./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:22:19,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:22:19,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:22:19,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:22:19,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:22:19,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:22:19,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:22:19,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:22:19,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:22:19,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:22:19,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:22:19,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:22:19,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:22:19,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:22:19,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:22:19,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:22:19,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:22:19,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:22:19,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:22:19,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:22:19,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:22:19,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:22:19,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:22:19,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:22:19,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:22:19,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:22:19,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:22:19,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:22:19,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:22:19,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:22:19,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:22:19,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:22:19,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:22:19,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:22:19,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:22:19,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:22:19,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:22:19,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:22:19,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:22:19,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:22:19,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:22:19,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:22:19,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:22:19,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:22:19,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:22:19,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:22:19,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:22:19,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:22:19,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:22:19,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:22:19,139 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:22:19,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:22:19,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:22:19,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:22:19,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:22:19,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:22:19,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:22:19,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:22:19,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:22:19,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:22:19,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:22:19,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:22:19,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:22:19,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:22:19,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:22:19,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:22:19,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:22:19,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:22:19,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:22:19,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:22:19,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:22:19,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:22:19,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:22:19,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:22:19,144 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:22:19,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:22:19,144 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:22:19,144 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_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2022-12-13 22:22:19,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:22:19,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:22:19,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:22:19,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:22:19,357 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:22:19,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2022-12-13 22:22:21,933 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:22:22,130 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:22:22,131 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2022-12-13 22:22:22,138 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/data/a128ffc0d/557a4864ee6a4815839aea0842d78799/FLAGef79d3732 [2022-12-13 22:22:22,499 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/data/a128ffc0d/557a4864ee6a4815839aea0842d78799 [2022-12-13 22:22:22,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:22:22,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:22:22,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:22:22,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:22:22,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:22:22,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c3e30e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22, skipping insertion in model container [2022-12-13 22:22:22,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:22:22,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:22:22,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,656 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,664 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,664 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,666 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,676 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,677 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,678 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,679 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,680 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,681 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,691 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_f8c7bd31-b389-4211-87e8-b2a3a869d391/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2022-12-13 22:22:22,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:22:22,704 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:22:22,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,716 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,716 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,717 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,717 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,719 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,720 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,720 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,721 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,722 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,724 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,725 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,726 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,726 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,727 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,728 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:22,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:22,737 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_f8c7bd31-b389-4211-87e8-b2a3a869d391/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2022-12-13 22:22:22,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:22:22,752 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:22:22,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22 WrapperNode [2022-12-13 22:22:22,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:22:22,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:22:22,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:22:22,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:22:22,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,792 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 460 [2022-12-13 22:22:22,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:22:22,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:22:22,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:22:22,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:22:22,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:22:22,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:22:22,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:22:22,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:22:22,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (1/1) ... [2022-12-13 22:22:22,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:22:22,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:22,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:22:22,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:22:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:22:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:22:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:22:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:22:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 22:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 22:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 22:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 22:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:22:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:22:22,886 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:22:22,971 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:22:22,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:22:23,378 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:22:23,512 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:22:23,512 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-13 22:22:23,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:22:23 BoogieIcfgContainer [2022-12-13 22:22:23,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:22:23,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:22:23,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:22:23,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:22:23,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:22:22" (1/3) ... [2022-12-13 22:22:23,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ae3b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:22:23, skipping insertion in model container [2022-12-13 22:22:23,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:22" (2/3) ... [2022-12-13 22:22:23,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ae3b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:22:23, skipping insertion in model container [2022-12-13 22:22:23,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:22:23" (3/3) ... [2022-12-13 22:22:23,520 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2022-12-13 22:22:23,526 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 22:22:23,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:22:23,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:22:23,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:22:23,587 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 22:22:23,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 356 transitions, 744 flow [2022-12-13 22:22:23,693 INFO L130 PetriNetUnfolder]: 37/352 cut-off events. [2022-12-13 22:22:23,693 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 22:22:23,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 352 events. 