./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:21:34,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:21:34,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:21:34,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:21:34,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:21:34,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:21:34,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:21:34,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:21:34,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:21:34,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:21:34,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:21:34,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:21:34,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:21:34,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:21:34,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:21:34,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:21:34,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:21:34,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:21:34,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:21:34,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:21:34,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:21:34,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:21:34,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:21:34,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:21:34,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:21:34,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:21:34,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:21:34,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:21:34,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:21:34,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:21:34,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:21:34,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:21:34,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:21:34,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:21:34,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:21:34,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:21:34,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:21:34,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:21:34,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:21:34,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:21:34,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:21:34,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:21:34,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:21:34,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:21:34,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:21:34,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:21:34,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:21:34,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:21:34,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:21:34,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:21:34,158 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:21:34,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:21:34,158 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:21:34,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:21:34,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:21:34,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:21:34,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:21:34,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:21:34,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:21:34,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:21:34,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:21:34,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:21:34,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:21:34,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:21:34,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:21:34,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:21:34,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:21:34,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:21:34,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:21:34,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:21:34,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:21:34,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:21:34,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:21:34,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:21:34,163 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:21:34,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:21:34,163 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_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-11-25 18:21:34,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:21:34,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:21:34,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:21:34,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:21:34,539 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:21:34,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-11-25 18:21:37,749 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:21:37,954 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:21:37,955 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-11-25 18:21:37,962 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/data/ca27261d4/45753f5f5da34117b3ed8938a6f863b7/FLAGe1c6087e6 [2022-11-25 18:21:37,980 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/data/ca27261d4/45753f5f5da34117b3ed8938a6f863b7 [2022-11-25 18:21:37,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:21:37,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:21:37,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:21:37,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:21:37,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:21:37,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:37" (1/1) ... [2022-11-25 18:21:37,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e6f362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:37, skipping insertion in model container [2022-11-25 18:21:37,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:37" (1/1) ... [2022-11-25 18:21:38,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:21:38,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:21:38,268 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:21:38,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:21:38,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:21:38,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:21:38,286 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:21:38,288 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:21:38,309 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_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-11-25 18:21:38,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:21:38,332 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:21:38,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:21:38,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:21:38,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:21:38,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:21:38,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:21:38,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:21:38,360 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_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-11-25 18:21:38,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:21:38,380 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:21:38,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38 WrapperNode [2022-11-25 18:21:38,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:21:38,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:21:38,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:21:38,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:21:38,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,435 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-11-25 18:21:38,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:21:38,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:21:38,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:21:38,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:21:38,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,471 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:21:38,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:21:38,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:21:38,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:21:38,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (1/1) ... [2022-11-25 18:21:38,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:21:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:38,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:38,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:21:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:21:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:21:38,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:21:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:21:38,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:21:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:21:38,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:21:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:21:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:21:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:21:38,552 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:21:38,656 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:21:38,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:21:39,045 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:21:39,120 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:21:39,121 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:21:39,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:39 BoogieIcfgContainer [2022-11-25 18:21:39,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:21:39,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:21:39,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:21:39,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:21:39,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:21:37" (1/3) ... [2022-11-25 18:21:39,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d869e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:21:39, skipping insertion in model container [2022-11-25 18:21:39,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:38" (2/3) ... [2022-11-25 18:21:39,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d869e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:21:39, skipping insertion in model container [2022-11-25 18:21:39,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:39" (3/3) ... [2022-11-25 18:21:39,134 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2022-11-25 18:21:39,144 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:21:39,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:21:39,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:21:39,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:21:39,285 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:21:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 154 transitions, 332 flow [2022-11-25 18:21:39,418 INFO L130 PetriNetUnfolder]: 12/151 cut-off events. [2022-11-25 18:21:39,418 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:21:39,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 12/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2022-11-25 18:21:39,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 154 transitions, 332 flow [2022-11-25 18:21:39,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 140 transitions, 298 flow [2022-11-25 18:21:39,434 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:21:39,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 140 transitions, 298 flow [2022-11-25 18:21:39,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 140 transitions, 298 flow [2022-11-25 18:21:39,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 140 transitions, 298 flow [2022-11-25 18:21:39,508 INFO L130 PetriNetUnfolder]: 12/140 cut-off events. [2022-11-25 18:21:39,517 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:21:39,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 140 events. 12/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2022-11-25 18:21:39,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-11-25 18:21:47,357 INFO L134 LiptonReduction]: Checked pairs total: 1470 [2022-11-25 18:21:47,357 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-11-25 18:21:47,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:21:47,384 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;@7b514b4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:21:47,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:21:47,423 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-11-25 18:21:47,423 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:21:47,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:47,424 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:47,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:21:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1298831951, now seen corresponding path program 1 times [2022-11-25 18:21:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:47,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488089801] [2022-11-25 18:21:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:48,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:48,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488089801] [2022-11-25 18:21:48,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488089801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:21:48,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:21:48,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:21:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730370316] [2022-11-25 18:21:48,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:48,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:21:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:21:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:21:48,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 291 [2022-11-25 18:21:48,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:48,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:48,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 291 [2022-11-25 18:21:48,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:48,891 INFO L130 PetriNetUnfolder]: 269/376 cut-off events. [2022-11-25 18:21:48,891 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 18:21:48,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 376 events. 