 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 28 treesize of output 13 [2022-12-13 11:08:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:25,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744547849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:25,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:25,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 15 [2022-12-13 11:08:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239162892] [2022-12-13 11:08:25,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:25,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:08:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:08:25,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:08:25,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2022-12-13 11:08:25,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 250 flow. Second operand has 17 states, 17 states have (on average 92.41176470588235) internal successors, (1571), 17 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:25,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:25,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2022-12-13 11:08:25,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:25,944 INFO L130 PetriNetUnfolder]: 374/704 cut-off events. [2022-12-13 11:08:25,944 INFO L131 PetriNetUnfolder]: For 1322/1322 co-relation queries the response was YES. [2022-12-13 11:08:25,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 704 events. 374/704 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3403 event pairs, 41 based on Foata normal form. 5/708 useless extension candidates. Maximal degree in co-relation 2666. Up to 313 conditions per place. [2022-12-13 11:08:25,947 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 79 selfloop transitions, 31 changer transitions 52/162 dead transitions. [2022-12-13 11:08:25,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 162 transitions, 1206 flow [2022-12-13 11:08:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 11:08:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 11:08:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1765 transitions. [2022-12-13 11:08:25,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43774801587301587 [2022-12-13 11:08:25,951 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1765 transitions. [2022-12-13 11:08:25,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1765 transitions. [2022-12-13 11:08:25,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:25,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1765 transitions. [2022-12-13 11:08:25,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 98.05555555555556) internal successors, (1765), 18 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:25,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:25,959 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:25,959 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 250 flow. Second operand 18 states and 1765 transitions. [2022-12-13 11:08:25,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 162 transitions, 1206 flow [2022-12-13 11:08:25,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 162 transitions, 1152 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-12-13 11:08:25,964 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 478 flow [2022-12-13 11:08:25,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-12-13 11:08:25,965 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 36 predicate places. [2022-12-13 11:08:25,965 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 478 flow [2022-12-13 11:08:25,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 92.41176470588235) internal successors, (1571), 17 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:25,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:25,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:25,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:08:26,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:26,167 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 11:08:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash -737751812, now seen corresponding path program 5 times [2022-12-13 11:08:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23129008] [2022-12-13 11:08:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:26,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:26,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23129008] [2022-12-13 11:08:26,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23129008] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614432133] [2022-12-13 11:08:26,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:08:26,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:26,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:26,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:08:26,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:08:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 11:08:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:26,979 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 21 treesize of output 23 [2022-12-13 11:08:27,100 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 11:08:27,100 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 21 treesize of output 10 [2022-12-13 11:08:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:27,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:27,170 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_206 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_206) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-12-13 11:08:27,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:27,188 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 47 treesize of output 37 [2022-12-13 11:08:27,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-13 11:08:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-12-13 11:08:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614432133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:27,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:27,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 11:08:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73439203] [2022-12-13 11:08:27,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:08:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:08:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=444, Unknown=1, NotChecked=42, Total=552 [2022-12-13 11:08:27,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 224 [2022-12-13 11:08:27,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 478 flow. Second operand has 24 states, 24 states have (on average 71.95833333333333) internal successors, (1727), 24 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:27,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:27,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 224 [2022-12-13 11:08:27,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:28,150 INFO L130 PetriNetUnfolder]: 432/799 cut-off events. [2022-12-13 11:08:28,150 INFO L131 PetriNetUnfolder]: For 1944/1944 co-relation queries the response was YES. [2022-12-13 11:08:28,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3192 conditions, 799 events. 432/799 cut-off events. For 1944/1944 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3896 event pairs, 51 based on Foata normal form. 1/799 useless extension candidates. Maximal degree in co-relation 3154. Up to 355 conditions per place. [2022-12-13 11:08:28,154 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 55 selfloop transitions, 37 changer transitions 32/124 dead transitions. [2022-12-13 11:08:28,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 124 transitions, 1048 flow [2022-12-13 11:08:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:08:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:08:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1007 transitions. [2022-12-13 11:08:28,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34581043956043955 [2022-12-13 11:08:28,158 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1007 transitions. [2022-12-13 11:08:28,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1007 transitions. [2022-12-13 11:08:28,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:28,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1007 transitions. [2022-12-13 11:08:28,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 77.46153846153847) internal successors, (1007), 13 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 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 11:08:28,165 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 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 11:08:28,165 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 478 flow. Second operand 13 states and 1007 transitions. [2022-12-13 11:08:28,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 124 transitions, 1048 flow [2022-12-13 11:08:28,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 124 transitions, 940 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-12-13 11:08:28,173 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 536 flow [2022-12-13 11:08:28,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=536, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-12-13 11:08:28,174 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2022-12-13 11:08:28,174 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 536 flow [2022-12-13 11:08:28,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 71.95833333333333) internal successors, (1727), 24 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:28,175 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:28,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:08:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:28,377 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 11:08:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash 990537375, now seen corresponding path program 6 times [2022-12-13 11:08:28,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:28,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617297584] [2022-12-13 11:08:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:28,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:28,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617297584] [2022-12-13 11:08:28,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617297584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155398614] [2022-12-13 11:08:28,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:08:28,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:28,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:28,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:28,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:08:28,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:08:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:08:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:28,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:28,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155398614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:28,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:28,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-12-13 11:08:28,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763905970] [2022-12-13 11:08:28,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:28,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:08:28,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:28,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:08:28,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:08:28,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2022-12-13 11:08:28,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:28,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2022-12-13 11:08:28,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:28,895 INFO L130 PetriNetUnfolder]: 774/1455 cut-off events. [2022-12-13 11:08:28,895 INFO L131 PetriNetUnfolder]: For 4182/4182 co-relation queries the response was YES. [2022-12-13 11:08:28,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6316 conditions, 1455 events. 774/1455 cut-off events. For 4182/4182 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8359 event pairs, 177 based on Foata normal form. 18/1472 useless extension candidates. Maximal degree in co-relation 6277. Up to 706 conditions per place. [2022-12-13 11:08:28,900 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 67 selfloop transitions, 45 changer transitions 3/115 dead transitions. [2022-12-13 11:08:28,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1241 flow [2022-12-13 11:08:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:08:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:08:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2022-12-13 11:08:28,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4982142857142857 [2022-12-13 11:08:28,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2022-12-13 11:08:28,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2022-12-13 11:08:28,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:28,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2022-12-13 11:08:28,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,904 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,904 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 536 flow. Second operand 5 states and 558 transitions. [2022-12-13 11:08:28,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1241 flow [2022-12-13 11:08:28,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 1162 flow, removed 17 selfloop flow, removed 7 redundant places. [2022-12-13 11:08:28,912 INFO L231 Difference]: Finished difference. Result has 62 places, 83 transitions, 881 flow [2022-12-13 11:08:28,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=881, PETRI_PLACES=62, PETRI_TRANSITIONS=83} [2022-12-13 11:08:28,913 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 43 predicate places. [2022-12-13 11:08:28,913 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 83 transitions, 881 flow [2022-12-13 11:08:28,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:28,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:28,913 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:28,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:08:29,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:29,114 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 11:08:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 726076091, now seen corresponding path program 7 times [2022-12-13 11:08:29,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:29,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298568246] [2022-12-13 11:08:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:29,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298568246] [2022-12-13 11:08:29,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298568246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122653760] [2022-12-13 11:08:29,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:08:29,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:29,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:29,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:08:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:08:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:29,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:29,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122653760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:29,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:29,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-12-13 11:08:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886704995] [2022-12-13 11:08:29,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:08:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:08:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:08:29,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2022-12-13 11:08:29,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 83 transitions, 881 flow. Second operand has 22 states, 22 states have (on average 94.86363636363636) internal successors, (2087), 22 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:29,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:29,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2022-12-13 11:08:29,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:30,379 INFO L130 PetriNetUnfolder]: 981/1914 cut-off events. [2022-12-13 11:08:30,380 INFO L131 PetriNetUnfolder]: For 6334/6334 co-relation queries the response was YES. [2022-12-13 11:08:30,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 1914 events. 