37/352 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 241 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 308. Up to 8 conditions per place. [2022-12-13 22:22:23,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 356 transitions, 744 flow [2022-12-13 22:22:23,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 339 transitions, 702 flow [2022-12-13 22:22:23,705 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:22:23,712 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 339 transitions, 702 flow [2022-12-13 22:22:23,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 339 transitions, 702 flow [2022-12-13 22:22:23,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 339 transitions, 702 flow [2022-12-13 22:22:23,776 INFO L130 PetriNetUnfolder]: 37/339 cut-off events. [2022-12-13 22:22:23,776 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 22:22:23,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 339 events. 37/339 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 240 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 308. Up to 8 conditions per place. [2022-12-13 22:22:23,780 INFO L119 LiptonReduction]: Number of co-enabled transitions 5184 [2022-12-13 22:22:35,505 INFO L134 LiptonReduction]: Checked pairs total: 5084 [2022-12-13 22:22:35,505 INFO L136 LiptonReduction]: Total number of compositions: 371 [2022-12-13 22:22:35,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:22:35,519 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;@4a02efd1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:22:35,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 22:22:35,526 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2022-12-13 22:22:35,526 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 22:22:35,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:35,527 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, 1, 1] [2022-12-13 22:22:35,527 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 2 more)] === [2022-12-13 22:22:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1453804266, now seen corresponding path program 1 times [2022-12-13 22:22:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:35,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378261478] [2022-12-13 22:22:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:35,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:35,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:35,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378261478] [2022-12-13 22:22:35,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378261478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:35,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:35,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:22:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794037727] [2022-12-13 22:22:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:36,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:36,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:36,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 727 [2022-12-13 22:22:36,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:36,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:36,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 727 [2022-12-13 22:22:36,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:36,290 INFO L130 PetriNetUnfolder]: 501/685 cut-off events. [2022-12-13 22:22:36,290 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-13 22:22:36,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 685 events. 501/685 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1784 event pairs, 117 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2022-12-13 22:22:36,296 INFO L137 encePairwiseOnDemand]: 721/727 looper letters, 49 selfloop transitions, 5 changer transitions 1/55 dead transitions. [2022-12-13 22:22:36,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 265 flow [2022-12-13 22:22:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1004 transitions. [2022-12-13 22:22:36,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603392939018799 [2022-12-13 22:22:36,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1004 transitions. [2022-12-13 22:22:36,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1004 transitions. [2022-12-13 22:22:36,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:36,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1004 transitions. [2022-12-13 22:22:36,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:36,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 727.0) internal successors, (2908), 4 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:36,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 727.0) internal successors, (2908), 4 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:36,336 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 90 flow. Second operand 3 states and 1004 transitions. [2022-12-13 22:22:36,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 265 flow [2022-12-13 22:22:36,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 22:22:36,341 INFO L231 Difference]: Finished difference. Result has 33 places, 37 transitions, 107 flow [2022-12-13 22:22:36,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=33, PETRI_TRANSITIONS=37} [2022-12-13 22:22:36,346 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2022-12-13 22:22:36,346 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 107 flow [2022-12-13 22:22:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:36,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:36,347 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, 1, 1, 1] [2022-12-13 22:22:36,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:22:36,348 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 2 more)] === [2022-12-13 22:22:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:36,348 INFO L85 PathProgramCache]: Analyzing trace with hash 126314745, now seen corresponding path program 1 times [2022-12-13 22:22:36,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:36,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929613299] [2022-12-13 22:22:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:37,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929613299] [2022-12-13 22:22:37,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929613299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:37,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:37,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:22:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063684855] [2022-12-13 22:22:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:22:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:22:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:22:37,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 727 [2022-12-13 22:22:37,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 37 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 297.2) internal successors, (1486), 5 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:37,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:37,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 727 [2022-12-13 22:22:37,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:37,734 INFO L130 PetriNetUnfolder]: 1161/1607 cut-off events. [2022-12-13 22:22:37,734 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-12-13 22:22:37,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 1607 events. 1161/1607 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5152 event pairs, 522 based on Foata normal form. 68/1667 useless extension candidates. Maximal degree in co-relation 886. Up to 722 conditions per place. [2022-12-13 22:22:37,740 INFO L137 encePairwiseOnDemand]: 721/727 looper letters, 87 selfloop transitions, 7 changer transitions 0/94 dead transitions. [2022-12-13 22:22:37,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 94 transitions, 451 flow [2022-12-13 22:22:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:22:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:22:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1548 transitions. [2022-12-13 22:22:37,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42585969738651996 [2022-12-13 22:22:37,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1548 transitions. [2022-12-13 22:22:37,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1548 transitions. [2022-12-13 22:22:37,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:37,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1548 transitions. [2022-12-13 22:22:37,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 309.6) internal successors, (1548), 5 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:37,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 727.0) internal successors, (4362), 6 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:37,752 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 727.0) internal successors, (4362), 6 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:37,752 INFO L175 Difference]: Start difference. First operand has 33 places, 37 transitions, 107 flow. Second operand 5 states and 1548 transitions. [2022-12-13 22:22:37,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 94 transitions, 451 flow [2022-12-13 22:22:37,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 94 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:37,754 INFO L231 Difference]: Finished difference. Result has 39 places, 43 transitions, 161 flow [2022-12-13 22:22:37,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=39, PETRI_TRANSITIONS=43} [2022-12-13 22:22:37,755 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2022-12-13 22:22:37,755 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 43 transitions, 161 flow [2022-12-13 22:22:37,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 297.2) internal successors, (1486), 5 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:37,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:37,756 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, 1, 1, 1] [2022-12-13 22:22:37,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:22:37,757 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 2 more)] === [2022-12-13 22:22:37,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:37,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1599532015, now seen corresponding path program 1 times [2022-12-13 22:22:37,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:37,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177560617] [2022-12-13 22:22:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:37,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:38,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:38,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177560617] [2022-12-13 22:22:38,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177560617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:38,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:38,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:22:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148048240] [2022-12-13 22:22:38,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:38,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:22:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:22:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:22:38,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 727 [2022-12-13 22:22:38,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 43 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 287.2) internal successors, (1436), 5 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:38,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:38,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 727 [2022-12-13 22:22:38,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:39,261 INFO L130 PetriNetUnfolder]: 1483/2099 cut-off events. [2022-12-13 22:22:39,262 INFO L131 PetriNetUnfolder]: For 1249/1249 co-relation queries the response was YES. [2022-12-13 22:22:39,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5296 conditions, 2099 events. 