269/376 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1096 event pairs, 117 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 593. Up to 367 conditions per place. [2022-11-25 18:21:48,897 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-11-25 18:21:48,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2022-11-25 18:21:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:21:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:21:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2022-11-25 18:21:48,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46964490263459335 [2022-11-25 18:21:48,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2022-11-25 18:21:48,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2022-11-25 18:21:48,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:48,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2022-11-25 18:21:48,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:48,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:48,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:48,942 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 410 transitions. [2022-11-25 18:21:48,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2022-11-25 18:21:48,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:21:48,949 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-11-25 18:21:48,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-11-25 18:21:48,955 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-25 18:21:48,956 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-11-25 18:21:48,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:48,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:48,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:48,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:21:48,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:21:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1692125764, now seen corresponding path program 1 times [2022-11-25 18:21:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858447864] [2022-11-25 18:21:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:49,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858447864] [2022-11-25 18:21:49,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858447864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:49,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363345684] [2022-11-25 18:21:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:49,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:49,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:49,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:49,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:21:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:49,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:21:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:49,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:49,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363345684] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:49,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:21:49,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-25 18:21:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312286603] [2022-11-25 18:21:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:21:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:21:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:21:49,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 291 [2022-11-25 18:21:49,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:49,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:49,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 291 [2022-11-25 18:21:49,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:49,833 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2022-11-25 18:21:49,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:21:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1420 event pairs, 49 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2022-11-25 18:21:49,839 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2022-11-25 18:21:49,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2022-11-25 18:21:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:21:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:21:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2022-11-25 18:21:49,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44948453608247424 [2022-11-25 18:21:49,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2022-11-25 18:21:49,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2022-11-25 18:21:49,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:49,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2022-11-25 18:21:49,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:49,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:49,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:49,854 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 654 transitions. [2022-11-25 18:21:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2022-11-25 18:21:49,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:21:49,857 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2022-11-25 18:21:49,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=62, 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=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-11-25 18:21:49,858 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2022-11-25 18:21:49,858 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2022-11-25 18:21:49,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:49,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:49,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:49,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:50,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:21:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2119175326, now seen corresponding path program 1 times [2022-11-25 18:21:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:50,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546710764] [2022-11-25 18:21:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:50,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:21:50,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546710764] [2022-11-25 18:21:50,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546710764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013229204] [2022-11-25 18:21:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:50,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:50,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:50,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:21:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:21:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:21:50,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:21:50,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013229204] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:50,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:21:50,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2022-11-25 18:21:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50839293] [2022-11-25 18:21:50,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:21:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:21:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:21:50,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 291 [2022-11-25 18:21:50,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:50,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:50,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 291 [2022-11-25 18:21:50,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:51,175 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2022-11-25 18:21:51,176 INFO L131 PetriNetUnfolder]: For 106/151 co-relation queries the response was YES. [2022-11-25 18:21:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 106/151 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2045 event pairs, 138 based on Foata normal form. 45/485 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2022-11-25 18:21:51,181 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2022-11-25 18:21:51,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2022-11-25 18:21:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:21:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:21:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 884 transitions. [2022-11-25 18:21:51,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4339715267550319 [2022-11-25 18:21:51,186 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 884 transitions. [2022-11-25 18:21:51,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 884 transitions. [2022-11-25 18:21:51,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:51,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 884 transitions. [2022-11-25 18:21:51,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.28571428571429) internal successors, (884), 7 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:51,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:51,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:51,197 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 884 transitions. [2022-11-25 18:21:51,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2022-11-25 18:21:51,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 18:21:51,200 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2022-11-25 18:21:51,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-11-25 18:21:51,204 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-11-25 18:21:51,212 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2022-11-25 18:21:51,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:51,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:51,213 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:51,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:51,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:51,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:21:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1475898772, now seen corresponding path program 2 times [2022-11-25 18:21:51,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:51,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039374036] [2022-11-25 18:21:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:51,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:21:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:51,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039374036] [2022-11-25 18:21:51,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039374036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:51,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430282800] [2022-11-25 18:21:51,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:21:51,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:51,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:51,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:21:51,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:21:51,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:21:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:21:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:21:51,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:21:51,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430282800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:21:51,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:21:51,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-25 18:21:51,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360075696] [2022-11-25 18:21:51,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:21:51,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:21:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:21:51,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2022-11-25 18:21:51,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:51,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:51,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2022-11-25 18:21:51,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:52,114 INFO L130 PetriNetUnfolder]: 325/477 cut-off events. [2022-11-25 18:21:52,115 INFO L131 PetriNetUnfolder]: For 228/258 co-relation queries the response was YES. [2022-11-25 18:21:52,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 477 events. 