981/1914 cut-off events. For 6334/6334 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11963 event pairs, 481 based on Foata normal form. 56/1968 useless extension candidates. Maximal degree in co-relation 7939. Up to 1448 conditions per place. [2022-12-13 11:08:30,386 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 80 selfloop transitions, 4 changer transitions 75/159 dead transitions. [2022-12-13 11:08:30,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 1717 flow [2022-12-13 11:08:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:08:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:08:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1195 transitions. [2022-12-13 11:08:30,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4445684523809524 [2022-12-13 11:08:30,388 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1195 transitions. [2022-12-13 11:08:30,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1195 transitions. [2022-12-13 11:08:30,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:30,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1195 transitions. [2022-12-13 11:08:30,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.58333333333333) internal successors, (1195), 12 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:30,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:30,393 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:30,393 INFO L175 Difference]: Start difference. First operand has 62 places, 83 transitions, 881 flow. Second operand 12 states and 1195 transitions. [2022-12-13 11:08:30,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 1717 flow [2022-12-13 11:08:30,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 159 transitions, 1677 flow, removed 20 selfloop flow, removed 0 redundant places. [2022-12-13 11:08:30,409 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 927 flow [2022-12-13 11:08:30,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=927, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2022-12-13 11:08:30,410 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 62 predicate places. [2022-12-13 11:08:30,410 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 927 flow [2022-12-13 11:08:30,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.86363636363636) internal successors, (2087), 22 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:30,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:30,411 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:30,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:08:30,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:30,613 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 11:08:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1115539836, now seen corresponding path program 8 times [2022-12-13 11:08:30,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:30,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235503739] [2022-12-13 11:08:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:30,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:31,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235503739] [2022-12-13 11:08:31,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235503739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185317966] [2022-12-13 11:08:31,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:08:31,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:31,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:31,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:31,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:08:31,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:08:31,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:08:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:31,371 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 19 treesize of output 7 [2022-12-13 11:08:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:08:31,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:31,437 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:08:31,437 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 28 treesize of output 13 [2022-12-13 11:08:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:08:31,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185317966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:31,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:31,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 23 [2022-12-13 11:08:31,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463206823] [2022-12-13 11:08:31,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:31,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 11:08:31,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 11:08:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:08:31,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2022-12-13 11:08:31,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 927 flow. Second operand has 25 states, 25 states have (on average 92.12) internal successors, (2303), 25 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:31,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:31,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2022-12-13 11:08:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:33,340 INFO L130 PetriNetUnfolder]: 1180/2194 cut-off events. [2022-12-13 11:08:33,340 INFO L131 PetriNetUnfolder]: For 7170/7170 co-relation queries the response was YES. [2022-12-13 11:08:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9908 conditions, 2194 events. 1180/2194 cut-off events. For 7170/7170 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13320 event pairs, 91 based on Foata normal form. 12/2205 useless extension candidates. Maximal degree in co-relation 9859. Up to 1101 conditions per place. [2022-12-13 11:08:33,348 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 156 selfloop transitions, 104 changer transitions 131/391 dead transitions. [2022-12-13 11:08:33,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 391 transitions, 3485 flow [2022-12-13 11:08:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 11:08:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 11:08:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4115 transitions. [2022-12-13 11:08:33,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4373937074829932 [2022-12-13 11:08:33,353 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4115 transitions. [2022-12-13 11:08:33,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4115 transitions. [2022-12-13 11:08:33,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:33,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4115 transitions. [2022-12-13 11:08:33,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 97.97619047619048) internal successors, (4115), 42 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 224.0) internal successors, (9632), 43 states have internal predecessors, (9632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,369 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 224.0) internal successors, (9632), 43 states have internal predecessors, (9632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,369 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 927 flow. Second operand 42 states and 4115 transitions. [2022-12-13 11:08:33,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 391 transitions, 3485 flow [2022-12-13 11:08:33,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 391 transitions, 3395 flow, removed 42 selfloop flow, removed 10 redundant places. [2022-12-13 11:08:33,388 INFO L231 Difference]: Finished difference. Result has 117 places, 125 transitions, 1634 flow [2022-12-13 11:08:33,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1634, PETRI_PLACES=117, PETRI_TRANSITIONS=125} [2022-12-13 11:08:33,388 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 98 predicate places. [2022-12-13 11:08:33,388 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 125 transitions, 1634 flow [2022-12-13 11:08:33,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 92.12) internal successors, (2303), 25 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:33,389 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:33,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:08:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 11:08:33,591 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 11:08:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash 665538714, now seen corresponding path program 9 times [2022-12-13 11:08:33,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:33,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378967134] [2022-12-13 11:08:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:33,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:34,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:34,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378967134] [2022-12-13 11:08:34,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378967134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:34,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728157306] [2022-12-13 11:08:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:08:34,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:34,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:34,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:08:34,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:08:34,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 11:08:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:34,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:08:34,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:08:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:34,520 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 21 treesize of output 23 [2022-12-13 11:08:34,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:08:34,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:34,716 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 17 treesize of output 10 [2022-12-13 11:08:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:34,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:35,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:35,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-12-13 11:08:35,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:35,133 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 110 treesize of output 100 [2022-12-13 11:08:35,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-12-13 11:08:35,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:35,150 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 55 treesize of output 49 [2022-12-13 11:08:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:08:35,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728157306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:35,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:35,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2022-12-13 11:08:35,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171282688] [2022-12-13 11:08:35,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:35,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 11:08:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 11:08:35,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-12-13 11:08:36,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 224 [2022-12-13 11:08:36,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 125 transitions, 1634 flow. Second operand has 32 states, 32 states have (on average 79.71875) internal successors, (2551), 32 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:36,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:36,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 224 [2022-12-13 11:08:36,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:41,473 INFO L130 PetriNetUnfolder]: 2795/5184 cut-off events. [2022-12-13 11:08:41,473 INFO L131 PetriNetUnfolder]: For 21773/21773 co-relation queries the response was YES. [2022-12-13 11:08:41,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24702 conditions, 5184 events. 