1483/2099 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7685 event pairs, 504 based on Foata normal form. 120/2210 useless extension candidates. Maximal degree in co-relation 2804. Up to 1247 conditions per place. [2022-12-13 22:22:39,274 INFO L137 encePairwiseOnDemand]: 715/727 looper letters, 69 selfloop transitions, 15 changer transitions 2/86 dead transitions. [2022-12-13 22:22:39,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 86 transitions, 437 flow [2022-12-13 22:22:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1212 transitions. [2022-12-13 22:22:39,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167812929848693 [2022-12-13 22:22:39,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1212 transitions. [2022-12-13 22:22:39,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1212 transitions. [2022-12-13 22:22:39,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:39,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1212 transitions. [2022-12-13 22:22:39,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:39,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:39,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:39,290 INFO L175 Difference]: Start difference. First operand has 39 places, 43 transitions, 161 flow. Second operand 4 states and 1212 transitions. [2022-12-13 22:22:39,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 86 transitions, 437 flow [2022-12-13 22:22:39,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 86 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:39,293 INFO L231 Difference]: Finished difference. Result has 43 places, 50 transitions, 239 flow [2022-12-13 22:22:39,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=43, PETRI_TRANSITIONS=50} [2022-12-13 22:22:39,294 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2022-12-13 22:22:39,294 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 50 transitions, 239 flow [2022-12-13 22:22:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 287.2) internal successors, (1436), 5 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:39,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:39,295 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, 1, 1, 1] [2022-12-13 22:22:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:22:39,296 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 2 more)] === [2022-12-13 22:22:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 5660838, now seen corresponding path program 1 times [2022-12-13 22:22:39,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:39,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329849385] [2022-12-13 22:22:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:39,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:39,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329849385] [2022-12-13 22:22:39,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329849385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:39,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:39,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:22:39,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054939330] [2022-12-13 22:22:39,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:39,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:39,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:22:39,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 727 [2022-12-13 22:22:39,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:39,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:39,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 727 [2022-12-13 22:22:39,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:40,290 INFO L130 PetriNetUnfolder]: 1839/2649 cut-off events. [2022-12-13 22:22:40,291 INFO L131 PetriNetUnfolder]: For 2183/2183 co-relation queries the response was YES. [2022-12-13 22:22:40,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2649 events. 1839/2649 cut-off events. For 2183/2183 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10330 event pairs, 730 based on Foata normal form. 208/2857 useless extension candidates. Maximal degree in co-relation 4156. Up to 1485 conditions per place. [2022-12-13 22:22:40,303 INFO L137 encePairwiseOnDemand]: 724/727 looper letters, 84 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2022-12-13 22:22:40,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 526 flow [2022-12-13 22:22:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1313 transitions. [2022-12-13 22:22:40,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4515130674002751 [2022-12-13 22:22:40,306 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1313 transitions. [2022-12-13 22:22:40,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1313 transitions. [2022-12-13 22:22:40,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:40,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1313 transitions. [2022-12-13 22:22:40,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 328.25) internal successors, (1313), 4 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,314 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,315 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 239 flow. Second operand 4 states and 1313 transitions. [2022-12-13 22:22:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 526 flow [2022-12-13 22:22:40,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 88 transitions, 516 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:40,318 INFO L231 Difference]: Finished difference. Result has 46 places, 50 transitions, 245 flow [2022-12-13 22:22:40,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=46, PETRI_TRANSITIONS=50} [2022-12-13 22:22:40,318 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2022-12-13 22:22:40,319 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 50 transitions, 245 flow [2022-12-13 22:22:40,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:40,319 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, 1, 1, 1] [2022-12-13 22:22:40,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:22:40,320 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 2 more)] === [2022-12-13 22:22:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1995095108, now seen corresponding path program 1 times [2022-12-13 22:22:40,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:40,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801988814] [2022-12-13 22:22:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801988814] [2022-12-13 22:22:40,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801988814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:40,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:40,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:22:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138580738] [2022-12-13 22:22:40,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:22:40,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 727 [2022-12-13 22:22:40,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 304.5) internal successors, (1218), 4 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:40,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 727 [2022-12-13 22:22:40,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:40,924 INFO L130 PetriNetUnfolder]: 1291/1915 cut-off events. [2022-12-13 22:22:40,924 INFO L131 PetriNetUnfolder]: For 1706/1706 co-relation queries the response was YES. [2022-12-13 22:22:40,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5205 conditions, 1915 events. 1291/1915 cut-off events. For 1706/1706 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7168 event pairs, 902 based on Foata normal form. 60/1975 useless extension candidates. Maximal degree in co-relation 4276. Up to 1490 conditions per place. [2022-12-13 22:22:40,930 INFO L137 encePairwiseOnDemand]: 723/727 looper letters, 43 selfloop transitions, 2 changer transitions 31/76 dead transitions. [2022-12-13 22:22:40,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 467 flow [2022-12-13 22:22:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1253 transitions. [2022-12-13 22:22:40,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43088033012379645 [2022-12-13 22:22:40,933 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1253 transitions. [2022-12-13 22:22:40,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1253 transitions. [2022-12-13 22:22:40,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:40,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1253 transitions. [2022-12-13 22:22:40,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,939 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 245 flow. Second operand 4 states and 1253 transitions. [2022-12-13 22:22:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 467 flow [2022-12-13 22:22:40,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 457 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:40,942 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 201 flow [2022-12-13 22:22:40,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-12-13 22:22:40,943 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2022-12-13 22:22:40,943 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 201 flow [2022-12-13 22:22:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 304.5) internal successors, (1218), 4 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:40,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:40,943 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, 1, 1, 1, 1] [2022-12-13 22:22:40,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:22:40,944 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 2 more)] === [2022-12-13 22:22:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash 23212929, now seen corresponding path program 1 times [2022-12-13 22:22:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:40,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852272100] [2022-12-13 22:22:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:40,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:41,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852272100] [2022-12-13 22:22:41,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852272100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:41,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:41,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:22:41,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22780746] [2022-12-13 22:22:41,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:41,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:41,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:22:41,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 727 [2022-12-13 22:22:41,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:41,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:41,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 727 [2022-12-13 22:22:41,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:41,537 INFO L130 PetriNetUnfolder]: 1148/1646 cut-off events. [2022-12-13 22:22:41,537 INFO L131 PetriNetUnfolder]: For 1086/1086 co-relation queries the response was YES. [2022-12-13 22:22:41,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4249 conditions, 1646 events. 