325/477 cut-off events. For 228/258 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1502 event pairs, 123 based on Foata normal form. 56/428 useless extension candidates. Maximal degree in co-relation 1357. Up to 346 conditions per place. [2022-11-25 18:21:52,120 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-11-25 18:21:52,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2022-11-25 18:21:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:21:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:21:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2022-11-25 18:21:52,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.468213058419244 [2022-11-25 18:21:52,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2022-11-25 18:21:52,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2022-11-25 18:21:52,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:52,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2022-11-25 18:21:52,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:52,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:52,129 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:52,129 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 545 transitions. [2022-11-25 18:21:52,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2022-11-25 18:21:52,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 18:21:52,133 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2022-11-25 18:21:52,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-11-25 18:21:52,134 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2022-11-25 18:21:52,134 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2022-11-25 18:21:52,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:52,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:52,135 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:52,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:52,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:52,342 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:21:52,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:52,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1934119789, now seen corresponding path program 1 times [2022-11-25 18:21:52,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:52,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944136288] [2022-11-25 18:21:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:52,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944136288] [2022-11-25 18:21:54,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944136288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364604185] [2022-11-25 18:21:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:54,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:54,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:54,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:21:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 18:21:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:21:55,055 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 35 treesize of output 33 [2022-11-25 18:21:55,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:21:55,298 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 35 treesize of output 33 [2022-11-25 18:21:55,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:21:55,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:21:55,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 39 [2022-11-25 18:21:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:55,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:56,515 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0))) (.cse0 (= c_~max1~0 c_~max2~0))) (and (or (and (or .cse0 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0))) (forall ((v_ArrVal_197 (Array Int Int)) (v_ArrVal_198 (Array Int Int))) (< c_~max3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_198) c_~A~0.base) .cse1)))) (forall ((v_ArrVal_197 (Array Int Int)) (v_ArrVal_198 (Array Int Int))) (let ((.cse2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_198) c_~A~0.base) .cse1))) (or (not (< c_~max3~0 .cse2)) (= c_~max1~0 .cse2) (<= .cse2 c_~max2~0)))) (or (forall ((v_ArrVal_197 (Array Int Int)) (v_ArrVal_198 (Array Int Int))) (let ((.cse3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_198) c_~A~0.base) .cse1))) (or (not (< c_~max3~0 .cse3)) (< c_~max2~0 .cse3)))) .cse0))) is different from false [2022-11-25 18:21:56,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:21:56,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 481 treesize of output 421 [2022-11-25 18:21:56,581 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 386 treesize of output 350 [2022-11-25 18:21:56,593 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 350 treesize of output 344 [2022-11-25 18:21:56,606 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 344 treesize of output 320 [2022-11-25 18:21:56,619 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 320 treesize of output 308 [2022-11-25 18:21:56,631 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 308 treesize of output 290 [2022-11-25 18:21:56,642 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 290 treesize of output 278 [2022-11-25 18:21:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:57,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364604185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:21:57,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:21:57,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 30 [2022-11-25 18:21:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898275120] [2022-11-25 18:21:57,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:21:57,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 18:21:57,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 18:21:57,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=803, Unknown=5, NotChecked=58, Total=992 [2022-11-25 18:21:58,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 291 [2022-11-25 18:21:58,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 32 states, 32 states have (on average 83.15625) internal successors, (2661), 32 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:58,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:58,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 291 [2022-11-25 18:21:58,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:22:04,806 INFO L130 PetriNetUnfolder]: 1695/2480 cut-off events. [2022-11-25 18:22:04,806 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-11-25 18:22:04,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7879 conditions, 2480 events. 1695/2480 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10774 event pairs, 44 based on Foata normal form. 2/2037 useless extension candidates. Maximal degree in co-relation 6552. Up to 1072 conditions per place. [2022-11-25 18:22:04,827 INFO L137 encePairwiseOnDemand]: 277/291 looper letters, 210 selfloop transitions, 112 changer transitions 4/326 dead transitions. [2022-11-25 18:22:04,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 326 transitions, 1916 flow [2022-11-25 18:22:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 18:22:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 18:22:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2382 transitions. [2022-11-25 18:22:04,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3148295003965107 [2022-11-25 18:22:04,836 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2382 transitions. [2022-11-25 18:22:04,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2382 transitions. [2022-11-25 18:22:04,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:04,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2382 transitions. [2022-11-25 18:22:04,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 91.61538461538461) internal successors, (2382), 26 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:04,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 291.0) internal successors, (7857), 27 states have internal predecessors, (7857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:04,859 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 291.0) internal successors, (7857), 27 states have internal predecessors, (7857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:04,860 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 26 states and 2382 transitions. [2022-11-25 18:22:04,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 326 transitions, 1916 flow [2022-11-25 18:22:04,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 326 transitions, 1779 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-25 18:22:04,882 INFO L231 Difference]: Finished difference. Result has 74 places, 142 transitions, 945 flow [2022-11-25 18:22:04,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=945, PETRI_PLACES=74, PETRI_TRANSITIONS=142} [2022-11-25 18:22:04,883 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2022-11-25 18:22:04,883 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 142 transitions, 945 flow [2022-11-25 18:22:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 83.15625) internal successors, (2661), 32 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:04,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:22:04,885 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:04,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:05,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:05,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:22:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash -434223697, now seen corresponding path program 2 times [2022-11-25 18:22:05,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254001061] [2022-11-25 18:22:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:05,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:06,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:06,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254001061] [2022-11-25 18:22:06,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254001061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:22:06,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711291563] [2022-11-25 18:22:06,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:22:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:06,276 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:06,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:22:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:22:06,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 18:22:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:07,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:07,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2022-11-25 18:22:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:07,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:07,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:07,975 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 127 treesize of output 75 [2022-11-25 18:22:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:08,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711291563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:22:08,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:22:08,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-11-25 18:22:08,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394350315] [2022-11-25 18:22:08,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:22:08,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:22:08,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:22:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-25 18:22:10,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 291 [2022-11-25 18:22:10,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 142 transitions, 945 flow. Second operand has 31 states, 31 states have (on average 106.2258064516129) internal successors, (3293), 31 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:10,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:22:10,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 291 [2022-11-25 18:22:10,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:22:12,656 INFO L130 PetriNetUnfolder]: 1783/2637 cut-off events. [2022-11-25 18:22:12,656 INFO L131 PetriNetUnfolder]: For 8384/8384 co-relation queries the response was YES. [2022-11-25 18:22:12,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11226 conditions, 2637 events. 1783/2637 cut-off events. For 8384/8384 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11502 event pairs, 367 based on Foata normal form. 1/2637 useless extension candidates. Maximal degree in co-relation 11016. Up to 2335 conditions per place. [2022-11-25 18:22:12,751 INFO L137 encePairwiseOnDemand]: 279/291 looper letters, 148 selfloop transitions, 68 changer transitions 6/222 dead transitions. [2022-11-25 18:22:12,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 222 transitions, 1819 flow [2022-11-25 18:22:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:22:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:22:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1332 transitions. [2022-11-25 18:22:12,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38144329896907214 [2022-11-25 18:22:12,757 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1332 transitions. [2022-11-25 18:22:12,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1332 transitions. [2022-11-25 18:22:12,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:12,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1332 transitions. [2022-11-25 18:22:12,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 111.0) internal successors, (1332), 12 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:12,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:12,769 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:12,769 INFO L175 Difference]: Start difference. First operand has 74 places, 142 transitions, 945 flow. Second operand 12 states and 1332 transitions. [2022-11-25 18:22:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 222 transitions, 1819 flow [2022-11-25 18:22:12,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 222 transitions, 1799 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 18:22:12,818 INFO L231 Difference]: Finished difference. Result has 90 places, 184 transitions, 1442 flow [2022-11-25 18:22:12,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1442, PETRI_PLACES=90, PETRI_TRANSITIONS=184} [2022-11-25 18:22:12,821 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2022-11-25 18:22:12,821 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 184 transitions, 1442 flow [2022-11-25 18:22:12,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 106.2258064516129) internal successors, (3293), 31 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:12,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:22:12,823 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:12,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:13,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:22:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 313320617, now seen corresponding path program 3 times [2022-11-25 18:22:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232267593] [2022-11-25 