2795/5184 cut-off events. For 21773/21773 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37466 event pairs, 235 based on Foata normal form. 6/5188 useless extension candidates. Maximal degree in co-relation 23999. Up to 2641 conditions per place. [2022-12-13 11:08:41,493 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 163 selfloop transitions, 246 changer transitions 117/526 dead transitions. [2022-12-13 11:08:41,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 526 transitions, 5987 flow [2022-12-13 11:08:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 11:08:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 11:08:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3514 transitions. [2022-12-13 11:08:41,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3826219512195122 [2022-12-13 11:08:41,496 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3514 transitions. [2022-12-13 11:08:41,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3514 transitions. [2022-12-13 11:08:41,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:41,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3514 transitions. [2022-12-13 11:08:41,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 85.70731707317073) internal successors, (3514), 41 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:41,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 224.0) internal successors, (9408), 42 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:41,505 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 224.0) internal successors, (9408), 42 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:41,505 INFO L175 Difference]: Start difference. First operand has 117 places, 125 transitions, 1634 flow. Second operand 41 states and 3514 transitions. [2022-12-13 11:08:41,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 526 transitions, 5987 flow [2022-12-13 11:08:41,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 526 transitions, 5388 flow, removed 125 selfloop flow, removed 14 redundant places. [2022-12-13 11:08:41,567 INFO L231 Difference]: Finished difference. Result has 153 places, 269 transitions, 3629 flow [2022-12-13 11:08:41,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3629, PETRI_PLACES=153, PETRI_TRANSITIONS=269} [2022-12-13 11:08:41,568 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 134 predicate places. [2022-12-13 11:08:41,568 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 269 transitions, 3629 flow [2022-12-13 11:08:41,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 79.71875) internal successors, (2551), 32 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:41,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:41,569 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:41,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:08:41,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:41,770 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 11:08:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1430824086, now seen corresponding path program 10 times [2022-12-13 11:08:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:41,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172503961] [2022-12-13 11:08:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:41,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:08:41,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:41,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172503961] [2022-12-13 11:08:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172503961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429323500] [2022-12-13 11:08:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:08:41,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:41,868 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:41,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:08:41,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:08:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:08:41,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:08:41,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:08:42,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429323500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:42,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:42,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-12-13 11:08:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73877894] [2022-12-13 11:08:42,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:42,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:08:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:42,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:08:42,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:08:42,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2022-12-13 11:08:42,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 269 transitions, 3629 flow. Second operand has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:42,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:42,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2022-12-13 11:08:42,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:43,438 INFO L130 PetriNetUnfolder]: 5375/9920 cut-off events. [2022-12-13 11:08:43,438 INFO L131 PetriNetUnfolder]: For 58360/58360 co-relation queries the response was YES. [2022-12-13 11:08:43,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50718 conditions, 9920 events. 5375/9920 cut-off events. For 58360/58360 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 79287 event pairs, 1013 based on Foata normal form. 60/9978 useless extension candidates. Maximal degree in co-relation 48936. Up to 5201 conditions per place. [2022-12-13 11:08:43,486 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 168 selfloop transitions, 305 changer transitions 3/476 dead transitions. [2022-12-13 11:08:43,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 476 transitions, 7426 flow [2022-12-13 11:08:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:08:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:08:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 671 transitions. [2022-12-13 11:08:43,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4992559523809524 [2022-12-13 11:08:43,488 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 671 transitions. [2022-12-13 11:08:43,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 671 transitions. [2022-12-13 11:08:43,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:43,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 671 transitions. [2022-12-13 11:08:43,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:43,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:43,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:43,491 INFO L175 Difference]: Start difference. First operand has 153 places, 269 transitions, 3629 flow. Second operand 6 states and 671 transitions. [2022-12-13 11:08:43,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 476 transitions, 7426 flow [2022-12-13 11:08:43,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 476 transitions, 7069 flow, removed 174 selfloop flow, removed 4 redundant places. [2022-12-13 11:08:43,664 INFO L231 Difference]: Finished difference. Result has 158 places, 434 transitions, 7145 flow [2022-12-13 11:08:43,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7145, PETRI_PLACES=158, PETRI_TRANSITIONS=434} [2022-12-13 11:08:43,664 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 139 predicate places. [2022-12-13 11:08:43,664 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 434 transitions, 7145 flow [2022-12-13 11:08:43,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:43,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:43,664 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:43,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:08:43,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:08:43,866 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 11:08:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash -565011148, now seen corresponding path program 11 times [2022-12-13 11:08:43,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:43,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113160601] [2022-12-13 11:08:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:44,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113160601] [2022-12-13 11:08:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113160601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209938131] [2022-12-13 11:08:44,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:08:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:44,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:44,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:44,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:08:44,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:08:44,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 11:08:44,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:44,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:08:44,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:08:44,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:08:44,942 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 11:08:44,943 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 22 treesize of output 10 [2022-12-13 11:08:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:44,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:45,609 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~size~0_173 Int) (v_ArrVal_441 (Array Int Int)) (v_ArrVal_442 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_442) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (not (< 0 v_~size~0_173)) (= 5 (select .cse0 (+ .cse1 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= (select .cse0 (+ .cse1 8 (* v_~size~0_173 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5)) (< (+ c_~size~0 1) v_~size~0_173)))) is different from false [2022-12-13 11:08:45,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:08:45,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-12-13 11:08:45,631 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:08:45,631 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 160 treesize of output 144 [2022-12-13 11:08:45,640 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:08:45,640 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 139 treesize of output 105 [2022-12-13 11:08:45,649 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:08:45,649 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 84 treesize of output 67 [2022-12-13 11:08:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-12-13 11:08:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209938131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:45,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:45,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 37 [2022-12-13 11:08:45,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268320475] [2022-12-13 11:08:45,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 11:08:45,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 11:08:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1115, Unknown=6, NotChecked=72, Total=1482 [2022-12-13 11:08:45,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 224 [2022-12-13 11:08:45,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 434 transitions, 7145 flow. Second operand has 39 states, 39 states have (on average 75.48717948717949) internal successors, (2944), 39 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:45,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:45,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 224 [2022-12-13 11:08:45,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:02,739 INFO L130 PetriNetUnfolder]: 11073/20351 cut-off events. [2022-12-13 11:09:02,739 INFO L131 PetriNetUnfolder]: For 145351/145351 co-relation queries the response was YES. [2022-12-13 11:09:02,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111817 conditions, 20351 events. 11073/20351 cut-off events. For 145351/145351 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 179714 event pairs, 894 based on Foata normal form. 28/20378 useless extension candidates. Maximal degree in co-relation 107590. Up to 10963 conditions per place. [2022-12-13 11:09:02,886 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 330 selfloop transitions, 829 changer transitions 261/1420 dead transitions. [2022-12-13 11:09:02,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1420 transitions, 19974 flow [2022-12-13 11:09:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 11:09:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-12-13 11:09:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 6903 transitions. [2022-12-13 11:09:02,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3668686224489796 [2022-12-13 11:09:02,896 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 6903 transitions. [2022-12-13 11:09:02,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 6903 transitions. [2022-12-13 11:09:02,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:02,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 6903 transitions. [2022-12-13 11:09:02,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 82.17857142857143) internal successors, (6903), 84 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 224.0) internal successors, (19040), 85 states have internal predecessors, (19040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,924 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 224.0) internal successors, (19040), 85 states have internal predecessors, (19040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,924 INFO L175 Difference]: Start difference. First operand has 158 places, 434 transitions, 7145 flow. Second operand 84 states and 6903 transitions. [2022-12-13 11:09:02,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1420 transitions, 19974 flow [2022-12-13 11:09:03,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1420 transitions, 19514 flow, removed 230 selfloop flow, removed 0 redundant places. [2022-12-13 11:09:03,664 INFO L231 Difference]: Finished difference. Result has 260 places, 868 transitions, 16013 flow [2022-12-13 11:09:03,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=6919, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=16013, PETRI_PLACES=260, PETRI_TRANSITIONS=868} [2022-12-13 11:09:03,664 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 241 predicate places. [2022-12-13 11:09:03,664 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 868 transitions, 16013 flow [2022-12-13 11:09:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 75.48717948717949) internal successors, (2944), 39 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:03,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:03,665 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:03,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 11:09:03,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 11:09:03,866 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 