1148/1646 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5595 event pairs, 386 based on Foata normal form. 96/1742 useless extension candidates. Maximal degree in co-relation 4237. Up to 662 conditions per place. [2022-12-13 22:22:41,542 INFO L137 encePairwiseOnDemand]: 724/727 looper letters, 72 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2022-12-13 22:22:41,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 433 flow [2022-12-13 22:22:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1306 transitions. [2022-12-13 22:22:41,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44910591471801925 [2022-12-13 22:22:41,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1306 transitions. [2022-12-13 22:22:41,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1306 transitions. [2022-12-13 22:22:41,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:41,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1306 transitions. [2022-12-13 22:22:41,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.5) internal successors, (1306), 4 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:41,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:41,551 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:41,551 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 201 flow. Second operand 4 states and 1306 transitions. [2022-12-13 22:22:41,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 433 flow [2022-12-13 22:22:41,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 421 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 22:22:41,554 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 193 flow [2022-12-13 22:22:41,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-12-13 22:22:41,555 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2022-12-13 22:22:41,555 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 193 flow [2022-12-13 22:22:41,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:41,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:41,556 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, 1, 1, 1, 1] [2022-12-13 22:22:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 22:22:41,556 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 2 more)] === [2022-12-13 22:22:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash 711122500, now seen corresponding path program 1 times [2022-12-13 22:22:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:41,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301100489] [2022-12-13 22:22:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:41,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301100489] [2022-12-13 22:22:41,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301100489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892342214] [2022-12-13 22:22:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:41,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:41,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:41,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:41,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:22:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 22:22:41,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892342214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:42,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:42,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 22:22:42,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208740064] [2022-12-13 22:22:42,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:22:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:22:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:22:42,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 727 [2022-12-13 22:22:42,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 322.125) internal successors, (2577), 8 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:42,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:42,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 727 [2022-12-13 22:22:42,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:42,690 INFO L130 PetriNetUnfolder]: 1276/1835 cut-off events. [2022-12-13 22:22:42,690 INFO L131 PetriNetUnfolder]: For 1224/1224 co-relation queries the response was YES. [2022-12-13 22:22:42,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4898 conditions, 1835 events. 1276/1835 cut-off events. For 1224/1224 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6625 event pairs, 394 based on Foata normal form. 1/1836 useless extension candidates. Maximal degree in co-relation 4886. Up to 1205 conditions per place. [2022-12-13 22:22:42,697 INFO L137 encePairwiseOnDemand]: 723/727 looper letters, 62 selfloop transitions, 5 changer transitions 3/70 dead transitions. [2022-12-13 22:22:42,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 405 flow [2022-12-13 22:22:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1309 transitions. [2022-12-13 22:22:42,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4501375515818432 [2022-12-13 22:22:42,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1309 transitions. [2022-12-13 22:22:42,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1309 transitions. [2022-12-13 22:22:42,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:42,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1309 transitions. [2022-12-13 22:22:42,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:42,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:42,706 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:42,707 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 193 flow. Second operand 4 states and 1309 transitions. [2022-12-13 22:22:42,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 405 flow [2022-12-13 22:22:42,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:42,709 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 224 flow [2022-12-13 22:22:42,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-12-13 22:22:42,709 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2022-12-13 22:22:42,709 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 224 flow [2022-12-13 22:22:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 322.125) internal successors, (2577), 8 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:42,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:42,710 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:42,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:22:42,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:42,912 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 2 more)] === [2022-12-13 22:22:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash 964874380, now seen corresponding path program 2 times [2022-12-13 22:22:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:42,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767148391] [2022-12-13 22:22:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:43,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767148391] [2022-12-13 22:22:43,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767148391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620300546] [2022-12-13 22:22:43,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:22:43,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:43,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:22:43,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:22:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 22:22:43,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:43,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:43,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:22:43,809 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 273 treesize of output 283 [2022-12-13 22:22:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:22:44,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620300546] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:44,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:44,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-12-13 22:22:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185427503] [2022-12-13 22:22:44,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:44,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 22:22:44,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 22:22:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-13 22:22:44,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 727 [2022-12-13 22:22:44,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 224 flow. Second operand has 12 states, 12 states have (on average 273.3333333333333) internal successors, (3280), 12 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:44,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:44,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 727 [2022-12-13 22:22:44,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:45,407 INFO L130 PetriNetUnfolder]: 2112/3102 cut-off events. [2022-12-13 22:22:45,407 INFO L131 PetriNetUnfolder]: For 2744/2744 co-relation queries the response was YES. [2022-12-13 22:22:45,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 3102 events. 2112/3102 cut-off events. For 2744/2744 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13084 event pairs, 526 based on Foata normal form. 180/3282 useless extension candidates. Maximal degree in co-relation 8434. Up to 1032 conditions per place. [2022-12-13 22:22:45,415 INFO L137 encePairwiseOnDemand]: 715/727 looper letters, 96 selfloop transitions, 16 changer transitions 27/139 dead transitions. [2022-12-13 22:22:45,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 139 transitions, 786 flow [2022-12-13 22:22:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:22:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 22:22:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2534 transitions. [2022-12-13 22:22:45,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38728412043405164 [2022-12-13 22:22:45,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2534 transitions. [2022-12-13 22:22:45,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2534 transitions. [2022-12-13 22:22:45,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:45,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2534 transitions. [2022-12-13 22:22:45,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.55555555555554) internal successors, (2534), 9 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:45,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 727.0) internal successors, (7270), 10 states have internal predecessors, (7270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:45,428 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 727.0) internal successors, (7270), 10 states have internal predecessors, (7270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:45,428 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 224 flow. Second operand 9 states and 2534 transitions. [2022-12-13 22:22:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 139 transitions, 786 flow [2022-12-13 22:22:45,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 139 transitions, 771 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 22:22:45,432 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 328 flow [2022-12-13 22:22:45,432 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=328, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2022-12-13 22:22:45,433 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2022-12-13 22:22:45,433 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 328 flow [2022-12-13 22:22:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 273.3333333333333) internal successors, (3280), 12 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:45,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:45,434 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, 1, 1, 1, 1, 1] [2022-12-13 22:22:45,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:22:45,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 22:22:45,636 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 2 more)] === [2022-12-13 22:22:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash 180782257, now seen corresponding path program 1 times [2022-12-13 22:22:45,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:45,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539893513] [2022-12-13 