18:22:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:13,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:13,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232267593] [2022-11-25 18:22:13,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232267593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:22:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414946036] [2022-11-25 18:22:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:22:13,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:13,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:13,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:14,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:22:14,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:22:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:22:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:14,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:14,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2022-11-25 18:22:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:14,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:15,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:15,414 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 127 treesize of output 75 [2022-11-25 18:22:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414946036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:22:16,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:22:16,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2022-11-25 18:22:16,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71646191] [2022-11-25 18:22:16,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:22:16,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:22:16,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:22:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:22:17,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 291 [2022-11-25 18:22:17,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 184 transitions, 1442 flow. Second operand has 23 states, 23 states have (on average 113.6086956521739) internal successors, (2613), 23 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:17,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:22:17,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 291 [2022-11-25 18:22:17,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:22:18,623 INFO L130 PetriNetUnfolder]: 2097/3157 cut-off events. [2022-11-25 18:22:18,623 INFO L131 PetriNetUnfolder]: For 13205/13374 co-relation queries the response was YES. [2022-11-25 18:22:18,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14371 conditions, 3157 events. 2097/3157 cut-off events. For 13205/13374 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15391 event pairs, 302 based on Foata normal form. 101/3193 useless extension candidates. Maximal degree in co-relation 14167. Up to 2138 conditions per place. [2022-11-25 18:22:18,654 INFO L137 encePairwiseOnDemand]: 280/291 looper letters, 172 selfloop transitions, 107 changer transitions 3/293 dead transitions. [2022-11-25 18:22:18,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 293 transitions, 2669 flow [2022-11-25 18:22:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:22:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:22:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1561 transitions. [2022-11-25 18:22:18,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41263547449114457 [2022-11-25 18:22:18,660 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1561 transitions. [2022-11-25 18:22:18,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1561 transitions. [2022-11-25 18:22:18,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:18,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1561 transitions. [2022-11-25 18:22:18,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.07692307692308) internal successors, (1561), 13 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:18,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:18,673 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:18,673 INFO L175 Difference]: Start difference. First operand has 90 places, 184 transitions, 1442 flow. Second operand 13 states and 1561 transitions. [2022-11-25 18:22:18,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 293 transitions, 2669 flow [2022-11-25 18:22:18,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 293 transitions, 2596 flow, removed 34 selfloop flow, removed 2 redundant places. [2022-11-25 18:22:18,732 INFO L231 Difference]: Finished difference. Result has 104 places, 223 transitions, 2005 flow [2022-11-25 18:22:18,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2005, PETRI_PLACES=104, PETRI_TRANSITIONS=223} [2022-11-25 18:22:18,733 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2022-11-25 18:22:18,733 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 223 transitions, 2005 flow [2022-11-25 18:22:18,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 113.6086956521739) internal successors, (2613), 23 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:18,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:22:18,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:18,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:18,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:18,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:22:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash 481860625, now seen corresponding path program 4 times [2022-11-25 18:22:18,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221986651] [2022-11-25 18:22:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:18,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221986651] [2022-11-25 18:22:19,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221986651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:22:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609815551] [2022-11-25 18:22:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:22:19,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:19,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:19,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:22:20,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:22:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 18:22:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:20,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:20,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-25 18:22:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:22:21,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:21,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:21,504 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 119 treesize of output 75 [2022-11-25 18:22:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:22:22,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609815551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:22:22,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:22:22,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-11-25 18:22:22,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782940580] [2022-11-25 18:22:22,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:22:22,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 18:22:22,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 18:22:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-11-25 18:22:23,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 291 [2022-11-25 18:22:23,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 223 transitions, 2005 flow. Second operand has 28 states, 28 states have (on average 106.46428571428571) internal successors, (2981), 28 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:23,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:22:23,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 291 [2022-11-25 18:22:23,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:22:25,982 INFO L130 PetriNetUnfolder]: 2420/3693 cut-off events. [2022-11-25 18:22:25,982 INFO L131 PetriNetUnfolder]: For 17104/17104 co-relation queries the response was YES. [2022-11-25 18:22:25,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18193 conditions, 3693 events. 2420/3693 cut-off events. For 17104/17104 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18094 event pairs, 562 based on Foata normal form. 3/3696 useless extension candidates. Maximal degree in co-relation 17939. Up to 3198 conditions per place. [2022-11-25 18:22:26,027 INFO L137 encePairwiseOnDemand]: 279/291 looper letters, 231 selfloop transitions, 98 changer transitions 18/347 dead transitions. [2022-11-25 18:22:26,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 347 transitions, 3513 flow [2022-11-25 18:22:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:22:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:22:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2008 transitions. [2022-11-25 18:22:26,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.383352424589538 [2022-11-25 18:22:26,034 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2008 transitions. [2022-11-25 18:22:26,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2008 transitions. [2022-11-25 18:22:26,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:26,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2008 transitions. [2022-11-25 18:22:26,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 111.55555555555556) internal successors, (2008), 18 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:26,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 291.0) internal successors, (5529), 19 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:26,049 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 291.0) internal successors, (5529), 19 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:26,050 INFO L175 Difference]: Start difference. First operand has 104 places, 223 transitions, 2005 flow. Second operand 18 states and 2008 transitions. [2022-11-25 18:22:26,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 347 transitions, 3513 flow [2022-11-25 18:22:26,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 347 transitions, 3392 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-11-25 18:22:26,134 INFO L231 Difference]: Finished difference. Result has 127 places, 273 transitions, 2772 flow [2022-11-25 18:22:26,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2772, PETRI_PLACES=127, PETRI_TRANSITIONS=273} [2022-11-25 18:22:26,135 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2022-11-25 18:22:26,135 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 273 transitions, 2772 flow [2022-11-25 18:22:26,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 106.46428571428571) internal successors, (2981), 28 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:26,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:22:26,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:26,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:26,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:26,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:22:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1120022869, now seen corresponding path program 5 times [2022-11-25 18:22:26,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:26,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971938307] [2022-11-25 18:22:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:26,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:27,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971938307] [2022-11-25 18:22:27,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971938307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:22:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582278796] [2022-11-25 18:22:27,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:22:27,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:27,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:27,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:27,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:22:27,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:22:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 18:22:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:27,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:22:27,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:22:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:22:27,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:22:28,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:28,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-25 18:22:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:28,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:30,310 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))) (.cse11 (= c_~max1~0 c_~max2~0)) (.cse3 (< c_~max2~0 c_~max3~0))) (and (or (forall ((~M~0 Int) (v_ArrVal_379 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse0 (select .cse1 .cse2))) (or (< c_thread1Thread1of1ForFork2_~i~0 ~M~0) (not (< c_~max1~0 .cse0)) (< ~M~0 c_thread1Thread1of1ForFork2_~i~0) (= .cse0 c_~max2~0) (< c_~max3~0 (select .cse1 (+ c_~A~0.offset (* ~M~0 4)))))))) .cse3) (forall ((~M~0 Int)) (or (< c_thread1Thread1of1ForFork2_~i~0 ~M~0) (< ~M~0 c_thread1Thread1of1ForFork2_~i~0) (forall ((v_ArrVal_379 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse4 (select .cse5 .cse2))) (or (not (< c_~max1~0 .cse4)) (= .cse4 c_~max3~0) (< c_~max3~0 (select .cse5 (+ c_~A~0.offset (* ~M~0 4)))))))))) (forall ((v_ArrVal_379 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse2))) (or (forall ((~M~0 Int)) (let ((.cse6 (select .cse7 (+ c_~A~0.offset (* ~M~0 4))))) (or (< c_thread1Thread1of1ForFork2_~i~0 ~M~0) (< ~M~0 c_thread1Thread1of1ForFork2_~i~0) (not (< c_~max3~0 .cse6)) (< c_~max2~0 .cse6)))) (not (< c_~max1~0 .cse8)) (= .cse8 c_~max2~0))))) (forall ((v_ArrVal_379 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (or (forall ((~M~0 Int)) (let ((.cse9 (select .cse10 (+ c_~A~0.offset (* ~M~0 4))))) (or (< c_thread1Thread1of1ForFork2_~i~0 ~M~0) (= .cse9 c_~max1~0) (< ~M~0 c_thread1Thread1of1ForFork2_~i~0) (<= .cse9 c_~max2~0) (not (< c_~max3~0 .cse9))))) (< c_~max1~0 (select .cse10 .cse2))))) (or .cse11 (forall ((~M~0 Int) (v_ArrVal_379 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse13 (select .cse12 (+ c_~A~0.offset (* ~M~0 4))))) (or (< c_thread1Thread1of1ForFork2_~i~0 ~M~0) (< ~M~0 c_thread1Thread1of1ForFork2_~i~0) (< c_~max1~0 (select .cse12 .cse2)) (not (< c_~max3~0 .cse13)) (< c_~max2~0 .cse13)))))) (or (forall ((~M~0 Int) (v_ArrVal_379 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (or (< c_thread1Thread1of1ForFork2_~i~0 ~M~0) (< ~M~0 c_thread1Thread1of1ForFork2_~i~0) (< c_~max1~0 (select .cse14 .cse2)) (< c_~max3~0 (select .cse14 (+ c_~A~0.offset (* ~M~0 4))))))) (and (or .cse11 .cse3) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0)))))) is different from false [2022-11-25 18:22:31,289 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (= c_~max1~0 c_~max2~0)) (.cse12 (< c_~max2~0 c_~max3~0))) (and (forall ((~M~0 Int) (v_ArrVal_378 (Array Int Int))) (or (< 0 ~M~0) (< ~M~0 0) (forall ((v_ArrVal_379 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse0 (select .cse1 c_~A~0.offset))) (or (= c_~max3~0 .cse0) (not (< c_~max1~0 .cse0)) (< c_~max3~0 (select .cse1 (+ c_~A~0.offset (* ~M~0 4)))))))))) (or (forall ((~M~0 Int) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse2 (select .cse3 (+ c_~A~0.offset (* ~M~0 4))))) (or (< 0 ~M~0) (< ~M~0 0) (not (< c_~max3~0 .cse2)) (< c_~max1~0 (select .cse3 c_~A~0.offset)) (< c_~max2~0 .cse2))))) .cse4) (forall ((v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (or (forall ((~M~0 Int)) (let ((.cse5 (select .cse6 (+ c_~A~0.offset (* ~M~0 4))))) (or (= c_~max1~0 .cse5) (< 0 ~M~0) (< ~M~0 0) (not (< c_~max3~0 .cse5)) (<= .cse5 c_~max2~0)))) (< c_~max1~0 (select .cse6 c_~A~0.offset))))) (forall ((v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse9 (select .cse8 c_~A~0.offset))) (or (forall ((~M~0 Int)) (let ((.cse7 (select .cse8 (+ c_~A~0.offset (* ~M~0 4))))) (or (< 0 ~M~0) (< ~M~0 0) (not (< c_~max3~0 .cse7)) (< c_~max2~0 .cse7)))) (not (< c_~max1~0 .cse9)) (= c_~max2~0 .cse9))))) (or (forall ((~M~0 Int) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (let ((.cse10 (select .cse11 c_~A~0.offset))) (or (< 0 ~M~0) (< ~M~0 0) (not (< c_~max1~0 .cse10)) (< c_~max3~0 (select .cse11 (+ c_~A~0.offset (* ~M~0 4)))) (= c_~max2~0 .cse10))))) .cse12) (or (and (or .cse4 .cse12) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0))) (forall ((~M~0 Int) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) c_~A~0.base))) (or (< 0 ~M~0) (< ~M~0 0) (< c_~max1~0 (select .cse13 c_~A~0.offset)) (< c_~max3~0 (select .cse13 (+ c_~A~0.offset (* ~M~0 4)))))))))) is different from false [2022-11-25 18:22:31,700 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (= c_~max1~0 c_~max2~0)) (.cse6 (< c_~max2~0 c_~max3~0))) (and (forall ((v_ArrVal_377 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse1 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_377) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((~M~0 Int)) (let ((.cse0 (select .cse1 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (or (<= .cse0 c_~max2~0) (< 0 ~M~0) (= c_~max1~0 .cse0) (< ~M~0 0) (not (< c_~max3~0 .cse0))))) (< c_~max1~0 (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or .cse2 (forall ((~M~0 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse4 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_377) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse3 (select .cse4 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (or (< 0 ~M~0) (< ~M~0 0) (< c_~max2~0 .cse3) (< c_~max1~0 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (not (< c_~max3~0 .cse3))))))) (or (forall ((~M~0 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse5 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_377) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< c_~max3~0 (select .cse5 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (< 0 ~M~0) (< ~M~0 0) (< c_~max1~0 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (and (or .cse2 .cse6) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0)))) (forall ((v_ArrVal_377 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse8 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_377) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (forall ((~M~0 Int)) (let ((.cse7 (select .cse8 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (or (< 0 ~M~0) (< ~M~0 0) (< c_~max2~0 .cse7) (not (< c_~max3~0 .cse7))))) (not (< c_~max1~0 .cse9)) (= .cse9 c_~max2~0))))) (or (forall ((~M~0 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (let ((.cse10 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_377) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< c_~max3~0 (select .cse10 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (< c_~max1~0 .cse11)) (< 0 ~M~0) (< ~M~0 0) (= .cse11 c_~max2~0))))) .cse6) (forall ((~M~0 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (or (< 0 ~M~0) (< ~M~0 0) (forall ((v_ArrVal_379 (Array Int Int))) (let ((.cse12 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_377) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_379) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse13 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< c_~max3~0 (select .cse12 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (= .cse13 c_~max3~0) (not (< c_~max1~0 .cse13)))))))))) is different from false [2022-11-25 18:22:31,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:22:31,775 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 126 treesize of output 90 [2022-11-25 18:22:31,802 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:22:31,803 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 4694 treesize of output 4474 [2022-11-25 18:22:31,893 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:22:31,894 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 4470 treesize of output 4314 [2022-11-25 18:22:31,971 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:22:31,972 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 4310 treesize of output 3674 [2022-11-25 18:22:32,057 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:22:32,058 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 3670 treesize of output 3354 [2022-11-25 18:33:37,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:33:37,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2022-11-25 18:33:37,751 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:37,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1593 treesize of output 1533 [2022-11-25 18:33:37,802 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:37,803 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 1529 treesize of output 1493 [2022-11-25 18:33:37,837 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:37,839 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 1489 treesize of output 1333 [2022-11-25 18:33:37,875 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:37,875 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 1329 treesize of output 1253 [2022-11-25 18:34:18,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:18,568 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 123 treesize of output 87 [2022-11-25 18:34:18,588 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:18,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 527 treesize of output 507 [2022-11-25 18:34:18,627 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:18,628 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 503 treesize of output 443 [2022-11-25 18:34:18,660 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:18,661 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 439 treesize of output 411 [2022-11-25 18:34:18,688 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:18,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 301 [2022-11-25 18:34:19,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:19,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2022-11-25 18:34:19,635 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:19,636 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 1593 treesize of output 1533 [2022-11-25 18:34:19,673 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:19,673 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 1529 treesize of output 1453 [2022-11-25 18:34:19,710 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:19,710 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 1449 treesize of output 1293 [2022-11-25 18:34:19,753 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:19,754 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 885 treesize of output 849 [2022-11-25 18:34:20,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:20,944 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 94 treesize of output 70 [2022-11-25 18:34:20,970 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:20,970 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 845 treesize of output 809 [2022-11-25 18:34:20,999 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:21,000 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 805 treesize of output 697 [2022-11-25 18:34:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:34:21,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 479 treesize of output 451 [2022-11-25 18:34:21,046 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:21,046 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 665 treesize of output 613 [2022-11-25 18:34:22,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:22,782 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 [2022-11-25 18:34:22,805 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:22,806 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 531 treesize of output 511 [2022-11-25 18:34:22,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:34:22,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 245 [2022-11-25 18:34:22,850 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:22,851 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 491 treesize of output 463 [2022-11-25 18:34:22,882 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:22,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 459 treesize of output 399 [2022-11-25 18:34:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 18:34:23,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582278796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:23,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:23,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-25 18:34:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869564954] [2022-11-25 18:34:23,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:34:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:34:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=563, Unknown=11, NotChecked=162, Total=930 [2022-11-25 18:34:23,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 291 [2022-11-25 18:34:23,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 273 transitions, 2772 flow. Second operand has 31 states, 31 states have (on average 80.03225806451613) internal successors, (2481), 31 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:23,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:23,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 291 [2022-11-25 18:34:23,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:32,770 INFO L130 PetriNetUnfolder]: 3807/5955 cut-off events. [2022-11-25 18:34:32,770 INFO L131 PetriNetUnfolder]: For 37423/37423 co-relation queries the response was YES. [2022-11-25 18:34:32,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31169 conditions, 5955 events. 3807/5955 cut-off events. For 37423/37423 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34327 event pairs, 230 based on Foata normal form. 2/5957 useless extension candidates. Maximal degree in co-relation 30868. Up to 3694 conditions per place. [2022-11-25 18:34:32,831 INFO L137 encePairwiseOnDemand]: 276/291 looper letters, 313 selfloop transitions, 293 changer transitions 14/620 dead transitions. [2022-11-25 18:34:32,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 620 transitions, 7061 flow [2022-11-25 18:34:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 18:34:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 18:34:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2561 transitions. [2022-11-25 18:34:32,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29335624284077894 [2022-11-25 18:34:32,839 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2561 transitions. [2022-11-25 18:34:32,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2561 transitions. [2022-11-25 18:34:32,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:32,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2561 transitions. [2022-11-25 18:34:32,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 85.36666666666666) internal successors, (2561), 30 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 291.0) internal successors, (9021), 31 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,859 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 291.0) internal successors, (9021), 31 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,860 INFO L175 Difference]: Start difference. First operand has 127 places, 273 transitions, 2772 flow. Second operand 30 states and 2561 transitions. [2022-11-25 18:34:32,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 620 transitions, 7061 flow [2022-11-25 18:34:33,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 620 transitions, 6820 flow, removed 114 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:33,097 INFO L231 Difference]: Finished difference. Result has 165 places, 494 transitions, 5903 flow [2022-11-25 18:34:33,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5903, PETRI_PLACES=165, PETRI_TRANSITIONS=494} [2022-11-25 18:34:33,099 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2022-11-25 18:34:33,099 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 494 transitions, 5903 flow [2022-11-25 18:34:33,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 80.03225806451613) internal successors, (2481), 31 