11:09:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1801519488, now seen corresponding path program 12 times [2022-12-13 11:09:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:03,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377511332] [2022-12-13 11:09:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:04,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377511332] [2022-12-13 11:09:04,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377511332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999797898] [2022-12-13 11:09:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:09:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:04,299 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:04,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:09:04,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:09:04,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 11:09:04,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:04,774 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 15 treesize of output 7 [2022-12-13 11:09:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:04,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:04,883 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:09:04,884 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 28 treesize of output 13 [2022-12-13 11:09:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:04,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999797898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:04,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:04,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-12-13 11:09:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035257607] [2022-12-13 11:09:04,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:04,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 11:09:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 11:09:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:09:05,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2022-12-13 11:09:05,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 868 transitions, 16013 flow. Second operand has 33 states, 33 states have (on average 91.6969696969697) internal successors, (3026), 33 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:05,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:05,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2022-12-13 11:09:05,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:12,236 INFO L130 PetriNetUnfolder]: 11313/20766 cut-off events. [2022-12-13 11:09:12,237 INFO L131 PetriNetUnfolder]: For 223631/223631 co-relation queries the response was YES. [2022-12-13 11:09:12,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124008 conditions, 20766 events. 11313/20766 cut-off events. For 223631/223631 co-relation queries the response was YES. Maximal size of possible extension queue 1350. Compared 183619 event pairs, 1296 based on Foata normal form. 22/20787 useless extension candidates. Maximal degree in co-relation 121745. Up to 11203 conditions per place. [2022-12-13 11:09:12,384 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 246 selfloop transitions, 845 changer transitions 174/1265 dead transitions. [2022-12-13 11:09:12,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1265 transitions, 21550 flow [2022-12-13 11:09:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 11:09:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 11:09:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 5199 transitions. [2022-12-13 11:09:12,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4379211590296496 [2022-12-13 11:09:12,391 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 5199 transitions. [2022-12-13 11:09:12,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 5199 transitions. [2022-12-13 11:09:12,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:12,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 5199 transitions. [2022-12-13 11:09:12,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 98.09433962264151) internal successors, (5199), 53 states have internal predecessors, (5199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 224.0) internal successors, (12096), 54 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,410 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 224.0) internal successors, (12096), 54 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,410 INFO L175 Difference]: Start difference. First operand has 260 places, 868 transitions, 16013 flow. Second operand 53 states and 5199 transitions. [2022-12-13 11:09:12,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1265 transitions, 21550 flow [2022-12-13 11:09:14,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1265 transitions, 19149 flow, removed 653 selfloop flow, removed 20 redundant places. [2022-12-13 11:09:14,138 INFO L231 Difference]: Finished difference. Result has 300 places, 894 transitions, 16905 flow [2022-12-13 11:09:14,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=819, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=16905, PETRI_PLACES=300, PETRI_TRANSITIONS=894} [2022-12-13 11:09:14,139 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 281 predicate places. [2022-12-13 11:09:14,139 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 894 transitions, 16905 flow [2022-12-13 11:09:14,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.6969696969697) internal successors, (3026), 33 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:14,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:14,140 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:14,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 11:09:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:09:14,341 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 11:09:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1198179900, now seen corresponding path program 13 times [2022-12-13 11:09:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:14,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903418931] [2022-12-13 11:09:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:14,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:15,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903418931] [2022-12-13 11:09:15,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903418931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18087741] [2022-12-13 11:09:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:09:15,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:15,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:15,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:09:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:15,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 11:09:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:15,459 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 19 treesize of output 21 [2022-12-13 11:09:15,577 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 19 treesize of output 7 [2022-12-13 11:09:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:15,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:15,686 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_527 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_527) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2022-12-13 11:09:15,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:09:15,696 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 47 treesize of output 37 [2022-12-13 11:09:15,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-13 11:09:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2022-12-13 11:09:15,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18087741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:15,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:15,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 38 [2022-12-13 11:09:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148457328] [2022-12-13 11:09:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:09:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:09:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1380, Unknown=1, NotChecked=74, Total=1560 [2022-12-13 11:09:15,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 224 [2022-12-13 11:09:15,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 894 transitions, 16905 flow. Second operand has 40 states, 40 states have (on average 71.575) internal successors, (2863), 40 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:15,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:15,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 224 [2022-12-13 11:09:15,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:25,647 INFO L130 PetriNetUnfolder]: 15675/28257 cut-off events. [2022-12-13 11:09:25,647 INFO L131 PetriNetUnfolder]: For 350628/350628 co-relation queries the response was YES. [2022-12-13 11:09:25,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169762 conditions, 28257 events. 15675/28257 cut-off events. For 350628/350628 co-relation queries the response was YES. Maximal size of possible extension queue 1724. Compared 255044 event pairs, 1649 based on Foata normal form. 1/28257 useless extension candidates. Maximal degree in co-relation 166608. Up to 15565 conditions per place. [2022-12-13 11:09:25,868 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 142 selfloop transitions, 1163 changer transitions 91/1396 dead transitions. [2022-12-13 11:09:25,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1396 transitions, 26906 flow [2022-12-13 11:09:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 11:09:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 11:09:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2621 transitions. [2022-12-13 11:09:25,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3441439075630252 [2022-12-13 11:09:25,871 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2621 transitions. [2022-12-13 11:09:25,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2621 transitions. [2022-12-13 11:09:25,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:25,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2621 transitions. [2022-12-13 11:09:25,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 77.08823529411765) internal successors, (2621), 34 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:25,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:25,878 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:25,878 INFO L175 Difference]: Start difference. First operand has 300 places, 894 transitions, 16905 flow. Second operand 34 states and 2621 transitions. [2022-12-13 11:09:25,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1396 transitions, 26906 flow [2022-12-13 11:09:28,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1396 transitions, 25706 flow, removed 84 selfloop flow, removed 41 redundant places. [2022-12-13 11:09:28,585 INFO L231 Difference]: Finished difference. Result has 295 places, 1202 transitions, 24212 flow [2022-12-13 11:09:28,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=15897, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=24212, PETRI_PLACES=295, PETRI_TRANSITIONS=1202} [2022-12-13 11:09:28,586 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 276 predicate places. [2022-12-13 11:09:28,586 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1202 transitions, 24212 flow [2022-12-13 11:09:28,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.575) internal successors, (2863), 40 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:28,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:28,586 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:28,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 11:09:28,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:09:28,788 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 11:09:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash 923183583, now seen corresponding path program 14 times [2022-12-13 11:09:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:28,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619061248] [2022-12-13 11:09:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:28,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:28,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619061248] [2022-12-13 11:09:28,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619061248] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630822009] [2022-12-13 11:09:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:09:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:28,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:28,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:09:28,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:09:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:28,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:29,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630822009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:29,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:29,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-12-13 11:09:29,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950640601] [2022-12-13 11:09:29,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:29,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:09:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:09:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:09:29,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2022-12-13 11:09:29,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1202 transitions, 24212 flow. Second operand has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:29,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:29,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2022-12-13 11:09:29,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:42,470 INFO L130 PetriNetUnfolder]: 24105/44301 cut-off events. [2022-12-13 11:09:42,471 INFO L131 PetriNetUnfolder]: For 651189/651189 co-relation queries the response was YES. [2022-12-13 11:09:42,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318231 conditions, 44301 events. 