22:22:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:46,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539893513] [2022-12-13 22:22:46,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539893513] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:46,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755221861] [2022-12-13 22:22:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:46,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:46,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:46,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:46,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:22:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 22:22:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:46,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:22:46,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 22:22:46,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 22:22:46,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 22:22:47,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 22:22:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:47,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:53,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:22:53,120 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 67 treesize of output 56 [2022-12-13 22:22:53,135 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-13 22:22:53,135 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 1606 treesize of output 1549 [2022-12-13 22:22:53,155 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 22:22:53,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1542 treesize of output 1350 [2022-12-13 22:22:53,171 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 22:22:53,171 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 1350 treesize of output 1254 [2022-12-13 22:22:53,186 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 22:22:53,186 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 1254 treesize of output 870 [2022-12-13 22:22:53,202 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 22:22:53,203 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 458 treesize of output 410 [2022-12-13 22:22:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755221861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:53,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:53,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 25 [2022-12-13 22:22:53,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126621629] [2022-12-13 22:22:53,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:53,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 22:22:53,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:53,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 22:22:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=516, Unknown=18, NotChecked=0, Total=702 [2022-12-13 22:22:55,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 727 [2022-12-13 22:22:55,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 328 flow. Second operand has 27 states, 27 states have (on average 203.11111111111111) internal successors, (5484), 27 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:55,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:55,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 727 [2022-12-13 22:22:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:05,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:07,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:09,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:12,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:14,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:16,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:18,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:20,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:23,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:25,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:27,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:27,443 INFO L130 PetriNetUnfolder]: 4178/6272 cut-off events. [2022-12-13 22:23:27,444 INFO L131 PetriNetUnfolder]: For 8656/8656 co-relation queries the response was YES. [2022-12-13 22:23:27,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18479 conditions, 6272 events. 4178/6272 cut-off events. For 8656/8656 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32013 event pairs, 1170 based on Foata normal form. 5/6277 useless extension candidates. Maximal degree in co-relation 18462. Up to 2641 conditions per place. [2022-12-13 22:23:27,461 INFO L137 encePairwiseOnDemand]: 706/727 looper letters, 160 selfloop transitions, 62 changer transitions 99/321 dead transitions. [2022-12-13 22:23:27,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 321 transitions, 1945 flow [2022-12-13 22:23:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 22:23:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 22:23:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6497 transitions. [2022-12-13 22:23:27,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28828149265652037 [2022-12-13 22:23:27,470 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6497 transitions. [2022-12-13 22:23:27,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6497 transitions. [2022-12-13 22:23:27,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:27,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6497 transitions. [2022-12-13 22:23:27,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 209.58064516129033) internal successors, (6497), 31 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:27,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 727.0) internal successors, (23264), 32 states have internal predecessors, (23264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:27,491 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 727.0) internal successors, (23264), 32 states have internal predecessors, (23264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:27,491 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 328 flow. Second operand 31 states and 6497 transitions. [2022-12-13 22:23:27,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 321 transitions, 1945 flow [2022-12-13 22:23:27,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 321 transitions, 1928 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 22:23:27,502 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 1022 flow [2022-12-13 22:23:27,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1022, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2022-12-13 22:23:27,503 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2022-12-13 22:23:27,503 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 1022 flow [2022-12-13 22:23:27,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 203.11111111111111) internal successors, (5484), 27 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:27,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:27,504 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:23:27,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:23:27,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 22:23:27,705 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 2 more)] === [2022-12-13 22:23:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash -978674939, now seen corresponding path program 2 times [2022-12-13 22:23:27,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:23:27,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638371239] [2022-12-13 22:23:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:23:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:28,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:23:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638371239] [2022-12-13 22:23:28,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638371239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:23:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760921259] [2022-12-13 22:23:28,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:23:28,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:23:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:23:28,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:23:28,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:23:28,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:23:28,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:23:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 22:23:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:23:28,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:29,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:23:29,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 416 treesize of output 607 [2022-12-13 22:23:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:23:34,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760921259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:34,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:23:34,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 3] total 14 [2022-12-13 22:23:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432532293] [2022-12-13 22:23:34,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 22:23:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:23:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 22:23:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-13 22:23:35,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 727 [2022-12-13 22:23:35,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 1022 flow. Second operand has 16 states, 16 states have (on average 265.375) internal successors, (4246), 16 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:35,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:35,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 727 [2022-12-13 22:23:35,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:37,866 INFO L130 PetriNetUnfolder]: 5710/8590 cut-off events. [2022-12-13 22:23:37,866 INFO L131 PetriNetUnfolder]: For 26723/26723 co-relation queries the response was YES. [2022-12-13 22:23:37,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32762 conditions, 8590 events. 5710/8590 cut-off events. For 26723/26723 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46774 event pairs, 1732 based on Foata normal form. 4/8594 useless extension candidates. Maximal degree in co-relation 32726. Up to 2469 conditions per place. [2022-12-13 22:23:37,896 INFO L137 encePairwiseOnDemand]: 714/727 looper letters, 122 selfloop transitions, 83 changer transitions 54/259 dead transitions. [2022-12-13 22:23:37,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 259 transitions, 2293 flow [2022-12-13 22:23:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 22:23:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 22:23:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3569 transitions. [2022-12-13 22:23:37,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3776319966141149 [2022-12-13 22:23:37,901 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3569 transitions. [2022-12-13 22:23:37,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3569 transitions. [2022-12-13 22:23:37,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:37,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3569 transitions. [2022-12-13 22:23:37,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 274.53846153846155) internal successors, (3569), 13 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:37,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 727.0) internal successors, (10178), 14 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:37,912 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 727.0) internal successors, (10178), 14 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:37,912 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 1022 flow. Second operand 13 states and 3569 transitions. [2022-12-13 22:23:37,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 