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:33,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:33,101 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:33,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:33,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:34:33,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:34:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1808268685, now seen corresponding path program 6 times [2022-11-25 18:34:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766149513] [2022-11-25 18:34:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:34,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:34,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766149513] [2022-11-25 18:34:34,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766149513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799381454] [2022-11-25 18:34:34,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:34:34,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:34,355 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:34,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:34:34,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:34:34,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:34:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:35,042 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 62 treesize of output 38 [2022-11-25 18:34:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:35,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:35,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:35,529 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 119 treesize of output 75 [2022-11-25 18:34:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:36,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799381454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:36,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:36,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 24 [2022-11-25 18:34:36,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324883554] [2022-11-25 18:34:36,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:34:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:34:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:34:37,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2022-11-25 18:34:37,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 494 transitions, 5903 flow. Second operand has 26 states, 26 states have (on average 107.65384615384616) internal successors, (2799), 26 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:37,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:37,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2022-11-25 18:34:37,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:41,105 INFO L130 PetriNetUnfolder]: 4011/6299 cut-off events. [2022-11-25 18:34:41,105 INFO L131 PetriNetUnfolder]: For 51964/51964 co-relation queries the response was YES. [2022-11-25 18:34:41,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38181 conditions, 6299 events. 4011/6299 cut-off events. For 51964/51964 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36467 event pairs, 629 based on Foata normal form. 31/6330 useless extension candidates. Maximal degree in co-relation 37852. Up to 4991 conditions per place. [2022-11-25 18:34:41,286 INFO L137 encePairwiseOnDemand]: 279/291 looper letters, 415 selfloop transitions, 236 changer transitions 10/661 dead transitions. [2022-11-25 18:34:41,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 661 transitions, 8967 flow [2022-11-25 18:34:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:34:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:34:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3015 transitions. [2022-11-25 18:34:41,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3837342497136312 [2022-11-25 18:34:41,294 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3015 transitions. [2022-11-25 18:34:41,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3015 transitions. [2022-11-25 18:34:41,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:41,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3015 transitions. [2022-11-25 18:34:41,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.66666666666667) internal successors, (3015), 27 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:41,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 291.0) internal successors, (8148), 28 states have internal predecessors, (8148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:41,316 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 291.0) internal successors, (8148), 28 states have internal predecessors, (8148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:41,316 INFO L175 Difference]: Start difference. First operand has 165 places, 494 transitions, 5903 flow. Second operand 27 states and 3015 transitions. [2022-11-25 18:34:41,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 661 transitions, 8967 flow [2022-11-25 18:34:41,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 661 transitions, 8304 flow, removed 317 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:41,828 INFO L231 Difference]: Finished difference. Result has 197 places, 569 transitions, 7038 flow [2022-11-25 18:34:41,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7038, PETRI_PLACES=197, PETRI_TRANSITIONS=569} [2022-11-25 18:34:41,830 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2022-11-25 18:34:41,830 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 569 transitions, 7038 flow [2022-11-25 18:34:41,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 107.65384615384616) internal successors, (2799), 26 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:41,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:41,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:41,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:34:42,038 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:34:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1112702709, now seen corresponding path program 7 times [2022-11-25 18:34:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:42,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900231956] [2022-11-25 18:34:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:42,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900231956] [2022-11-25 18:34:42,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900231956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:42,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604230980] [2022-11-25 18:34:42,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:34:42,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:42,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:42,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:42,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:34:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:34:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:43,518 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-25 18:34:43,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2022-11-25 18:34:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:43,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:43,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:43,885 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 119 treesize of output 75 [2022-11-25 18:34:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:44,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604230980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:44,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:44,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2022-11-25 18:34:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115846652] [2022-11-25 18:34:44,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:34:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:34:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:34:45,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2022-11-25 18:34:45,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 569 transitions, 7038 flow. Second operand has 24 states, 24 states have (on average 110.45833333333333) internal successors, (2651), 24 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:45,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:45,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2022-11-25 18:34:45,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:47,815 INFO L130 PetriNetUnfolder]: 3888/6187 cut-off events. [2022-11-25 18:34:47,815 INFO L131 PetriNetUnfolder]: For 52818/53203 co-relation queries the response was YES. [2022-11-25 18:34:47,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37395 conditions, 6187 events. 3888/6187 cut-off events. For 52818/53203 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37042 event pairs, 748 based on Foata normal form. 164/6292 useless extension candidates. Maximal degree in co-relation 37101. Up to 5578 conditions per place. [2022-11-25 18:34:47,874 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 466 selfloop transitions, 152 changer transitions 1/637 dead transitions. [2022-11-25 18:34:47,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 637 transitions, 8830 flow [2022-11-25 18:34:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:34:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:34:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1164 transitions. [2022-11-25 18:34:47,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-11-25 18:34:47,877 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1164 transitions. [2022-11-25 18:34:47,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1164 transitions. [2022-11-25 18:34:47,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:47,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1164 transitions. [2022-11-25 18:34:47,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.4) internal successors, (1164), 10 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,884 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,884 INFO L175 Difference]: Start difference. First operand has 197 places, 569 transitions, 7038 flow. Second operand 10 states and 1164 transitions. [2022-11-25 18:34:47,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 637 transitions, 8830 flow [2022-11-25 18:34:48,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 637 transitions, 8673 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-11-25 18:34:48,255 INFO L231 Difference]: Finished difference. Result has 202 places, 589 transitions, 7484 flow [2022-11-25 18:34:48,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=6881, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7484, PETRI_PLACES=202, PETRI_TRANSITIONS=589} [2022-11-25 18:34:48,257 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2022-11-25 18:34:48,257 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 589 transitions, 7484 flow [2022-11-25 18:34:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.45833333333333) internal successors, (2651), 24 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:48,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:48,259 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:48,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:48,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:34:48,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:34:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1518990935, now seen corresponding path program 8 times [2022-11-25 18:34:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45964517] [2022-11-25 18:34:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:49,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45964517] [2022-11-25 18:34:49,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45964517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22056452] [2022-11-25 18:34:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:34:49,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:49,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:49,403 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:49,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:34:49,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:34:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:34:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:50,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:50,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-25 18:34:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:50,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:50,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:50,899 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 103 treesize of output 73 [2022-11-25 18:34:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:51,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22056452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:51,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-11-25 18:34:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666747960] [2022-11-25 18:34:51,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 18:34:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 18:34:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:34:52,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2022-11-25 18:34:52,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 589 transitions, 7484 flow. Second operand has 29 states, 29 states have (on average 107.20689655172414) internal successors, (3109), 29 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:52,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:52,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2022-11-25 18:34:52,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:55,953 INFO L130 PetriNetUnfolder]: 4381/6897 cut-off events. [2022-11-25 18:34:55,953 INFO L131 PetriNetUnfolder]: For 58827/58827 co-relation queries the response was YES. [2022-11-25 18:34:55,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42349 conditions, 6897 events. 