24105/44301 cut-off events. For 651189/651189 co-relation queries the response was YES. Maximal size of possible extension queue 2621. Compared 435483 event pairs, 3920 based on Foata normal form. 54/44355 useless extension candidates. Maximal degree in co-relation 306752. Up to 23947 conditions per place. [2022-12-13 11:09:42,852 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 539 selfloop transitions, 1349 changer transitions 6/1894 dead transitions. [2022-12-13 11:09:42,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1894 transitions, 41532 flow [2022-12-13 11:09:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:09:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:09:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2022-12-13 11:09:42,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 11:09:42,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2022-12-13 11:09:42,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2022-12-13 11:09:42,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:42,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2022-12-13 11:09:42,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:42,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:42,856 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:42,856 INFO L175 Difference]: Start difference. First operand has 295 places, 1202 transitions, 24212 flow. Second operand 7 states and 784 transitions. [2022-12-13 11:09:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1894 transitions, 41532 flow [2022-12-13 11:09:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1894 transitions, 39993 flow, removed 370 selfloop flow, removed 13 redundant places. [2022-12-13 11:09:47,940 INFO L231 Difference]: Finished difference. Result has 292 places, 1839 transitions, 41658 flow [2022-12-13 11:09:47,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=23142, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=41658, PETRI_PLACES=292, PETRI_TRANSITIONS=1839} [2022-12-13 11:09:47,941 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 273 predicate places. [2022-12-13 11:09:47,941 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 1839 transitions, 41658 flow [2022-12-13 11:09:47,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:47,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:47,942 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:47,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 11:09:48,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:09:48,143 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 11:09:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1603948428, now seen corresponding path program 15 times [2022-12-13 11:09:48,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:48,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166498631] [2022-12-13 11:09:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:48,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:09:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166498631] [2022-12-13 11:09:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166498631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528644459] [2022-12-13 11:09:48,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:09:48,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:48,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:48,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:09:48,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:09:48,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:09:48,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:48,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:09:48,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528644459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:48,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:48,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-12-13 11:09:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903989813] [2022-12-13 11:09:48,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:09:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:09:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:09:49,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2022-12-13 11:09:49,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1839 transitions, 41658 flow. Second operand has 31 states, 31 states have (on average 94.61290322580645) internal successors, (2933), 31 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:49,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:49,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2022-12-13 11:09:49,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:59,992 INFO L130 PetriNetUnfolder]: 11733/22159 cut-off events. [2022-12-13 11:09:59,992 INFO L131 PetriNetUnfolder]: For 358828/358828 co-relation queries the response was YES. [2022-12-13 11:10:00,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162384 conditions, 22159 events. 11733/22159 cut-off events. For 358828/358828 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 199119 event pairs, 4086 based on Foata normal form. 421/22580 useless extension candidates. Maximal degree in co-relation 162088. Up to 16119 conditions per place. [2022-12-13 11:10:00,150 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 701 selfloop transitions, 119 changer transitions 449/1269 dead transitions. [2022-12-13 11:10:00,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1269 transitions, 27060 flow [2022-12-13 11:10:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 11:10:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 11:10:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3920 transitions. [2022-12-13 11:10:00,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2022-12-13 11:10:00,154 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3920 transitions. [2022-12-13 11:10:00,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3920 transitions. [2022-12-13 11:10:00,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:00,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3920 transitions. [2022-12-13 11:10:00,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 100.51282051282051) internal successors, (3920), 39 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:00,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 224.0) internal successors, (8960), 40 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:00,164 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 224.0) internal successors, (8960), 40 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:00,164 INFO L175 Difference]: Start difference. First operand has 292 places, 1839 transitions, 41658 flow. Second operand 39 states and 3920 transitions. [2022-12-13 11:10:00,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1269 transitions, 27060 flow [2022-12-13 11:10:04,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1269 transitions, 25136 flow, removed 383 selfloop flow, removed 12 redundant places. [2022-12-13 11:10:04,065 INFO L231 Difference]: Finished difference. Result has 310 places, 810 transitions, 17236 flow [2022-12-13 11:10:04,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=17993, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=17236, PETRI_PLACES=310, PETRI_TRANSITIONS=810} [2022-12-13 11:10:04,066 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 291 predicate places. [2022-12-13 11:10:04,066 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 810 transitions, 17236 flow [2022-12-13 11:10:04,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 94.61290322580645) internal successors, (2933), 31 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:04,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:04,066 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:04,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 11:10:04,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:10:04,268 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 11:10:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:04,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1302675632, now seen corresponding path program 16 times [2022-12-13 11:10:04,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:04,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403020904] [2022-12-13 11:10:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403020904] [2022-12-13 11:10:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403020904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676558179] [2022-12-13 11:10:04,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:10:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:04,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:04,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:10:04,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:10:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 11:10:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:05,182 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 19 treesize of output 7 [2022-12-13 11:10:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:10:05,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:05,330 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:10:05,331 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 28 treesize of output 13 [2022-12-13 11:10:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:10:05,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676558179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:05,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:05,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 38 [2022-12-13 11:10:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828306537] [2022-12-13 11:10:05,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:10:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:10:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 11:10:06,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2022-12-13 11:10:06,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 810 transitions, 17236 flow. Second operand has 40 states, 40 states have (on average 91.675) internal successors, (3667), 40 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:06,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:06,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2022-12-13 11:10:06,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:15,443 INFO L130 PetriNetUnfolder]: 11942/21999 cut-off events. [2022-12-13 11:10:15,443 INFO L131 PetriNetUnfolder]: For 338942/338942 co-relation queries the response was YES. [2022-12-13 11:10:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157669 conditions, 21999 events. 11942/21999 cut-off events. For 338942/338942 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 196112 event pairs, 1199 based on Foata normal form. 11/22010 useless extension candidates. Maximal degree in co-relation 157556. Up to 11396 conditions per place. [2022-12-13 11:10:15,585 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 306 selfloop transitions, 952 changer transitions 250/1508 dead transitions. [2022-12-13 11:10:15,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1508 transitions, 28224 flow [2022-12-13 11:10:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-13 11:10:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-12-13 11:10:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7445 transitions. [2022-12-13 11:10:15,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43732377819548873 [2022-12-13 11:10:15,591 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7445 transitions. [2022-12-13 11:10:15,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7445 transitions. [2022-12-13 11:10:15,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:15,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7445 transitions. [2022-12-13 11:10:15,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 97.96052631578948) internal successors, (7445), 76 states have internal predecessors, (7445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:15,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 224.0) internal successors, (17248), 77 states have internal predecessors, (17248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:15,607 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 224.0) internal successors, (17248), 77 states have internal predecessors, (17248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:15,607 INFO L175 Difference]: Start difference. First operand has 310 places, 810 transitions, 17236 flow. Second operand 76 states and 7445 transitions. [2022-12-13 11:10:15,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1508 transitions, 28224 flow [2022-12-13 11:10:18,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1508 transitions, 26922 flow, removed 256 selfloop flow, removed 21 redundant places. [2022-12-13 11:10:18,480 INFO L231 Difference]: Finished difference. Result has 333 places, 983 transitions, 23003 flow [2022-12-13 11:10:18,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=16263, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=23003, PETRI_PLACES=333, PETRI_TRANSITIONS=983} [2022-12-13 11:10:18,480 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 314 predicate places. [2022-12-13 11:10:18,480 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 983 transitions, 23003 flow [2022-12-13 11:10:18,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 91.675) internal successors, (3667), 40 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:18,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:18,481 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:18,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:10:18,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:18,682 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 11:10:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash 155463130, now seen corresponding path program 17 times [2022-12-13 11:10:18,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:18,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473494081] [2022-12-13 11:10:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:18,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473494081] [2022-12-13 11:10:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473494081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78324484] [2022-12-13 11:10:19,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:10:19,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:19,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:19,334 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:19,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:10:19,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:10:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 11:10:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:19,730 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 19 treesize of output 21 [2022-12-13 11:10:19,874 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 19 treesize of output 7 [2022-12-13 11:10:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:10:19,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:20,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:10:20,101 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 47 treesize of output 37 [2022-12-13 11:10:20,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-13 11:10:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:10:20,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78324484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:20,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:20,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 13] total 46 [2022-12-13 11:10:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362308941] [2022-12-13 11:10:20,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:20,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 11:10:20,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 11:10:20,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2106, Unknown=8, NotChecked=0, Total=2256 [2022-12-13 11:10:20,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 224 [2022-12-13 11:10:20,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 983 transitions, 23003 flow. Second operand has 48 states, 48 states have (on average 79.47916666666667) internal successors, (3815), 48 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:20,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:20,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 224 [2022-12-13 11:10:20,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:29,909 INFO L130 PetriNetUnfolder]: 12454/22927 cut-off events. [2022-12-13 11:10:29,910 INFO L131 PetriNetUnfolder]: For 374932/374932 co-relation queries the response was YES. [2022-12-13 11:10:30,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168370 conditions, 22927 events. 