259 transitions, 2293 flow [2022-12-13 22:23:37,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 259 transitions, 2209 flow, removed 40 selfloop flow, removed 3 redundant places. [2022-12-13 22:23:37,955 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 1456 flow [2022-12-13 22:23:37,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1456, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2022-12-13 22:23:37,955 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2022-12-13 22:23:37,955 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 1456 flow [2022-12-13 22:23:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.375) internal successors, (4246), 16 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:37,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:37,956 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, 1, 1, 1, 1, 1, 1] [2022-12-13 22:23:37,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:23:38,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 22:23:38,157 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 2 more)] === [2022-12-13 22:23:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1584548215, now seen corresponding path program 1 times [2022-12-13 22:23:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:23:38,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059942147] [2022-12-13 22:23:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:23:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:39,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:23:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059942147] [2022-12-13 22:23:39,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059942147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:23:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620885072] [2022-12-13 22:23:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:39,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:23:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:23:39,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:23:39,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:23:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:39,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:23:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:23:39,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:40,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:23:40,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 810 treesize of output 889 [2022-12-13 22:23:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:23:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620885072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:41,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:23:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2022-12-13 22:23:41,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496402338] [2022-12-13 22:23:41,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:23:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:23:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:23:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:23:42,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 727 [2022-12-13 22:23:42,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 1456 flow. Second operand has 15 states, 15 states have (on average 258.1333333333333) internal successors, (3872), 15 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:42,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:42,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 727 [2022-12-13 22:23:42,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:45,100 INFO L130 PetriNetUnfolder]: 6506/9880 cut-off events. [2022-12-13 22:23:45,100 INFO L131 PetriNetUnfolder]: For 40881/40881 co-relation queries the response was YES. [2022-12-13 22:23:45,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38149 conditions, 9880 events. 6506/9880 cut-off events. For 40881/40881 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 55686 event pairs, 2628 based on Foata normal form. 420/10300 useless extension candidates. Maximal degree in co-relation 38112. Up to 3720 conditions per place. [2022-12-13 22:23:45,141 INFO L137 encePairwiseOnDemand]: 717/727 looper letters, 172 selfloop transitions, 40 changer transitions 35/247 dead transitions. [2022-12-13 22:23:45,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 247 transitions, 2410 flow [2022-12-13 22:23:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 22:23:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 22:23:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3197 transitions. [2022-12-13 22:23:45,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36646033929390187 [2022-12-13 22:23:45,148 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3197 transitions. [2022-12-13 22:23:45,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3197 transitions. [2022-12-13 22:23:45,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:45,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3197 transitions. [2022-12-13 22:23:45,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 266.4166666666667) internal successors, (3197), 12 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:45,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 727.0) internal successors, (9451), 13 states have internal predecessors, (9451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:45,162 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 727.0) internal successors, (9451), 13 states have internal predecessors, (9451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:45,162 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 1456 flow. Second operand 12 states and 3197 transitions. [2022-12-13 22:23:45,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 247 transitions, 2410 flow [2022-12-13 22:23:45,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 247 transitions, 2199 flow, removed 41 selfloop flow, removed 8 redundant places. [2022-12-13 22:23:45,265 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1373 flow [2022-12-13 22:23:45,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1373, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2022-12-13 22:23:45,266 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2022-12-13 22:23:45,266 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1373 flow [2022-12-13 22:23:45,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 258.1333333333333) internal successors, (3872), 15 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:45,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:45,267 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, 1, 1, 1, 1, 1, 1] [2022-12-13 22:23:45,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:23:45,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 22:23:45,468 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 2 more)] === [2022-12-13 22:23:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:45,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2004544056, now seen corresponding path program 1 times [2022-12-13 22:23:45,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:23:45,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105842192] [2022-12-13 22:23:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:23:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:23:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:23:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105842192] [2022-12-13 22:23:45,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105842192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:23:45,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:23:45,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:23:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298255069] [2022-12-13 22:23:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:23:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:23:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:23:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:23:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:23:45,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 727 [2022-12-13 22:23:45,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1373 flow. Second operand has 5 states, 5 states have (on average 301.8) internal successors, (1509), 5 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:45,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:45,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 727 [2022-12-13 22:23:45,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:48,990 INFO L130 PetriNetUnfolder]: 10607/16330 cut-off events. [2022-12-13 22:23:48,990 INFO L131 PetriNetUnfolder]: For 55320/55320 co-relation queries the response was YES. [2022-12-13 22:23:49,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 16330 events. 10607/16330 cut-off events. For 55320/55320 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 102750 event pairs, 7985 based on Foata normal form. 360/16690 useless extension candidates. Maximal degree in co-relation 60671. Up to 7551 conditions per place. [2022-12-13 22:23:49,045 INFO L137 encePairwiseOnDemand]: 722/727 looper letters, 193 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2022-12-13 22:23:49,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 217 transitions, 2573 flow [2022-12-13 22:23:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:23:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:23:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1558 transitions. [2022-12-13 22:23:49,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42861072902338376 [2022-12-13 22:23:49,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1558 transitions. [2022-12-13 22:23:49,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1558 transitions. [2022-12-13 22:23:49,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:49,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1558 transitions. [2022-12-13 22:23:49,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:49,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 727.0) internal successors, (4362), 6 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:49,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 727.0) internal successors, (4362), 6 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:49,051 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1373 flow. Second operand 5 states and 1558 transitions. [2022-12-13 22:23:49,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 217 transitions, 2573 flow [2022-12-13 22:23:49,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 2509 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-12-13 22:23:49,211 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 1367 flow [2022-12-13 22:23:49,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1367, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2022-12-13 22:23:49,212 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 86 predicate places. [2022-12-13 22:23:49,212 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 1367 flow [2022-12-13 22:23:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.8) internal successors, (1509), 5 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:49,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:49,212 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:23:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 22:23:49,212 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 2 more)] === [2022-12-13 22:23:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1126257175, now seen corresponding path program 1 times [2022-12-13 22:23:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:23:49,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959695255] [2022-12-13 22:23:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:23:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:23:49,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:23:49,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959695255] [2022-12-13 