4381/6897 cut-off events. For 58827/58827 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 40540 event pairs, 842 based on Foata normal form. 1/6898 useless extension candidates. Maximal degree in co-relation 42012. Up to 6263 conditions per place. [2022-11-25 18:34:56,005 INFO L137 encePairwiseOnDemand]: 277/291 looper letters, 485 selfloop transitions, 219 changer transitions 7/711 dead transitions. [2022-11-25 18:34:56,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 711 transitions, 10101 flow [2022-11-25 18:34:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:34:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:34:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2025 transitions. [2022-11-25 18:34:56,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3865979381443299 [2022-11-25 18:34:56,015 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2025 transitions. [2022-11-25 18:34:56,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2025 transitions. [2022-11-25 18:34:56,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:56,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2025 transitions. [2022-11-25 18:34:56,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.5) internal successors, (2025), 18 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:56,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 291.0) internal successors, (5529), 19 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:56,027 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 291.0) internal successors, (5529), 19 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:56,027 INFO L175 Difference]: Start difference. First operand has 202 places, 589 transitions, 7484 flow. Second operand 18 states and 2025 transitions. [2022-11-25 18:34:56,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 711 transitions, 10101 flow [2022-11-25 18:34:56,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 711 transitions, 9899 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-25 18:34:56,366 INFO L231 Difference]: Finished difference. Result has 222 places, 650 transitions, 8738 flow [2022-11-25 18:34:56,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=7293, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8738, PETRI_PLACES=222, PETRI_TRANSITIONS=650} [2022-11-25 18:34:56,367 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2022-11-25 18:34:56,367 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 650 transitions, 8738 flow [2022-11-25 18:34:56,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 107.20689655172414) internal successors, (3109), 29 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:56,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:56,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:56,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 18:34:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:56,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:34:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash -515543615, now seen corresponding path program 9 times [2022-11-25 18:34:56,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:56,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800993174] [2022-11-25 18:34:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800993174] [2022-11-25 18:34:57,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800993174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866303480] [2022-11-25 18:34:57,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:34:57,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:57,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:57,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:34:57,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:34:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:34:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:58,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:58,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-25 18:34:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:58,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:58,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:58,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 73 [2022-11-25 18:34:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:59,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866303480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:59,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:59,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2022-11-25 18:34:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639244283] [2022-11-25 18:34:59,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:59,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:34:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:34:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:35:00,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 291 [2022-11-25 18:35:00,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 650 transitions, 8738 flow. Second operand has 23 states, 23 states have (on average 113.34782608695652) internal successors, (2607), 23 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:00,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:00,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 291 [2022-11-25 18:35:00,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:03,870 INFO L130 PetriNetUnfolder]: 4300/6892 cut-off events. [2022-11-25 18:35:03,870 INFO L131 PetriNetUnfolder]: For 70771/71188 co-relation queries the response was YES. [2022-11-25 18:35:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44142 conditions, 6892 events. 4300/6892 cut-off events. For 70771/71188 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42693 event pairs, 570 based on Foata normal form. 190/7029 useless extension candidates. Maximal degree in co-relation 43692. Up to 5389 conditions per place. [2022-11-25 18:35:03,919 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 491 selfloop transitions, 227 changer transitions 3/739 dead transitions. [2022-11-25 18:35:03,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 739 transitions, 11170 flow [2022-11-25 18:35:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:35:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:35:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1771 transitions. [2022-11-25 18:35:03,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4057273768613975 [2022-11-25 18:35:03,923 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1771 transitions. [2022-11-25 18:35:03,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1771 transitions. [2022-11-25 18:35:03,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:03,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1771 transitions. [2022-11-25 18:35:03,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 118.06666666666666) internal successors, (1771), 15 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:03,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 291.0) internal successors, (4656), 16 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:03,932 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 291.0) internal successors, (4656), 16 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:03,932 INFO L175 Difference]: Start difference. First operand has 222 places, 650 transitions, 8738 flow. Second operand 15 states and 1771 transitions. [2022-11-25 18:35:03,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 739 transitions, 11170 flow [2022-11-25 18:35:04,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 739 transitions, 10499 flow, removed 246 selfloop flow, removed 6 redundant places. [2022-11-25 18:35:04,296 INFO L231 Difference]: Finished difference. Result has 235 places, 693 transitions, 9349 flow [2022-11-25 18:35:04,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=8167, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9349, PETRI_PLACES=235, PETRI_TRANSITIONS=693} [2022-11-25 18:35:04,297 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2022-11-25 18:35:04,297 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 693 transitions, 9349 flow [2022-11-25 18:35:04,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 113.34782608695652) internal successors, (2607), 23 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:04,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:04,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:04,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:04,499 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:35:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash 819503031, now seen corresponding path program 10 times [2022-11-25 18:35:04,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:04,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286359886] [2022-11-25 18:35:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:04,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:05,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286359886] [2022-11-25 18:35:05,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286359886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56785250] [2022-11-25 18:35:05,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:35:05,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:05,278 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:05,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:35:05,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:35:05,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:35:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 18:35:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:05,995 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-25 18:35:05,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 69 [2022-11-25 18:35:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:35:06,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:06,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:06,571 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 103 treesize of output 73 [2022-11-25 18:35:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:35:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56785250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:07,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:07,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2022-11-25 18:35:07,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138095000] [2022-11-25 18:35:07,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:07,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:35:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:35:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:35:08,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 291 [2022-11-25 18:35:08,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 693 transitions, 9349 flow. Second operand has 27 states, 27 states have (on average 106.29629629629629) internal successors, (2870), 27 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:08,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:08,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 291 [2022-11-25 18:35:08,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:13,515 INFO L130 PetriNetUnfolder]: 5274/8356 cut-off events. [2022-11-25 18:35:13,515 INFO L131 PetriNetUnfolder]: For 83040/83040 co-relation queries the response was YES. [2022-11-25 18:35:13,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53353 conditions, 8356 events. 5274/8356 cut-off events. For 83040/83040 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 52024 event pairs, 438 based on Foata normal form. 3/8359 useless extension candidates. Maximal degree in co-relation 52900. Up to 4850 conditions per place. [2022-11-25 18:35:13,582 INFO L137 encePairwiseOnDemand]: 276/291 looper letters, 456 selfloop transitions, 422 changer transitions 11/889 dead transitions. [2022-11-25 18:35:13,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 889 transitions, 13140 flow [2022-11-25 18:35:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 18:35:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 18:35:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2792 transitions. [2022-11-25 18:35:13,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38378006872852233 [2022-11-25 18:35:13,587 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2792 transitions. [2022-11-25 18:35:13,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2792 transitions. [2022-11-25 18:35:13,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:13,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2792 transitions. [2022-11-25 18:35:13,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 111.68) internal successors, (2792), 25 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:13,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 291.0) internal successors, (7566), 26 states have internal predecessors, (7566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:13,601 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 291.0) internal successors, (7566), 26 states have internal predecessors, (7566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:13,601 INFO L175 Difference]: Start difference. First operand has 235 places, 693 transitions, 9349 flow. Second operand 25 states and 2792 transitions. [2022-11-25 18:35:13,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 889 transitions, 13140 flow [2022-11-25 18:35:14,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 889 transitions, 12810 flow, removed 117 selfloop flow, removed 5 redundant places. [2022-11-25 18:35:14,132 INFO L231 Difference]: Finished difference. Result has 258 places, 776 transitions, 11252 flow [2022-11-25 18:35:14,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9049, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11252, PETRI_PLACES=258, PETRI_TRANSITIONS=776} [2022-11-25 18:35:14,133 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2022-11-25 18:35:14,133 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 776 transitions, 11252 flow [2022-11-25 18:35:14,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.29629629629629) internal successors, (2870), 27 