12454/22927 cut-off events. For 374932/374932 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 205010 event pairs, 1257 based on Foata normal form. 1/22928 useless extension candidates. Maximal degree in co-relation 168258. Up to 11908 conditions per place. [2022-12-13 11:10:30,065 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 160 selfloop transitions, 998 changer transitions 106/1264 dead transitions. [2022-12-13 11:10:30,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1264 transitions, 28402 flow [2022-12-13 11:10:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 11:10:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 11:10:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3155 transitions. [2022-12-13 11:10:30,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38067084942084944 [2022-12-13 11:10:30,070 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3155 transitions. [2022-12-13 11:10:30,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3155 transitions. [2022-12-13 11:10:30,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:30,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3155 transitions. [2022-12-13 11:10:30,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 85.27027027027027) internal successors, (3155), 37 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:30,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 224.0) internal successors, (8512), 38 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:30,080 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 224.0) internal successors, (8512), 38 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:30,080 INFO L175 Difference]: Start difference. First operand has 333 places, 983 transitions, 23003 flow. Second operand 37 states and 3155 transitions. [2022-12-13 11:10:30,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1264 transitions, 28402 flow [2022-12-13 11:10:32,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1264 transitions, 25754 flow, removed 269 selfloop flow, removed 29 redundant places. [2022-12-13 11:10:32,980 INFO L231 Difference]: Finished difference. Result has 341 places, 1030 transitions, 23312 flow [2022-12-13 11:10:32,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=20505, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=951, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23312, PETRI_PLACES=341, PETRI_TRANSITIONS=1030} [2022-12-13 11:10:32,981 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 322 predicate places. [2022-12-13 11:10:32,981 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1030 transitions, 23312 flow [2022-12-13 11:10:32,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 79.47916666666667) internal successors, (3815), 48 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:32,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:32,982 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:32,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 11:10:33,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:33,183 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 11:10:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash -408264003, now seen corresponding path program 18 times [2022-12-13 11:10:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592198971] [2022-12-13 11:10:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:33,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:10:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592198971] [2022-12-13 11:10:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592198971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937342660] [2022-12-13 11:10:33,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:10:33,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:33,324 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:33,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:10:33,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 11:10:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:10:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:10:33,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:10:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937342660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:33,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:33,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2022-12-13 11:10:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178618177] [2022-12-13 11:10:33,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 11:10:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 11:10:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:10:34,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2022-12-13 11:10:34,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1030 transitions, 23312 flow. Second operand has 33 states, 33 states have (on average 95.0) internal successors, (3135), 33 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:34,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:34,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2022-12-13 11:10:34,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:56,240 INFO L130 PetriNetUnfolder]: 35931/67384 cut-off events. [2022-12-13 11:10:56,240 INFO L131 PetriNetUnfolder]: For 1055695/1055695 co-relation queries the response was YES. [2022-12-13 11:10:56,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486875 conditions, 67384 events. 35931/67384 cut-off events. For 1055695/1055695 co-relation queries the response was YES. Maximal size of possible extension queue 4115. Compared 715159 event pairs, 5284 based on Foata normal form. 1744/69128 useless extension candidates. Maximal degree in co-relation 478026. Up to 35685 conditions per place. [2022-12-13 11:10:56,831 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 426 selfloop transitions, 1172 changer transitions 1435/3033 dead transitions. [2022-12-13 11:10:56,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 3033 transitions, 73082 flow [2022-12-13 11:10:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:10:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 11:10:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3519 transitions. [2022-12-13 11:10:56,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4488520408163265 [2022-12-13 11:10:56,835 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3519 transitions. [2022-12-13 11:10:56,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3519 transitions. [2022-12-13 11:10:56,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:56,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3519 transitions. [2022-12-13 11:10:56,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 100.54285714285714) internal successors, (3519), 35 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:56,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 224.0) internal successors, (8064), 36 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:56,845 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 224.0) internal successors, (8064), 36 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:56,845 INFO L175 Difference]: Start difference. First operand has 341 places, 1030 transitions, 23312 flow. Second operand 35 states and 3519 transitions. [2022-12-13 11:10:56,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 3033 transitions, 73082 flow [2022-12-13 11:11:15,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 3033 transitions, 72306 flow, removed 70 selfloop flow, removed 15 redundant places. [2022-12-13 11:11:16,022 INFO L231 Difference]: Finished difference. Result has 370 places, 1539 transitions, 40429 flow [2022-12-13 11:11:16,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=23024, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=40429, PETRI_PLACES=370, PETRI_TRANSITIONS=1539} [2022-12-13 11:11:16,023 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 351 predicate places. [2022-12-13 11:11:16,023 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1539 transitions, 40429 flow [2022-12-13 11:11:16,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 95.0) internal successors, (3135), 33 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:16,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:11:16,024 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:11:16,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 11:11:16,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 11:11:16,225 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 11:11:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:11:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1699089758, now seen corresponding path program 19 times [2022-12-13 11:11:16,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:11:16,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107865421] [2022-12-13 11:11:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:11:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:11:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:11:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:11:16,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:11:16,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107865421] [2022-12-13 11:11:16,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107865421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:11:16,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848499370] [2022-12-13 11:11:16,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:11:16,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:11:16,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:11:16,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:11:16,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:11:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:11:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 11:11:16,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:11:17,115 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 23 treesize of output 7 [2022-12-13 11:11:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:11:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:11:17,250 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:11:17,250 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 28 treesize of output 13 [2022-12-13 11:11:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:11:17,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848499370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:11:17,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:11:17,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2022-12-13 11:11:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563391800] [2022-12-13 11:11:17,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:11:17,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 11:11:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:11:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 11:11:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 11:11:18,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 224 [2022-12-13 11:11:18,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1539 transitions, 40429 flow. Second operand has 39 states, 39 states have (on average 93.51282051282051) internal successors, (3647), 39 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:18,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:11:18,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 224 [2022-12-13 11:11:18,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:11:44,567 INFO L130 PetriNetUnfolder]: 25748/47040 cut-off events. [2022-12-13 11:11:44,567 INFO L131 PetriNetUnfolder]: For 909510/909510 co-relation queries the response was YES. [2022-12-13 11:11:44,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373754 conditions, 47040 events. 25748/47040 cut-off events. For 909510/909510 co-relation queries the response was YES. Maximal size of possible extension queue 2696. Compared 459362 event pairs, 2117 based on Foata normal form. 12/47052 useless extension candidates. Maximal degree in co-relation 373625. Up to 25158 conditions per place. [2022-12-13 11:11:45,022 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 586 selfloop transitions, 1930 changer transitions 668/3184 dead transitions. [2022-12-13 11:11:45,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 3184 transitions, 67649 flow [2022-12-13 11:11:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-12-13 11:11:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2022-12-13 11:11:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 17740 transitions. [2022-12-13 11:11:45,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474374495560936 [2022-12-13 11:11:45,043 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 17740 transitions. [2022-12-13 11:11:45,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 17740 transitions. [2022-12-13 11:11:45,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:11:45,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 17740 transitions. [2022-12-13 11:11:45,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 100.22598870056497) internal successors, (17740), 177 states have internal predecessors, (17740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:45,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 224.0) internal successors, (39872), 178 states have internal predecessors, (39872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:45,096 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 224.0) internal successors, (39872), 178 states have internal predecessors, (39872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:45,096 INFO L175 Difference]: Start difference. First operand has 370 places, 1539 transitions, 40429 flow. Second operand 177 states and 17740 transitions. [2022-12-13 11:11:45,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 3184 transitions, 67649 flow [2022-12-13 11:11:55,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 3184 transitions, 63817 flow, removed 1911 selfloop flow, removed 11 redundant places. [2022-12-13 11:11:55,740 INFO L231 Difference]: Finished difference. Result has 527 places, 1968 transitions, 54352 flow [2022-12-13 11:11:55,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37893, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=54352, PETRI_PLACES=527, PETRI_TRANSITIONS=1968} [2022-12-13 11:11:55,741 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 508 predicate places. [2022-12-13 11:11:55,741 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1968 transitions, 54352 flow [2022-12-13 11:11:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 93.51282051282051) internal successors, (3647), 39 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:55,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:11:55,741 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:11:55,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 11:11:55,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 11:11:55,942 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 11:11:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:11:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -910156236, now seen corresponding path program 20 times [2022-12-13 11:11:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:11:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044680031] [2022-12-13 11:11:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:11:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:11:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:11:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:11:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:11:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044680031] [2022-12-13 11:11:56,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044680031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:11:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810616840] [2022-12-13 11:11:56,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:11:56,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:11:56,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:11:56,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:11:56,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:11:56,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:11:56,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:11:56,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 11:11:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:11:56,807 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 23 treesize of output 7 [2022-12-13 11:11:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:11:56,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:11:56,970 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:11:56,970 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 28 treesize of output 13 [2022-12-13 11:11:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:11:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810616840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:11:57,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:11:57,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2022-12-13 11:11:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824980519] [2022-12-13 11:11:57,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:11:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:11:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:11:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:11:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 11:11:57,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 224 [2022-12-13 11:11:57,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1968 transitions, 54352 flow. Second operand has 40 states, 40 states have (on average 93.675) internal successors, (3747), 40 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:57,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:11:57,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 224 [2022-12-13 11:11:57,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:12:26,575 INFO L130 PetriNetUnfolder]: 25888/47294 cut-off events. [2022-12-13 11:12:26,575 INFO L131 PetriNetUnfolder]: For 1002591/1002591 co-relation queries the response was YES. [2022-12-13 11:12:26,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377476 conditions, 47294 events. 25888/47294 cut-off events. For 1002591/1002591 co-relation queries the response was YES. Maximal size of possible extension queue 2712. Compared 461686 event pairs, 2071 based on Foata normal form. 1/47295 useless extension candidates. Maximal degree in co-relation 377349. Up to 25287 conditions per place. [2022-12-13 11:12:27,062 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 406 selfloop transitions, 1939 changer transitions 346/2691 dead transitions. [2022-12-13 11:12:27,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 2691 transitions, 65847 flow [2022-12-13 11:12:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 11:12:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-12-13 11:12:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9730 transitions. [2022-12-13 11:12:27,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4478092783505155 [2022-12-13 11:12:27,070 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9730 transitions. [2022-12-13 11:12:27,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9730 transitions. [2022-12-13 11:12:27,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:12:27,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9730 transitions. [2022-12-13 11:12:27,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 100.30927835051547) internal successors, (9730), 97 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:27,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 224.0) internal successors, (21952), 98 states have internal predecessors, (21952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:27,092 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 224.0) internal successors, (21952), 98 states have internal predecessors, (21952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:27,093 INFO L175 Difference]: Start difference. First operand has 527 places, 1968 transitions, 54352 flow. Second operand 97 states and 9730 transitions. [2022-12-13 11:12:27,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 2691 transitions, 65847 flow [2022-12-13 11:12:40,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 2691 transitions, 60389 flow, removed 588 selfloop flow, removed 32 redundant places. [2022-12-13 11:12:40,321 INFO L231 Difference]: Finished difference. Result has 597 places, 1977 transitions, 53019 flow [2022-12-13 11:12:40,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=48894, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1930, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=53019, PETRI_PLACES=597, PETRI_TRANSITIONS=1977} [2022-12-13 11:12:40,322 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 578 predicate places. [2022-12-13 11:12:40,322 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1977 transitions, 53019 flow [2022-12-13 11:12:40,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 93.675) internal successors, (3747), 40 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:40,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:12:40,322 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:12:40,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 11:12:40,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 11:12:40,523 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 11:12:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:12:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1594945404, now seen corresponding path program 21 times [2022-12-13 11:12:40,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:12:40,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73760403] [2022-12-13 11:12:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:12:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:12:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:12:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:12:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:12:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73760403] [2022-12-13 11:12:41,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73760403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:12:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73113851] [2022-12-13 11:12:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:12:41,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:12:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:12:41,077 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:12:41,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:12:41,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:12:41,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:12:41,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 11:12:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:12:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:12:41,663 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 21 treesize of output 23 [2022-12-13 11:12:42,246 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-12-13 11:12:42,247 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 10 [2022-12-13 11:12:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:12:42,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:12:42,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:12:42,648 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 45 treesize of output 42 [2022-12-13 11:12:42,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-13 11:12:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:12:43,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73113851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:12:43,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:12:43,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2022-12-13 11:12:43,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735020684] [2022-12-13 11:12:43,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:12:43,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 11:12:43,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:12:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 11:12:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 11:12:45,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:12:48,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 224 [2022-12-13 11:12:48,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1977 transitions, 53019 flow. Second operand has 47 states, 47 states have (on average 78.51063829787235) internal successors, (3690), 47 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:48,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:12:48,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 224 [2022-12-13 11:12:48,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:12:57,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:03,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:04,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:06,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:13,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:15,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:17,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:18,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:24,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:26,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:31,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:33,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:36,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:38,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:58,600 INFO L130 PetriNetUnfolder]: 85085/155517 cut-off events. [2022-12-13 11:14:58,600 INFO L131 PetriNetUnfolder]: For 3103639/3103639 co-relation queries the response was YES. [2022-12-13 11:15:00,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240520 conditions, 155517 events. 85085/155517 cut-off events. For 3103639/3103639 co-relation queries the response was YES. Maximal size of possible extension queue 8191. Compared 1756521 event pairs, 16465 based on Foata normal form. 2/155519 useless extension candidates. Maximal degree in co-relation 1239216. Up to 83341 conditions per place. [2022-12-13 11:15:00,509 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 882 selfloop transitions, 1476 changer transitions 4807/7165 dead transitions. [2022-12-13 11:15:00,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 7165 transitions, 201659 flow [2022-12-13 11:15:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-12-13 11:15:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-12-13 11:15:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 7789 transitions. [2022-12-13 11:15:00,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37796001552795033 [2022-12-13 11:15:00,516 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 7789 transitions. [2022-12-13 11:15:00,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 7789 transitions. [2022-12-13 11:15:00,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:15:00,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 7789 transitions. [2022-12-13 11:15:00,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 84.66304347826087) internal successors, (7789), 92 states have internal predecessors, (7789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:00,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 224.0) internal successors, (20832), 93 states have internal predecessors, (20832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:00,532 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 224.0) internal successors, (20832), 93 states have internal predecessors, (20832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:00,532 INFO L175 Difference]: Start difference. First operand has 597 places, 1977 transitions, 53019 flow. Second operand 92 states and 7789 transitions. [2022-12-13 11:15:00,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 7165 transitions, 201659 flow [2022-12-13 11:18:00,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 7165 transitions, 191342 flow, removed 603 selfloop flow, removed 69 redundant places. [2022-12-13 11:18:00,590 INFO L231 Difference]: Finished difference. Result has 636 places, 2247 transitions, 63467 flow [2022-12-13 11:18:00,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=49974, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=63467, PETRI_PLACES=636, PETRI_TRANSITIONS=2247} [2022-12-13 11:18:00,591 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 617 predicate places. [2022-12-13 11:18:00,591 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 2247 transitions, 63467 flow [2022-12-13 11:18:00,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 78.51063829787235) internal successors, (3690), 47 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:00,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:18:00,592 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:18:00,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 11:18:00,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 11:18:00,793 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 11:18:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:18:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1508104410, now seen corresponding path program 22 times [2022-12-13 11:18:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:18:00,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764374350] [2022-12-13 11:18:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:18:00,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:18:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:18:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 11:18:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:18:00,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764374350] [2022-12-13 11:18:00,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764374350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:18:00,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663151028] [2022-12-13 11:18:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:18:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:18:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:18:00,948 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:18:00,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:18:01,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:18:01,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:18:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:18:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:18:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 11:18:01,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:18:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 11:18:01,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663151028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:18:01,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:18:01,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-12-13 11:18:01,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657397835] [2022-12-13 11:18:01,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:18:01,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:18:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:18:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:18:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:18:01,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2022-12-13 11:18:01,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 2247 transitions, 63467 flow. Second operand has 10 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:01,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:18:01,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2022-12-13 11:18:01,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:18:49,422 INFO L130 PetriNetUnfolder]: 44752/81627 cut-off events. [2022-12-13 11:18:49,422 INFO L131 PetriNetUnfolder]: For 1972726/1972726 co-relation queries the response was YES. [2022-12-13 11:18:50,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676991 conditions, 81627 events. 44752/81627 cut-off events. For 1972726/1972726 co-relation queries the response was YES. Maximal size of possible extension queue 4505. Compared 852549 event pairs, 5443 based on Foata normal form. 24/81651 useless extension candidates. Maximal degree in co-relation 676829. Up to 44110 conditions per place. [2022-12-13 11:18:50,531 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 780 selfloop transitions, 2574 changer transitions 6/3360 dead transitions. [2022-12-13 11:18:50,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 3360 transitions, 104117 flow [2022-12-13 11:18:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:18:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:18:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1010 transitions. [2022-12-13 11:18:50,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5009920634920635 [2022-12-13 11:18:50,533 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1010 transitions. [2022-12-13 11:18:50,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1010 transitions. [2022-12-13 11:18:50,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:18:50,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1010 transitions. [2022-12-13 11:18:50,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.22222222222223) internal successors, (1010), 9 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:50,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:50,535 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:50,535 INFO L175 Difference]: Start difference. First operand has 636 places, 2247 transitions, 63467 flow. Second operand 9 states and 1010 transitions. [2022-12-13 11:18:50,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 3360 transitions, 104117 flow [2022-12-13 11:19:29,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 3360 transitions, 98132 flow, removed 2743 selfloop flow, removed 31 redundant places. [2022-12-13 11:19:30,036 INFO L231 Difference]: Finished difference. Result has 576 places, 3285 transitions, 99875 flow [2022-12-13 11:19:30,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=60126, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=99875, PETRI_PLACES=576, PETRI_TRANSITIONS=3285} [2022-12-13 11:19:30,038 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 557 predicate places. [2022-12-13 11:19:30,038 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 3285 transitions, 99875 flow [2022-12-13 11:19:30,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:19:30,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:19:30,038 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:19:30,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:19:30,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:19:30,239 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 11:19:30,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:19:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1210475412, now seen corresponding path program 23 times [2022-12-13 11:19:30,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:19:30,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900000206] [2022-12-13 11:19:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:19:30,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:19:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:19:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:19:30,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:19:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900000206] [2022-12-13 11:19:30,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900000206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:19:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891614167] [2022-12-13 11:19:30,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:19:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:19:30,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:19:30,993 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:19:30,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5174703e-f0c4-4a45-a690-a6793c76a38d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:19:31,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 11:19:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:19:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 11:19:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:19:31,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:19:31,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:19:31,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:19:31,885 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 19 treesize of output 7 [2022-12-13 11:19:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:19:31,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:19:32,766 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1009 (Array Int Int)) (v_ArrVal_1008 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1008) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1009) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (= 5 (select .cse0 (+ .cse1 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= (select .cse0 (+ (* c_~size~0 4) .cse1 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5))))) is different from false [2022-12-13 11:19:32,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:19:32,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-12-13 11:19:32,778 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 11:19:32,778 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 160 treesize of output 144 [2022-12-13 11:19:32,785 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:19:32,785 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 139 treesize of output 105 [2022-12-13 11:19:32,791 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:19:32,791 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 84 treesize of output 67 [2022-12-13 11:19:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 7 not checked. [2022-12-13 11:19:32,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891614167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:19:32,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:19:32,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 18] total 63 [2022-12-13 11:19:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748353755] [2022-12-13 11:19:32,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:19:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 11:19:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:19:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 11:19:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3774, Unknown=4, NotChecked=124, Total=4160 [2022-12-13 11:19:32,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 224 [2022-12-13 11:19:32,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 3285 transitions, 99875 flow. Second operand has 65 states, 65 states have (on average 75.23076923076923) internal successors, (4890), 65 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:19:32,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:19:32,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 224 [2022-12-13 11:19:32,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:21:14,363 INFO L130 PetriNetUnfolder]: 55222/100643 cut-off events. [2022-12-13 11:21:14,363 INFO L131 PetriNetUnfolder]: For 2279790/2279790 co-relation queries the response was YES. [2022-12-13 11:21:15,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868917 conditions, 100643 events. 55222/100643 cut-off events. For 2279790/2279790 co-relation queries the response was YES. Maximal size of possible extension queue 5676. Compared 1084397 event pairs, 16634 based on Foata normal form. 15/100658 useless extension candidates. Maximal degree in co-relation 868775. Up to 60019 conditions per place. [2022-12-13 11:21:15,714 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 3655 selfloop transitions, 1715 changer transitions 857/6227 dead transitions. [2022-12-13 11:21:15,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 6227 transitions, 161052 flow [2022-12-13 11:21:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2022-12-13 11:21:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2022-12-13 11:21:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 22053 transitions. [2022-12-13 11:21:15,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36598844928305896 [2022-12-13 11:21:15,730 INFO L72 ComplementDD]: Start complementDD. Operand 269 states and 22053 transitions. [2022-12-13 11:21:15,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 269 states and 22053 transitions. [2022-12-13 11:21:15,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:21:15,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 269 states and 22053 transitions. [2022-12-13 11:21:15,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 270 states, 269 states have (on average 81.9814126394052) internal successors, (22053), 269 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:15,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 270 states, 270 states have (on average 224.0) internal successors, (60480), 270 states have internal predecessors, (60480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:15,780 INFO L81 ComplementDD]: Finished complementDD. Result has 270 states, 270 states have (on average 224.0) internal successors, (60480), 270 states have internal predecessors, (60480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:15,780 INFO L175 Difference]: Start difference. First operand has 576 places, 3285 transitions, 99875 flow. Second operand 269 states and 22053 transitions. [2022-12-13 11:21:15,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 6227 transitions, 161052 flow