22:23:49,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959695255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:23:49,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900963585] [2022-12-13 22:23:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:49,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:23:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:23:49,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:23:49,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:23:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:23:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:23:49,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:51,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:23:51,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 450 treesize of output 655 [2022-12-13 22:23:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:23:53,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900963585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:53,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:23:53,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 22:23:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568990716] [2022-12-13 22:23:53,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:53,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 22:23:53,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:23:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 22:23:53,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 22:23:54,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 727 [2022-12-13 22:23:54,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 1367 flow. Second operand has 12 states, 12 states have (on average 280.75) internal successors, (3369), 12 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:54,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:54,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 727 [2022-12-13 22:23:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:58,278 INFO L130 PetriNetUnfolder]: 11631/17850 cut-off events. [2022-12-13 22:23:58,279 INFO L131 PetriNetUnfolder]: For 57245/57245 co-relation queries the response was YES. [2022-12-13 22:23:58,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65937 conditions, 17850 events. 11631/17850 cut-off events. For 57245/57245 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 112723 event pairs, 3471 based on Foata normal form. 300/18150 useless extension candidates. Maximal degree in co-relation 65896. Up to 5333 conditions per place. [2022-12-13 22:23:58,351 INFO L137 encePairwiseOnDemand]: 723/727 looper letters, 152 selfloop transitions, 42 changer transitions 22/216 dead transitions. [2022-12-13 22:23:58,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 216 transitions, 2141 flow [2022-12-13 22:23:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:23:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:23:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2331 transitions. [2022-12-13 22:23:58,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40079092159559837 [2022-12-13 22:23:58,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2331 transitions. [2022-12-13 22:23:58,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2331 transitions. [2022-12-13 22:23:58,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:58,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2331 transitions. [2022-12-13 22:23:58,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 291.375) internal successors, (2331), 8 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:58,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 727.0) internal successors, (6543), 9 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:58,362 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 727.0) internal successors, (6543), 9 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:58,362 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 1367 flow. Second operand 8 states and 2331 transitions. [2022-12-13 22:23:58,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 216 transitions, 2141 flow [2022-12-13 22:23:58,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 216 transitions, 2102 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-13 22:23:58,561 INFO L231 Difference]: Finished difference. Result has 132 places, 133 transitions, 1440 flow [2022-12-13 22:23:58,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=132, PETRI_TRANSITIONS=133} [2022-12-13 22:23:58,562 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 94 predicate places. [2022-12-13 22:23:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 133 transitions, 1440 flow [2022-12-13 22:23:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 280.75) internal successors, (3369), 12 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:58,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:58,563 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:23:58,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:23:58,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:23:58,764 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 2 more)] === [2022-12-13 22:23:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash -612636195, now seen corresponding path program 3 times [2022-12-13 22:23:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:23:58,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270463379] [2022-12-13 22:23:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:58,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:23:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:23:59,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:23:59,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270463379] [2022-12-13 22:23:59,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270463379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:23:59,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147876005] [2022-12-13 22:23:59,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:23:59,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:23:59,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:23:59,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:23:59,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:24:00,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:24:00,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:24:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:24:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:00,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:24:01,544 INFO L321 Elim1Store]: treesize reduction 114, result has 69.9 percent of original size [2022-12-13 22:24:01,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 902 treesize of output 1046 [2022-12-13 22:24:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:04,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147876005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:24:04,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:24:04,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 15 [2022-12-13 22:24:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622118440] [2022-12-13 22:24:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:24:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 22:24:04,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 22:24:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-13 22:24:05,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 727 [2022-12-13 22:24:05,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 133 transitions, 1440 flow. Second operand has 16 states, 16 states have (on average 247.3125) internal successors, (3957), 16 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:05,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:05,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 727 [2022-12-13 22:24:05,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:09,564 INFO L130 PetriNetUnfolder]: 10531/16352 cut-off events. [2022-12-13 22:24:09,564 INFO L131 PetriNetUnfolder]: For 64432/64432 co-relation queries the response was YES. [2022-12-13 22:24:09,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62011 conditions, 16352 events. 10531/16352 cut-off events. For 64432/64432 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 104151 event pairs, 3491 based on Foata normal form. 112/16464 useless extension candidates. Maximal degree in co-relation 61967. Up to 4829 conditions per place. [2022-12-13 22:24:09,622 INFO L137 encePairwiseOnDemand]: 716/727 looper letters, 87 selfloop transitions, 45 changer transitions 191/323 dead transitions. [2022-12-13 22:24:09,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 323 transitions, 3131 flow [2022-12-13 22:24:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 22:24:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 22:24:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4586 transitions. [2022-12-13 22:24:09,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35045086351826377 [2022-12-13 22:24:09,626 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4586 transitions. [2022-12-13 22:24:09,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4586 transitions. [2022-12-13 22:24:09,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:09,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4586 transitions. [2022-12-13 22:24:09,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 254.77777777777777) internal successors, (4586), 18 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:09,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 727.0) internal successors, (13813), 19 states have internal predecessors, (13813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:09,637 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 727.0) internal successors, (13813), 19 states have internal predecessors, (13813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:09,637 INFO L175 Difference]: Start difference. First operand has 132 places, 133 transitions, 1440 flow. Second operand 18 states and 4586 transitions. [2022-12-13 22:24:09,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 323 transitions, 3131 flow [2022-12-13 22:24:09,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 323 transitions, 2957 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-12-13 22:24:09,916 INFO L231 Difference]: Finished difference. Result has 144 places, 111 transitions, 1235 flow [2022-12-13 22:24:09,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1235, PETRI_PLACES=144, PETRI_TRANSITIONS=111} [2022-12-13 22:24:09,917 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2022-12-13 22:24:09,917 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 111 transitions, 1235 flow [2022-12-13 22:24:09,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 247.3125) internal successors, (3957), 16 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:09,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:09,917 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:24:09,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:24:10,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:10,119 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 2 more)] === [2022-12-13 22:24:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 372447690, now seen corresponding path program 1 times [2022-12-13 22:24:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:10,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773739378] [2022-12-13 22:24:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:10,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:10,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773739378] [2022-12-13 22:24:10,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773739378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:24:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666836593] [2022-12-13 22:24:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:24:10,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:24:10,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:24:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:10,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:24:10,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:10,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:24:11,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:24:11,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 810 treesize of output 889 [2022-12-13 22:24:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:12,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666836593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:24:12,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:24:12,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 22:24:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841473074] [2022-12-13 22:24:12,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:24:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:24:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:24:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:24:12,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 727 [2022-12-13 22:24:12,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 111 transitions, 1235 flow. Second operand has 10 states, 10 states have (on average 285.9) internal successors, (2859), 10 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:12,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:12,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 727 [2022-12-13 22:24:12,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:14,836 INFO L130 PetriNetUnfolder]: 6331/9541 cut-off events. [2022-12-13 22:24:14,836 INFO L131 PetriNetUnfolder]: For 40114/40114 co-relation queries the response was YES. [2022-12-13 22:24:14,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36935 conditions, 9541 events. 6331/9541 cut-off events. For 40114/40114 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 52080 event pairs, 2896 based on Foata normal form. 96/9637 useless extension candidates. Maximal degree in co-relation 36890. Up to 4797 conditions per place. [2022-12-13 22:24:14,874 INFO L137 encePairwiseOnDemand]: 724/727 looper letters, 102 selfloop transitions, 11 changer transitions 16/129 dead transitions. [2022-12-13 22:24:14,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 129 transitions, 1476 flow [2022-12-13 22:24:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:24:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:24:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1177 transitions. [2022-12-13 22:24:14,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4047455295735901 [2022-12-13 22:24:14,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1177 transitions. [2022-12-13 22:24:14,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1177 transitions. [2022-12-13 22:24:14,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:14,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1177 transitions. [2022-12-13 22:24:14,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:14,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:14,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 727.0) internal successors, (3635), 5 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:14,879 INFO L175 Difference]: Start difference. First operand has 144 places, 111 transitions, 1235 flow. Second operand 4 states and 1177 transitions. [2022-12-13 22:24:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 129 transitions, 1476 flow [2022-12-13 22:24:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 1362 flow, removed 20 selfloop flow, removed 17 redundant places. [2022-12-13 22:24:14,938 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 1054 flow [2022-12-13 22:24:14,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1054, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2022-12-13 22:24:14,938 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2022-12-13 22:24:14,938 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 1054 flow [2022-12-13 22:24:14,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 285.9) internal successors, (2859), 10 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:14,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:14,939 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:24:14,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 22:24:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 22:24:15,140 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 2 more)] === [2022-12-13 22:24:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash 947377457, now seen corresponding path program 1 times [2022-12-13 22:24:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:15,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720890702] [2022-12-13 22:24:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:15,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:24:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:16,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720890702] [2022-12-13 22:24:16,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720890702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:24:16,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015164183] [2022-12-13 22:24:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:16,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:24:16,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:24:16,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:24:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:24:16,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:16,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:24:18,789 INFO L321 Elim1Store]: treesize reduction 114, result has 69.9 percent of original size [2022-12-13 22:24:18,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 982 treesize of output 1102 [2022-12-13 22:24:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 22:24:23,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015164183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:24:23,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:24:23,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-13 22:24:23,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706403694] [2022-12-13 22:24:23,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:24:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 22:24:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 22:24:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-12-13 22:24:24,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 727 [2022-12-13 22:24:24,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 1054 flow. Second operand has 23 states, 23 states have (on average 243.17391304347825) internal successors, (5593), 23 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:24,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:24,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 727 [2022-12-13 22:24:24,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:28,723 INFO L130 PetriNetUnfolder]: 9355/13979 cut-off events. [2022-12-13 22:24:28,723 INFO L131 PetriNetUnfolder]: For 45931/45931 co-relation queries the response was YES. [2022-12-13 22:24:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51510 conditions, 13979 events. 9355/13979 cut-off events. For 45931/45931 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80477 event pairs, 2088 based on Foata normal form. 112/14091 useless extension candidates. Maximal degree in co-relation 51475. Up to 4796 conditions per place. [2022-12-13 22:24:28,769 INFO L137 encePairwiseOnDemand]: 714/727 looper letters, 173 selfloop transitions, 80 changer transitions 95/348 dead transitions. [2022-12-13 22:24:28,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 348 transitions, 2859 flow [2022-12-13 22:24:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 22:24:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 22:24:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5556 transitions. [2022-12-13 22:24:28,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3473802676003501 [2022-12-13 22:24:28,777 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5556 transitions. [2022-12-13 22:24:28,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5556 transitions. [2022-12-13 22:24:28,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:28,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5556 transitions. [2022-12-13 22:24:28,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 252.54545454545453) internal successors, (5556), 22 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:28,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 727.0) internal successors, (16721), 23 states have internal predecessors, (16721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:28,798 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 727.0) internal successors, (16721), 23 states have internal predecessors, (16721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:28,798 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 1054 flow. Second operand 22 states and 5556 transitions. [2022-12-13 22:24:28,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 348 transitions, 2859 flow [2022-12-13 22:24:28,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 348 transitions, 2811 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 22:24:28,898 INFO L231 Difference]: Finished difference. Result has 132 places, 134 transitions, 1638 flow [2022-12-13 22:24:28,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1638, PETRI_PLACES=132, PETRI_TRANSITIONS=134} [2022-12-13 22:24:28,898 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 94 predicate places. [2022-12-13 22:24:28,898 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 134 transitions, 1638 flow [2022-12-13 22:24:28,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 243.17391304347825) internal successors, (5593), 23 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:28,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:28,899 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:24:28,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:24:29,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:29,101 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 2 more)] === [2022-12-13 22:24:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash -601950129, now seen corresponding path program 2 times [2022-12-13 22:24:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:29,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550763303] [2022-12-13 22:24:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:24:30,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:30,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550763303] [2022-12-13 22:24:30,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550763303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:24:30,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635951406] [2022-12-13 22:24:30,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:24:30,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:30,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:24:30,409 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:24:30,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c7bd31-b389-4211-87e8-b2a3a869d391/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:24:30,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:24:30,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:24:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 22:24:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:24:31,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:24:34,322 INFO L321 Elim1Store]: treesize reduction 240, result has 70.0 percent of original size [2022-12-13 22:24:34,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1382 treesize of output 1685