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:14,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:14,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:14,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:35:14,334 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:35:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1812378787, now seen corresponding path program 11 times [2022-11-25 18:35:14,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:14,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371667277] [2022-11-25 18:35:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:14,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:15,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371667277] [2022-11-25 18:35:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371667277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737560249] [2022-11-25 18:35:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:35:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:15,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:35:15,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:35:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:35:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:35:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:16,286 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 62 treesize of output 38 [2022-11-25 18:35:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:16,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:16,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:16,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 73 [2022-11-25 18:35:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:17,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737560249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:17,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:17,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 24 [2022-11-25 18:35:17,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146068105] [2022-11-25 18:35:17,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:35:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:35:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:35:19,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 291 [2022-11-25 18:35:19,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 776 transitions, 11252 flow. Second operand has 26 states, 26 states have (on average 108.65384615384616) internal successors, (2825), 26 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:19,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:19,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 291 [2022-11-25 18:35:19,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:24,307 INFO L130 PetriNetUnfolder]: 5385/8509 cut-off events. [2022-11-25 18:35:24,307 INFO L131 PetriNetUnfolder]: For 93313/93313 co-relation queries the response was YES. [2022-11-25 18:35:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58275 conditions, 8509 events. 5385/8509 cut-off events. For 93313/93313 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 52699 event pairs, 893 based on Foata normal form. 3/8512 useless extension candidates. Maximal degree in co-relation 57839. Up to 6511 conditions per place. [2022-11-25 18:35:24,525 INFO L137 encePairwiseOnDemand]: 279/291 looper letters, 542 selfloop transitions, 355 changer transitions 12/909 dead transitions. [2022-11-25 18:35:24,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 909 transitions, 14273 flow [2022-11-25 18:35:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 18:35:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 18:35:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3166 transitions. [2022-11-25 18:35:24,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38856161021109475 [2022-11-25 18:35:24,530 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3166 transitions. [2022-11-25 18:35:24,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3166 transitions. [2022-11-25 18:35:24,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:24,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3166 transitions. [2022-11-25 18:35:24,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 113.07142857142857) internal successors, (3166), 28 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:24,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 291.0) internal successors, (8439), 29 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:24,542 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 291.0) internal successors, (8439), 29 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:24,542 INFO L175 Difference]: Start difference. First operand has 258 places, 776 transitions, 11252 flow. Second operand 28 states and 3166 transitions. [2022-11-25 18:35:24,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 909 transitions, 14273 flow [2022-11-25 18:35:25,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 909 transitions, 13751 flow, removed 150 selfloop flow, removed 9 redundant places. [2022-11-25 18:35:25,152 INFO L231 Difference]: Finished difference. Result has 279 places, 806 transitions, 12068 flow [2022-11-25 18:35:25,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=10722, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12068, PETRI_PLACES=279, PETRI_TRANSITIONS=806} [2022-11-25 18:35:25,153 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2022-11-25 18:35:25,153 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 806 transitions, 12068 flow [2022-11-25 18:35:25,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 108.65384615384616) internal successors, (2825), 26 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:25,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:25,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:25,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 18:35:25,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:35:25,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:35:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1233683805, now seen corresponding path program 12 times [2022-11-25 18:35:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702800703] [2022-11-25 18:35:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:26,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702800703] [2022-11-25 18:35:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702800703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074303352] [2022-11-25 18:35:26,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:35:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:26,191 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:26,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:35:26,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:35:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:35:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:35:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:26,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:26,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-25 18:35:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:27,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:27,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:27,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 75 [2022-11-25 18:35:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:28,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074303352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:28,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:28,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-11-25 18:35:28,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794436351] [2022-11-25 18:35:28,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:28,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 18:35:28,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 18:35:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-11-25 18:35:29,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 291 [2022-11-25 18:35:29,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 806 transitions, 12068 flow. Second operand has 28 states, 28 states have (on average 106.0) internal successors, (2968), 28 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:29,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:29,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 291 [2022-11-25 18:35:29,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:33,517 INFO L130 PetriNetUnfolder]: 5414/8585 cut-off events. [2022-11-25 18:35:33,517 INFO L131 PetriNetUnfolder]: For 96856/96856 co-relation queries the response was YES. [2022-11-25 18:35:33,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59779 conditions, 8585 events. 5414/8585 cut-off events. For 96856/96856 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 53359 event pairs, 1219 based on Foata normal form. 1/8586 useless extension candidates. Maximal degree in co-relation 59563. Up to 8108 conditions per place. [2022-11-25 18:35:33,604 INFO L137 encePairwiseOnDemand]: 279/291 looper letters, 677 selfloop transitions, 178 changer transitions 7/862 dead transitions. [2022-11-25 18:35:33,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 862 transitions, 14264 flow [2022-11-25 18:35:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:35:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:35:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1658 transitions. [2022-11-25 18:35:33,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37983963344788085 [2022-11-25 18:35:33,608 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1658 transitions. [2022-11-25 18:35:33,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1658 transitions. [2022-11-25 18:35:33,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:33,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1658 transitions. [2022-11-25 18:35:33,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.53333333333333) internal successors, (1658), 15 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:33,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 291.0) internal successors, (4656), 16 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:33,617 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 291.0) internal successors, (4656), 16 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:33,617 INFO L175 Difference]: Start difference. First operand has 279 places, 806 transitions, 12068 flow. Second operand 15 states and 1658 transitions. [2022-11-25 18:35:33,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 862 transitions, 14264 flow [2022-11-25 18:35:34,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 862 transitions, 14052 flow, removed 37 selfloop flow, removed 10 redundant places. [2022-11-25 18:35:34,437 INFO L231 Difference]: Finished difference. Result has 286 places, 817 transitions, 12420 flow [2022-11-25 18:35:34,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=11858, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12420, PETRI_PLACES=286, PETRI_TRANSITIONS=817} [2022-11-25 18:35:34,438 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2022-11-25 18:35:34,438 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 817 transitions, 12420 flow [2022-11-25 18:35:34,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 106.0) internal successors, (2968), 28 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:34,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:34,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:34,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:35:34,639 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:35:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -849874701, now seen corresponding path program 13 times [2022-11-25 18:35:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:34,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583267357] [2022-11-25 18:35:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583267357] [2022-11-25 18:35:35,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583267357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149195279] [2022-11-25 18:35:35,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:35:35,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:35,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:35,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c3b0fd5-b14d-43b8-ab2f-82d0b7d41908/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:35:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:35:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:36,137 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 60 treesize of output 36 [2022-11-25 18:35:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:36,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:36,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:36,706 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 103 treesize of output 73 [2022-11-25 18:35:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:37,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149195279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:37,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:37,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2022-11-25 18:35:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249329908] [2022-11-25 18:35:37,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:37,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:35:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:35:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:35:38,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 291 [2022-11-25 18:35:38,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 817 transitions, 12420 flow. Second operand has 19 states, 19 states have (on average 114.52631578947368) internal successors, (2176), 19 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:38,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:38,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 291 [2022-11-25 18:35:38,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand