./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/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_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/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_296e773b-7a42-48e6-81a1-b91d2b1590e0/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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- 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 21:50:58,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:50:58,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:50:58,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:50:58,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:50:58,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:50:58,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:50:58,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:50:58,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:50:58,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:50:58,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:50:58,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:50:58,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:50:58,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:50:58,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:50:58,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:50:58,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:50:58,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:50:58,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:50:58,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:50:58,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:50:58,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:50:58,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:50:58,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:50:58,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:50:58,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:50:58,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:50:58,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:50:58,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:50:58,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:50:58,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:50:58,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:50:58,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:50:58,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:50:58,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:50:58,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:50:58,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:50:58,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:50:58,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:50:58,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:50:58,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:50:58,743 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:50:58,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:50:58,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:50:58,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:50:58,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:50:58,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:50:58,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:50:58,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:50:58,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:50:58,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:50:58,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:50:58,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:50:58,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:50:58,762 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:50:58,762 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_296e773b-7a42-48e6-81a1-b91d2b1590e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-12-13 21:50:58,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:50:58,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:50:58,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:50:58,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:50:58,985 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:50:58,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-12-13 21:51:01,480 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:51:01,657 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:51:01,657 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-12-13 21:51:01,662 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/data/22f970320/e2ff77066fe04067bde1792a950a7063/FLAG9a0cf0be4 [2022-12-13 21:51:02,073 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/data/22f970320/e2ff77066fe04067bde1792a950a7063 [2022-12-13 21:51:02,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:51:02,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:51:02,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:51:02,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:51:02,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:51:02,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62957b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02, skipping insertion in model container [2022-12-13 21:51:02,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:51:02,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:51:02,200 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:51:02,201 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:51:02,204 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:51:02,205 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:51:02,206 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:51:02,206 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:51:02,211 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_296e773b-7a42-48e6-81a1-b91d2b1590e0/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-12-13 21:51:02,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:51:02,225 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:51:02,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:51:02,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:51:02,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:51:02,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:51:02,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:51:02,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:51:02,240 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_296e773b-7a42-48e6-81a1-b91d2b1590e0/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-12-13 21:51:02,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:51:02,253 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:51:02,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02 WrapperNode [2022-12-13 21:51:02,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:51:02,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:51:02,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:51:02,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:51:02,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,289 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 191 [2022-12-13 21:51:02,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:51:02,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:51:02,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:51:02,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:51:02,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,308 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:51:02,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:51:02,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:51:02,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:51:02,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (1/1) ... [2022-12-13 21:51:02,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:51:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:02,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:51:02,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:51:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:51:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:51:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:51:02,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:51:02,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:51:02,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:51:02,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:51:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:51:02,369 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 21:51:02,453 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:51:02,454 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:51:02,710 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:51:02,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:51:02,800 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 21:51:02,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:51:02 BoogieIcfgContainer [2022-12-13 21:51:02,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:51:02,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:51:02,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:51:02,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:51:02,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:51:02" (1/3) ... [2022-12-13 21:51:02,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235cd6ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:51:02, skipping insertion in model container [2022-12-13 21:51:02,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:51:02" (2/3) ... [2022-12-13 21:51:02,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235cd6ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:51:02, skipping insertion in model container [2022-12-13 21:51:02,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:51:02" (3/3) ... [2022-12-13 21:51:02,809 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2022-12-13 21:51:02,816 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:51:02,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:51:02,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:51:02,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:51:02,889 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 21:51:02,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2022-12-13 21:51:02,970 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-12-13 21:51:02,970 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:51:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-12-13 21:51:02,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 153 transitions, 330 flow [2022-12-13 21:51:02,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 139 transitions, 296 flow [2022-12-13 21:51:02,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:51:02,990 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 139 transitions, 296 flow [2022-12-13 21:51:02,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 139 transitions, 296 flow [2022-12-13 21:51:02,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 139 transitions, 296 flow [2022-12-13 21:51:03,018 INFO L130 PetriNetUnfolder]: 12/139 cut-off events. [2022-12-13 21:51:03,018 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:51:03,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 12/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-12-13 21:51:03,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-13 21:51:07,289 INFO L134 LiptonReduction]: Checked pairs total: 1518 [2022-12-13 21:51:07,290 INFO L136 LiptonReduction]: Total number of compositions: 139 [2022-12-13 21:51:07,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:51:07,304 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;@6e54fb6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:51:07,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 21:51:07,309 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-13 21:51:07,309 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:51:07,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:07,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:07,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1771321471, now seen corresponding path program 1 times [2022-12-13 21:51:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139137646] [2022-12-13 21:51:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:07,602 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 21:51:07,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139137646] [2022-12-13 21:51:07,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139137646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:51:07,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:51:07,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:51:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190777532] [2022-12-13 21:51:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:07,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:51:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:51:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:51:07,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 292 [2022-12-13 21:51:07,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:07,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:07,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 292 [2022-12-13 21:51:07,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:07,751 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2022-12-13 21:51:07,751 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 21:51:07,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1599 event pairs, 39 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-13 21:51:07,755 INFO L137 encePairwiseOnDemand]: 287/292 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2022-12-13 21:51:07,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2022-12-13 21:51:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:51:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:51:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2022-12-13 21:51:07,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4988584474885845 [2022-12-13 21:51:07,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2022-12-13 21:51:07,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2022-12-13 21:51:07,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:07,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2022-12-13 21:51:07,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:07,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:07,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:07,778 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 437 transitions. [2022-12-13 21:51:07,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2022-12-13 21:51:07,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 21:51:07,782 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2022-12-13 21:51:07,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-12-13 21:51:07,786 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-12-13 21:51:07,786 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2022-12-13 21:51:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:07,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:07,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:07,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:51:07,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash -324031345, now seen corresponding path program 1 times [2022-12-13 21:51:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:07,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182272128] [2022-12-13 21:51:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:07,904 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 21:51:07,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182272128] [2022-12-13 21:51:07,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182272128] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:51:07,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:51:07,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:51:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456951745] [2022-12-13 21:51:07,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:07,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:51:07,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:51:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:51:07,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 292 [2022-12-13 21:51:07,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:07,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:07,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 292 [2022-12-13 21:51:07,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:08,126 INFO L130 PetriNetUnfolder]: 615/923 cut-off events. [2022-12-13 21:51:08,126 INFO L131 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2022-12-13 21:51:08,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 923 events. 615/923 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3928 event pairs, 190 based on Foata normal form. 34/947 useless extension candidates. Maximal degree in co-relation 488. Up to 476 conditions per place. [2022-12-13 21:51:08,131 INFO L137 encePairwiseOnDemand]: 287/292 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2022-12-13 21:51:08,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2022-12-13 21:51:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:51:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:51:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2022-12-13 21:51:08,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4671232876712329 [2022-12-13 21:51:08,134 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2022-12-13 21:51:08,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2022-12-13 21:51:08,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:08,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2022-12-13 21:51:08,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,139 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 682 transitions. [2022-12-13 21:51:08,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2022-12-13 21:51:08,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:51:08,140 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2022-12-13 21:51:08,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-12-13 21:51:08,141 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2022-12-13 21:51:08,141 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2022-12-13 21:51:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:08,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:51:08,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -933159751, now seen corresponding path program 1 times [2022-12-13 21:51:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732609066] [2022-12-13 21:51:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:08,291 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 21:51:08,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:08,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732609066] [2022-12-13 21:51:08,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732609066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:51:08,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:51:08,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:51:08,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169491839] [2022-12-13 21:51:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:51:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:51:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:51:08,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 292 [2022-12-13 21:51:08,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:08,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 292 [2022-12-13 21:51:08,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:08,564 INFO L130 PetriNetUnfolder]: 481/749 cut-off events. [2022-12-13 21:51:08,564 INFO L131 PetriNetUnfolder]: For 319/350 co-relation queries the response was YES. [2022-12-13 21:51:08,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 749 events. 481/749 cut-off events. For 319/350 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3084 event pairs, 223 based on Foata normal form. 59/803 useless extension candidates. Maximal degree in co-relation 1233. Up to 486 conditions per place. [2022-12-13 21:51:08,568 INFO L137 encePairwiseOnDemand]: 287/292 looper letters, 50 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2022-12-13 21:51:08,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 286 flow [2022-12-13 21:51:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:51:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:51:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2022-12-13 21:51:08,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4623287671232877 [2022-12-13 21:51:08,570 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2022-12-13 21:51:08,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2022-12-13 21:51:08,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:08,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2022-12-13 21:51:08,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,573 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,574 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 5 states and 675 transitions. [2022-12-13 21:51:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 286 flow [2022-12-13 21:51:08,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 21:51:08,575 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 121 flow [2022-12-13 21:51:08,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2022-12-13 21:51:08,576 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-12-13 21:51:08,576 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 121 flow [2022-12-13 21:51:08,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:08,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:51:08,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1326079812, now seen corresponding path program 1 times [2022-12-13 21:51:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:08,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038216088] [2022-12-13 21:51:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:08,709 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 21:51:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:08,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038216088] [2022-12-13 21:51:08,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038216088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:51:08,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:51:08,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:51:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938385535] [2022-12-13 21:51:08,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:51:08,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:08,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:51:08,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:51:08,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 292 [2022-12-13 21:51:08,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:08,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 292 [2022-12-13 21:51:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:08,976 INFO L130 PetriNetUnfolder]: 417/635 cut-off events. [2022-12-13 21:51:08,976 INFO L131 PetriNetUnfolder]: For 406/441 co-relation queries the response was YES. [2022-12-13 21:51:08,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634 conditions, 635 events. 417/635 cut-off events. For 406/441 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2506 event pairs, 138 based on Foata normal form. 49/673 useless extension candidates. Maximal degree in co-relation 1372. Up to 368 conditions per place. [2022-12-13 21:51:08,980 INFO L137 encePairwiseOnDemand]: 286/292 looper letters, 34 selfloop transitions, 3 changer transitions 25/64 dead transitions. [2022-12-13 21:51:08,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 333 flow [2022-12-13 21:51:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:51:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:51:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 800 transitions. [2022-12-13 21:51:08,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45662100456621 [2022-12-13 21:51:08,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 800 transitions. [2022-12-13 21:51:08,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 800 transitions. [2022-12-13 21:51:08,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:08,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 800 transitions. [2022-12-13 21:51:08,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,986 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 121 flow. Second operand 6 states and 800 transitions. [2022-12-13 21:51:08,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 333 flow [2022-12-13 21:51:08,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 320 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 21:51:08,989 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 102 flow [2022-12-13 21:51:08,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2022-12-13 21:51:08,990 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2022-12-13 21:51:08,990 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 102 flow [2022-12-13 21:51:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:08,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:08,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:51:08,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 998723270, now seen corresponding path program 1 times [2022-12-13 21:51:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:08,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675620291] [2022-12-13 21:51:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:09,091 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 21:51:09,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675620291] [2022-12-13 21:51:09,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675620291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511906715] [2022-12-13 21:51:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:09,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:09,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:09,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:51:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:51:09,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:09,272 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 21:51:09,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:09,321 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 21:51:09,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511906715] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:09,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:09,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-13 21:51:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771735385] [2022-12-13 21:51:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:51:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:51:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:51:09,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2022-12-13 21:51:09,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:09,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:09,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2022-12-13 21:51:09,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:09,627 INFO L130 PetriNetUnfolder]: 544/799 cut-off events. [2022-12-13 21:51:09,627 INFO L131 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2022-12-13 21:51:09,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 799 events. 544/799 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2999 event pairs, 139 based on Foata normal form. 16/814 useless extension candidates. Maximal degree in co-relation 2121. Up to 410 conditions per place. [2022-12-13 21:51:09,635 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2022-12-13 21:51:09,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 372 flow [2022-12-13 21:51:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 878 transitions. [2022-12-13 21:51:09,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4295499021526419 [2022-12-13 21:51:09,637 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 878 transitions. [2022-12-13 21:51:09,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 878 transitions. [2022-12-13 21:51:09,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:09,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 878 transitions. [2022-12-13 21:51:09,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:09,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:09,641 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:09,641 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 102 flow. Second operand 7 states and 878 transitions. [2022-12-13 21:51:09,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 372 flow [2022-12-13 21:51:09,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 337 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-12-13 21:51:09,643 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 142 flow [2022-12-13 21:51:09,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-12-13 21:51:09,644 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-12-13 21:51:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 142 flow [2022-12-13 21:51:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:09,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:09,644 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:09,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:09,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:09,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:09,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash -639723492, now seen corresponding path program 2 times [2022-12-13 21:51:09,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:09,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977120803] [2022-12-13 21:51:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:09,944 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 21:51:09,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:09,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977120803] [2022-12-13 21:51:09,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977120803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205974569] [2022-12-13 21:51:09,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:51:09,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:09,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:09,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:09,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:51:10,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:51:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:51:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:10,079 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 21:51:10,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:10,127 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 21:51:10,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205974569] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:10,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:10,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-13 21:51:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562959483] [2022-12-13 21:51:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:10,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:51:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:51:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:51:10,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2022-12-13 21:51:10,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:10,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:10,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2022-12-13 21:51:10,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:10,407 INFO L130 PetriNetUnfolder]: 736/1083 cut-off events. [2022-12-13 21:51:10,407 INFO L131 PetriNetUnfolder]: For 1025/1025 co-relation queries the response was YES. [2022-12-13 21:51:10,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1083 events. 736/1083 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4344 event pairs, 221 based on Foata normal form. 12/1094 useless extension candidates. Maximal degree in co-relation 3380. Up to 648 conditions per place. [2022-12-13 21:51:10,412 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2022-12-13 21:51:10,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2022-12-13 21:51:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 874 transitions. [2022-12-13 21:51:10,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42759295499021527 [2022-12-13 21:51:10,415 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 874 transitions. [2022-12-13 21:51:10,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 874 transitions. [2022-12-13 21:51:10,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:10,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 874 transitions. [2022-12-13 21:51:10,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:10,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:10,418 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:10,419 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 142 flow. Second operand 7 states and 874 transitions. [2022-12-13 21:51:10,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2022-12-13 21:51:10,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:10,422 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2022-12-13 21:51:10,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2022-12-13 21:51:10,423 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2022-12-13 21:51:10,423 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2022-12-13 21:51:10,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:10,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:10,424 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:10,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:51:10,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:10,625 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2145059472, now seen corresponding path program 3 times [2022-12-13 21:51:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:10,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372405686] [2022-12-13 21:51:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:10,724 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 21:51:10,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:10,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372405686] [2022-12-13 21:51:10,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372405686] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:10,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686204093] [2022-12-13 21:51:10,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:51:10,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:10,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:10,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:51:10,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:51:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:51:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:10,882 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 21:51:10,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:10,936 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 21:51:10,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686204093] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:10,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:10,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-13 21:51:10,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63794480] [2022-12-13 21:51:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:10,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:51:10,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:51:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:51:11,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2022-12-13 21:51:11,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:11,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:11,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2022-12-13 21:51:11,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:11,251 INFO L130 PetriNetUnfolder]: 840/1246 cut-off events. [2022-12-13 21:51:11,251 INFO L131 PetriNetUnfolder]: For 2140/2140 co-relation queries the response was YES. [2022-12-13 21:51:11,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1246 events. 840/1246 cut-off events. For 2140/2140 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5336 event pairs, 211 based on Foata normal form. 16/1261 useless extension candidates. Maximal degree in co-relation 4469. Up to 612 conditions per place. [2022-12-13 21:51:11,263 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2022-12-13 21:51:11,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 561 flow [2022-12-13 21:51:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 881 transitions. [2022-12-13 21:51:11,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43101761252446186 [2022-12-13 21:51:11,265 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 881 transitions. [2022-12-13 21:51:11,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 881 transitions. [2022-12-13 21:51:11,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 881 transitions. [2022-12-13 21:51:11,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.85714285714286) internal successors, (881), 7 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:11,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:11,268 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:11,268 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 881 transitions. [2022-12-13 21:51:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 561 flow [2022-12-13 21:51:11,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 520 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:11,272 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2022-12-13 21:51:11,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-12-13 21:51:11,272 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2022-12-13 21:51:11,272 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2022-12-13 21:51:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:11,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:11,273 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:11,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:11,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 21:51:11,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash 339325850, now seen corresponding path program 4 times [2022-12-13 21:51:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154967609] [2022-12-13 21:51:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:11,570 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 21:51:11,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154967609] [2022-12-13 21:51:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154967609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498152877] [2022-12-13 21:51:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:51:11,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:11,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:11,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:11,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:51:11,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:51:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:51:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:11,710 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 21:51:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:11,769 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 21:51:11,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498152877] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:11,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:11,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-13 21:51:11,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929461171] [2022-12-13 21:51:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:11,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:51:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:51:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:51:11,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2022-12-13 21:51:11,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:11,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:11,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2022-12-13 21:51:11,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:12,061 INFO L130 PetriNetUnfolder]: 824/1230 cut-off events. [2022-12-13 21:51:12,061 INFO L131 PetriNetUnfolder]: For 3321/3321 co-relation queries the response was YES. [2022-12-13 21:51:12,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4829 conditions, 1230 events. 824/1230 cut-off events. For 3321/3321 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5203 event pairs, 213 based on Foata normal form. 16/1245 useless extension candidates. Maximal degree in co-relation 4801. Up to 676 conditions per place. [2022-12-13 21:51:12,066 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 58 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2022-12-13 21:51:12,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 647 flow [2022-12-13 21:51:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 877 transitions. [2022-12-13 21:51:12,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42906066536203524 [2022-12-13 21:51:12,068 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 877 transitions. [2022-12-13 21:51:12,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 877 transitions. [2022-12-13 21:51:12,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:12,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 877 transitions. [2022-12-13 21:51:12,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,072 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,072 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 7 states and 877 transitions. [2022-12-13 21:51:12,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 647 flow [2022-12-13 21:51:12,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 622 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:12,077 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 449 flow [2022-12-13 21:51:12,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2022-12-13 21:51:12,078 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2022-12-13 21:51:12,078 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 449 flow [2022-12-13 21:51:12,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:12,078 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:12,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:51:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:12,279 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2086332762, now seen corresponding path program 5 times [2022-12-13 21:51:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174096754] [2022-12-13 21:51:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:12,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:12,453 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 21:51:12,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174096754] [2022-12-13 21:51:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174096754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:12,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873708237] [2022-12-13 21:51:12,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:51:12,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:12,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:12,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:51:12,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:51:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:51:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:12,573 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 21:51:12,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:12,620 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 21:51:12,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873708237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:12,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:12,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 21:51:12,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172274162] [2022-12-13 21:51:12,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:12,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:51:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:51:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:51:12,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 292 [2022-12-13 21:51:12,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 449 flow. Second operand has 14 states, 14 states have (on average 118.28571428571429) internal successors, (1656), 14 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:12,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 292 [2022-12-13 21:51:12,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:13,183 INFO L130 PetriNetUnfolder]: 850/1272 cut-off events. [2022-12-13 21:51:13,183 INFO L131 PetriNetUnfolder]: For 4710/4710 co-relation queries the response was YES. [2022-12-13 21:51:13,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1272 events. 850/1272 cut-off events. For 4710/4710 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5120 event pairs, 36 based on Foata normal form. 14/1285 useless extension candidates. Maximal degree in co-relation 5517. Up to 522 conditions per place. [2022-12-13 21:51:13,196 INFO L137 encePairwiseOnDemand]: 283/292 looper letters, 87 selfloop transitions, 43 changer transitions 0/130 dead transitions. [2022-12-13 21:51:13,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 1191 flow [2022-12-13 21:51:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 21:51:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 21:51:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1354 transitions. [2022-12-13 21:51:13,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4215442092154421 [2022-12-13 21:51:13,198 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1354 transitions. [2022-12-13 21:51:13,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1354 transitions. [2022-12-13 21:51:13,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:13,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1354 transitions. [2022-12-13 21:51:13,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 123.0909090909091) internal successors, (1354), 11 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:13,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 292.0) internal successors, (3504), 12 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:13,203 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 292.0) internal successors, (3504), 12 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:13,203 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 449 flow. Second operand 11 states and 1354 transitions. [2022-12-13 21:51:13,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 1191 flow [2022-12-13 21:51:13,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 130 transitions, 1122 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:13,211 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 723 flow [2022-12-13 21:51:13,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=723, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2022-12-13 21:51:13,211 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2022-12-13 21:51:13,211 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 723 flow [2022-12-13 21:51:13,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 118.28571428571429) internal successors, (1656), 14 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:13,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:13,212 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:13,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:51:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:13,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1946606408, now seen corresponding path program 6 times [2022-12-13 21:51:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165541498] [2022-12-13 21:51:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:13,496 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 21:51:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165541498] [2022-12-13 21:51:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165541498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932800663] [2022-12-13 21:51:13,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:51:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:13,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:13,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:51:13,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 21:51:13,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:51:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:13,644 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 21:51:13,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:13,707 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 21:51:13,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932800663] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:13,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:13,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-13 21:51:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709318465] [2022-12-13 21:51:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:13,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:51:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:51:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:51:13,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2022-12-13 21:51:13,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:13,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:13,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2022-12-13 21:51:13,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:14,047 INFO L130 PetriNetUnfolder]: 823/1215 cut-off events. [2022-12-13 21:51:14,047 INFO L131 PetriNetUnfolder]: For 5378/5378 co-relation queries the response was YES. [2022-12-13 21:51:14,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5568 conditions, 1215 events. 823/1215 cut-off events. For 5378/5378 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4702 event pairs, 206 based on Foata normal form. 14/1228 useless extension candidates. Maximal degree in co-relation 5533. Up to 682 conditions per place. [2022-12-13 21:51:14,054 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 65 selfloop transitions, 36 changer transitions 0/105 dead transitions. [2022-12-13 21:51:14,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 1062 flow [2022-12-13 21:51:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 875 transitions. [2022-12-13 21:51:14,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4280821917808219 [2022-12-13 21:51:14,056 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 875 transitions. [2022-12-13 21:51:14,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 875 transitions. [2022-12-13 21:51:14,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:14,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 875 transitions. [2022-12-13 21:51:14,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,059 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,059 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 723 flow. Second operand 7 states and 875 transitions. [2022-12-13 21:51:14,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 1062 flow [2022-12-13 21:51:14,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 1019 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:14,071 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 836 flow [2022-12-13 21:51:14,071 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2022-12-13 21:51:14,071 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2022-12-13 21:51:14,071 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 836 flow [2022-12-13 21:51:14,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:14,072 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:14,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:51:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 21:51:14,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash -154590132, now seen corresponding path program 1 times [2022-12-13 21:51:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081135266] [2022-12-13 21:51:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:14,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081135266] [2022-12-13 21:51:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081135266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767251817] [2022-12-13 21:51:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:14,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:14,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:14,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:14,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:51:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:14,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:51:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:14,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767251817] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:14,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:14,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-13 21:51:14,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558407474] [2022-12-13 21:51:14,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:51:14,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:51:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:51:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:51:14,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 292 [2022-12-13 21:51:14,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 836 flow. Second operand has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:14,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 292 [2022-12-13 21:51:14,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:14,745 INFO L130 PetriNetUnfolder]: 688/1012 cut-off events. [2022-12-13 21:51:14,746 INFO L131 PetriNetUnfolder]: For 6275/6471 co-relation queries the response was YES. [2022-12-13 21:51:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4900 conditions, 1012 events. 688/1012 cut-off events. For 6275/6471 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4186 event pairs, 222 based on Foata normal form. 160/1111 useless extension candidates. Maximal degree in co-relation 4862. Up to 769 conditions per place. [2022-12-13 21:51:14,754 INFO L137 encePairwiseOnDemand]: 287/292 looper letters, 81 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2022-12-13 21:51:14,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 1203 flow [2022-12-13 21:51:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:51:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:51:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2022-12-13 21:51:14,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44452054794520546 [2022-12-13 21:51:14,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2022-12-13 21:51:14,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2022-12-13 21:51:14,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:14,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2022-12-13 21:51:14,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,757 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 836 flow. Second operand 5 states and 649 transitions. [2022-12-13 21:51:14,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 1203 flow [2022-12-13 21:51:14,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 1106 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-12-13 21:51:14,766 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 789 flow [2022-12-13 21:51:14,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2022-12-13 21:51:14,767 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2022-12-13 21:51:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 789 flow [2022-12-13 21:51:14,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:14,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:14,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:14,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:51:14,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 21:51:14,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 665823601, now seen corresponding path program 1 times [2022-12-13 21:51:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:14,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757853923] [2022-12-13 21:51:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:14,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:15,578 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 21:51:15,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757853923] [2022-12-13 21:51:15,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757853923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806673832] [2022-12-13 21:51:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:15,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:15,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:15,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:15,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:51:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 21:51:15,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:15,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:15,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:16,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:16,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-13 21:51:16,090 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 21:51:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:18,221 WARN L837 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_434 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_434) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-12-13 21:51:20,262 WARN L837 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_434 (Array Int Int)) (v_ArrVal_433 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (= c_~res1~0 (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_433) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_434) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-12-13 21:51:20,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:20,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 88 [2022-12-13 21:51:20,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2022-12-13 21:51:20,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-13 21:51:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 21:51:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806673832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:20,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:20,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2022-12-13 21:51:20,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958801184] [2022-12-13 21:51:20,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:20,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 21:51:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 21:51:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=495, Unknown=2, NotChecked=94, Total=702 [2022-12-13 21:51:20,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 292 [2022-12-13 21:51:20,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 789 flow. Second operand has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:20,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:20,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 292 [2022-12-13 21:51:20,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:21,466 INFO L130 PetriNetUnfolder]: 1252/1882 cut-off events. [2022-12-13 21:51:21,466 INFO L131 PetriNetUnfolder]: For 9590/9839 co-relation queries the response was YES. [2022-12-13 21:51:21,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 1882 events. 1252/1882 cut-off events. For 9590/9839 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8572 event pairs, 73 based on Foata normal form. 201/2079 useless extension candidates. Maximal degree in co-relation 8459. Up to 1117 conditions per place. [2022-12-13 21:51:21,475 INFO L137 encePairwiseOnDemand]: 283/292 looper letters, 128 selfloop transitions, 101 changer transitions 3/238 dead transitions. [2022-12-13 21:51:21,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 238 transitions, 2572 flow [2022-12-13 21:51:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 21:51:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 21:51:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1441 transitions. [2022-12-13 21:51:21,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32899543378995433 [2022-12-13 21:51:21,478 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1441 transitions. [2022-12-13 21:51:21,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1441 transitions. [2022-12-13 21:51:21,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:21,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1441 transitions. [2022-12-13 21:51:21,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 96.06666666666666) internal successors, (1441), 15 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:21,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 292.0) internal successors, (4672), 16 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:21,483 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 292.0) internal successors, (4672), 16 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:21,483 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 789 flow. Second operand 15 states and 1441 transitions. [2022-12-13 21:51:21,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 238 transitions, 2572 flow [2022-12-13 21:51:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 238 transitions, 2534 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:21,499 INFO L231 Difference]: Finished difference. Result has 91 places, 154 transitions, 1887 flow [2022-12-13 21:51:21,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1887, PETRI_PLACES=91, PETRI_TRANSITIONS=154} [2022-12-13 21:51:21,499 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2022-12-13 21:51:21,499 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 154 transitions, 1887 flow [2022-12-13 21:51:21,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:21,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:21,500 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:21,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:21,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:21,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1927766212, now seen corresponding path program 1 times [2022-12-13 21:51:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:21,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872103004] [2022-12-13 21:51:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:21,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872103004] [2022-12-13 21:51:21,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872103004] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:21,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884614406] [2022-12-13 21:51:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:21,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:21,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:21,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:21,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:51:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:22,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 21:51:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:22,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 21:51:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:22,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:22,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:22,243 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 23 treesize of output 20 [2022-12-13 21:51:22,254 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 21:51:22,254 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 24 treesize of output 13 [2022-12-13 21:51:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884614406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:22,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:22,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-12-13 21:51:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68779875] [2022-12-13 21:51:22,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:22,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:51:22,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:51:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:51:22,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 292 [2022-12-13 21:51:22,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 154 transitions, 1887 flow. Second operand has 11 states, 11 states have (on average 124.45454545454545) internal successors, (1369), 11 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:22,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:22,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 292 [2022-12-13 21:51:22,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:23,003 INFO L130 PetriNetUnfolder]: 1701/2577 cut-off events. [2022-12-13 21:51:23,003 INFO L131 PetriNetUnfolder]: For 19879/20185 co-relation queries the response was YES. [2022-12-13 21:51:23,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14186 conditions, 2577 events. 1701/2577 cut-off events. For 19879/20185 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12395 event pairs, 292 based on Foata normal form. 252/2793 useless extension candidates. Maximal degree in co-relation 13711. Up to 1818 conditions per place. [2022-12-13 21:51:23,015 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 144 selfloop transitions, 125 changer transitions 1/275 dead transitions. [2022-12-13 21:51:23,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 275 transitions, 3703 flow [2022-12-13 21:51:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 928 transitions. [2022-12-13 21:51:23,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45401174168297453 [2022-12-13 21:51:23,017 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 928 transitions. [2022-12-13 21:51:23,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 928 transitions. [2022-12-13 21:51:23,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:23,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 928 transitions. [2022-12-13 21:51:23,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.57142857142858) internal successors, (928), 7 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:23,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:23,020 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:23,020 INFO L175 Difference]: Start difference. First operand has 91 places, 154 transitions, 1887 flow. Second operand 7 states and 928 transitions. [2022-12-13 21:51:23,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 275 transitions, 3703 flow [2022-12-13 21:51:23,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 275 transitions, 3514 flow, removed 54 selfloop flow, removed 2 redundant places. [2022-12-13 21:51:23,058 INFO L231 Difference]: Finished difference. Result has 99 places, 221 transitions, 3002 flow [2022-12-13 21:51:23,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3002, PETRI_PLACES=99, PETRI_TRANSITIONS=221} [2022-12-13 21:51:23,059 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2022-12-13 21:51:23,059 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 221 transitions, 3002 flow [2022-12-13 21:51:23,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 124.45454545454545) internal successors, (1369), 11 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:23,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:23,060 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:23,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:51:23,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:51:23,261 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1048300608, now seen corresponding path program 2 times [2022-12-13 21:51:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:23,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310861340] [2022-12-13 21:51:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:23,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310861340] [2022-12-13 21:51:23,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310861340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:23,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787229304] [2022-12-13 21:51:23,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:51:23,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:23,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:23,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:23,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:51:23,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:51:23,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 21:51:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:23,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 21:51:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:23,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:23,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:23,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-12-13 21:51:23,796 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:51:23,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-12-13 21:51:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:23,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787229304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:23,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:23,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-12-13 21:51:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628855099] [2022-12-13 21:51:23,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:51:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:51:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:51:23,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 292 [2022-12-13 21:51:23,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 221 transitions, 3002 flow. Second operand has 11 states, 11 states have (on average 124.27272727272727) internal successors, (1367), 11 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:23,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:23,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 292 [2022-12-13 21:51:23,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:24,669 INFO L130 PetriNetUnfolder]: 2465/3731 cut-off events. [2022-12-13 21:51:24,669 INFO L131 PetriNetUnfolder]: For 34369/34936 co-relation queries the response was YES. [2022-12-13 21:51:24,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22450 conditions, 3731 events. 2465/3731 cut-off events. For 34369/34936 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19509 event pairs, 258 based on Foata normal form. 478/4145 useless extension candidates. Maximal degree in co-relation 21980. Up to 2388 conditions per place. [2022-12-13 21:51:24,687 INFO L137 encePairwiseOnDemand]: 283/292 looper letters, 159 selfloop transitions, 183 changer transitions 1/348 dead transitions. [2022-12-13 21:51:24,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 348 transitions, 5096 flow [2022-12-13 21:51:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 936 transitions. [2022-12-13 21:51:24,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45792563600782776 [2022-12-13 21:51:24,689 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 936 transitions. [2022-12-13 21:51:24,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 936 transitions. [2022-12-13 21:51:24,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:24,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 936 transitions. [2022-12-13 21:51:24,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:24,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:24,691 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:24,691 INFO L175 Difference]: Start difference. First operand has 99 places, 221 transitions, 3002 flow. Second operand 7 states and 936 transitions. [2022-12-13 21:51:24,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 348 transitions, 5096 flow [2022-12-13 21:51:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 348 transitions, 5054 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-12-13 21:51:24,755 INFO L231 Difference]: Finished difference. Result has 108 places, 287 transitions, 4449 flow [2022-12-13 21:51:24,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4449, PETRI_PLACES=108, PETRI_TRANSITIONS=287} [2022-12-13 21:51:24,755 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2022-12-13 21:51:24,755 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 287 transitions, 4449 flow [2022-12-13 21:51:24,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 124.27272727272727) internal successors, (1367), 11 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:24,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:24,756 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] [2022-12-13 21:51:24,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 21:51:24,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1733504768, now seen corresponding path program 3 times [2022-12-13 21:51:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907549390] [2022-12-13 21:51:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907549390] [2022-12-13 21:51:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907549390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500339856] [2022-12-13 21:51:25,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:51:25,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:25,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:25,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:51:25,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:51:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 21:51:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:25,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:25,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 21:51:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:25,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:25,736 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_567 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_567) c_~A~0.base) c_~A~0.offset)) (+ c_~res1~0 1))) (forall ((v_ArrVal_567 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_567) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-13 21:51:25,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:25,751 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 48 treesize of output 38 [2022-12-13 21:51:25,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 21:51:25,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 21:51:25,770 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:51:25,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-12-13 21:51:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-13 21:51:25,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500339856] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:25,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:25,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 21:51:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787086067] [2022-12-13 21:51:25,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:25,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:51:25,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:51:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=242, Unknown=1, NotChecked=32, Total=342 [2022-12-13 21:51:25,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 292 [2022-12-13 21:51:25,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 287 transitions, 4449 flow. Second operand has 19 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:25,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:25,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 292 [2022-12-13 21:51:25,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:26,799 INFO L130 PetriNetUnfolder]: 3041/4591 cut-off events. [2022-12-13 21:51:26,799 INFO L131 PetriNetUnfolder]: For 54035/54828 co-relation queries the response was YES. [2022-12-13 21:51:26,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30424 conditions, 4591 events. 3041/4591 cut-off events. For 54035/54828 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24910 event pairs, 350 based on Foata normal form. 656/5179 useless extension candidates. Maximal degree in co-relation 29928. Up to 2662 conditions per place. [2022-12-13 21:51:26,822 INFO L137 encePairwiseOnDemand]: 284/292 looper letters, 162 selfloop transitions, 230 changer transitions 1/398 dead transitions. [2022-12-13 21:51:26,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 398 transitions, 6540 flow [2022-12-13 21:51:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 817 transitions. [2022-12-13 21:51:26,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.399706457925636 [2022-12-13 21:51:26,824 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 817 transitions. [2022-12-13 21:51:26,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 817 transitions. [2022-12-13 21:51:26,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:26,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 817 transitions. [2022-12-13 21:51:26,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.71428571428571) internal successors, (817), 7 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:26,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:26,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:26,827 INFO L175 Difference]: Start difference. First operand has 108 places, 287 transitions, 4449 flow. Second operand 7 states and 817 transitions. [2022-12-13 21:51:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 398 transitions, 6540 flow [2022-12-13 21:51:26,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 398 transitions, 6315 flow, removed 63 selfloop flow, removed 2 redundant places. [2022-12-13 21:51:26,944 INFO L231 Difference]: Finished difference. Result has 115 places, 337 transitions, 5738 flow [2022-12-13 21:51:26,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5738, PETRI_PLACES=115, PETRI_TRANSITIONS=337} [2022-12-13 21:51:26,945 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2022-12-13 21:51:26,945 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 337 transitions, 5738 flow [2022-12-13 21:51:26,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:26,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:26,945 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:26,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:27,146 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1160941901, now seen corresponding path program 2 times [2022-12-13 21:51:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:27,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228758638] [2022-12-13 21:51:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:27,558 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 21:51:27,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228758638] [2022-12-13 21:51:27,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228758638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495810720] [2022-12-13 21:51:27,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:51:27,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:27,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:27,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 21:51:27,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:51:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 21:51:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:27,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-13 21:51:27,930 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 21:51:27,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:27,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:27,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-12-13 21:51:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:28,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495810720] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:28,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:28,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2022-12-13 21:51:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116666282] [2022-12-13 21:51:28,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:28,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 21:51:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 21:51:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-12-13 21:51:29,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 292 [2022-12-13 21:51:29,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 337 transitions, 5738 flow. Second operand has 26 states, 26 states have (on average 106.11538461538461) internal successors, (2759), 26 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:29,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:29,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 292 [2022-12-13 21:51:29,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:30,981 INFO L130 PetriNetUnfolder]: 3687/5573 cut-off events. [2022-12-13 21:51:30,982 INFO L131 PetriNetUnfolder]: For 63605/63605 co-relation queries the response was YES. [2022-12-13 21:51:30,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38321 conditions, 5573 events. 3687/5573 cut-off events. For 63605/63605 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29861 event pairs, 990 based on Foata normal form. 2/5575 useless extension candidates. Maximal degree in co-relation 37787. Up to 4972 conditions per place. [2022-12-13 21:51:31,010 INFO L137 encePairwiseOnDemand]: 280/292 looper letters, 348 selfloop transitions, 159 changer transitions 9/516 dead transitions. [2022-12-13 21:51:31,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 516 transitions, 8479 flow [2022-12-13 21:51:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 21:51:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 21:51:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2897 transitions. [2022-12-13 21:51:31,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3815858798735511 [2022-12-13 21:51:31,015 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2897 transitions. [2022-12-13 21:51:31,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2897 transitions. [2022-12-13 21:51:31,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:31,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2897 transitions. [2022-12-13 21:51:31,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.42307692307692) internal successors, (2897), 26 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:31,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 292.0) internal successors, (7884), 27 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:31,024 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 292.0) internal successors, (7884), 27 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:31,025 INFO L175 Difference]: Start difference. First operand has 115 places, 337 transitions, 5738 flow. Second operand 26 states and 2897 transitions. [2022-12-13 21:51:31,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 516 transitions, 8479 flow [2022-12-13 21:51:31,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 516 transitions, 8242 flow, removed 59 selfloop flow, removed 2 redundant places. [2022-12-13 21:51:31,205 INFO L231 Difference]: Finished difference. Result has 145 places, 401 transitions, 6881 flow [2022-12-13 21:51:31,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6881, PETRI_PLACES=145, PETRI_TRANSITIONS=401} [2022-12-13 21:51:31,205 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2022-12-13 21:51:31,205 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 401 transitions, 6881 flow [2022-12-13 21:51:31,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 106.11538461538461) internal successors, (2759), 26 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:31,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:31,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:31,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 21:51:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 21:51:31,407 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash -64342376, now seen corresponding path program 4 times [2022-12-13 21:51:31,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:31,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450071088] [2022-12-13 21:51:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:31,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:31,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450071088] [2022-12-13 21:51:31,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450071088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:31,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125473775] [2022-12-13 21:51:31,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:51:31,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:31,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:31,763 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:31,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 21:51:31,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:51:31,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 21:51:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:31,897 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 21:51:31,927 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 21:51:31,958 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 21:51:31,985 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 21:51:32,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 21:51:32,076 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 21:51:32,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:32,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125473775] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:32,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:32,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2022-12-13 21:51:32,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578359988] [2022-12-13 21:51:32,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:32,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:51:32,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:51:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:51:32,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 292 [2022-12-13 21:51:32,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 401 transitions, 6881 flow. Second operand has 15 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:32,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:32,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 292 [2022-12-13 21:51:32,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:33,656 INFO L130 PetriNetUnfolder]: 3454/5250 cut-off events. [2022-12-13 21:51:33,656 INFO L131 PetriNetUnfolder]: For 74223/74968 co-relation queries the response was YES. [2022-12-13 21:51:33,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38420 conditions, 5250 events. 3454/5250 cut-off events. For 74223/74968 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29354 event pairs, 835 based on Foata normal form. 501/5613 useless extension candidates. Maximal degree in co-relation 37866. Up to 4669 conditions per place. [2022-12-13 21:51:33,685 INFO L137 encePairwiseOnDemand]: 283/292 looper letters, 311 selfloop transitions, 129 changer transitions 1/453 dead transitions. [2022-12-13 21:51:33,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 453 transitions, 8248 flow [2022-12-13 21:51:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:51:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:51:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2022-12-13 21:51:33,687 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4165239726027397 [2022-12-13 21:51:33,687 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2022-12-13 21:51:33,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2022-12-13 21:51:33,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:33,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2022-12-13 21:51:33,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 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 21:51:33,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 292.0) internal successors, (2628), 9 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:33,689 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 292.0) internal successors, (2628), 9 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:33,690 INFO L175 Difference]: Start difference. First operand has 145 places, 401 transitions, 6881 flow. Second operand 8 states and 973 transitions. [2022-12-13 21:51:33,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 453 transitions, 8248 flow [2022-12-13 21:51:33,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 453 transitions, 7946 flow, removed 58 selfloop flow, removed 9 redundant places. [2022-12-13 21:51:33,874 INFO L231 Difference]: Finished difference. Result has 145 places, 412 transitions, 7023 flow [2022-12-13 21:51:33,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7023, PETRI_PLACES=145, PETRI_TRANSITIONS=412} [2022-12-13 21:51:33,875 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2022-12-13 21:51:33,875 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 412 transitions, 7023 flow [2022-12-13 21:51:33,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:33,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:33,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:33,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:34,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 21:51:34,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1250164395, now seen corresponding path program 3 times [2022-12-13 21:51:34,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:34,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142029579] [2022-12-13 21:51:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:34,450 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 21:51:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142029579] [2022-12-13 21:51:34,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142029579] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067726967] [2022-12-13 21:51:34,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:51:34,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:34,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:34,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 21:51:34,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:51:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 21:51:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:34,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 21:51:34,713 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 21:51:34,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:34,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:34,754 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 23 treesize of output 20 [2022-12-13 21:51:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:34,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067726967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:34,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:34,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2022-12-13 21:51:34,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194846011] [2022-12-13 21:51:34,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:34,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 21:51:34,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:34,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 21:51:34,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-12-13 21:51:35,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 292 [2022-12-13 21:51:35,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 412 transitions, 7023 flow. Second operand has 23 states, 23 states have (on average 105.91304347826087) internal successors, (2436), 23 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:35,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:35,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 292 [2022-12-13 21:51:35,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:36,840 INFO L130 PetriNetUnfolder]: 3853/5824 cut-off events. [2022-12-13 21:51:36,840 INFO L131 PetriNetUnfolder]: For 71258/71258 co-relation queries the response was YES. [2022-12-13 21:51:36,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41788 conditions, 5824 events. 3853/5824 cut-off events. For 71258/71258 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31485 event pairs, 1069 based on Foata normal form. 1/5825 useless extension candidates. Maximal degree in co-relation 41231. Up to 5222 conditions per place. [2022-12-13 21:51:36,875 INFO L137 encePairwiseOnDemand]: 279/292 looper letters, 322 selfloop transitions, 149 changer transitions 1/472 dead transitions. [2022-12-13 21:51:36,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 472 transitions, 8454 flow [2022-12-13 21:51:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 21:51:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 21:51:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1562 transitions. [2022-12-13 21:51:36,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3820939334637965 [2022-12-13 21:51:36,877 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1562 transitions. [2022-12-13 21:51:36,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1562 transitions. [2022-12-13 21:51:36,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:36,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1562 transitions. [2022-12-13 21:51:36,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.57142857142857) internal successors, (1562), 14 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:36,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 292.0) internal successors, (4380), 15 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:36,881 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 292.0) internal successors, (4380), 15 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:36,881 INFO L175 Difference]: Start difference. First operand has 145 places, 412 transitions, 7023 flow. Second operand 14 states and 1562 transitions. [2022-12-13 21:51:36,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 472 transitions, 8454 flow [2022-12-13 21:51:37,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 472 transitions, 8243 flow, removed 37 selfloop flow, removed 4 redundant places. [2022-12-13 21:51:37,103 INFO L231 Difference]: Finished difference. Result has 156 places, 413 transitions, 7141 flow [2022-12-13 21:51:37,103 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7141, PETRI_PLACES=156, PETRI_TRANSITIONS=413} [2022-12-13 21:51:37,104 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2022-12-13 21:51:37,104 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 413 transitions, 7141 flow [2022-12-13 21:51:37,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 105.91304347826087) internal successors, (2436), 23 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:37,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:37,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:37,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:37,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 21:51:37,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1801751257, now seen corresponding path program 4 times [2022-12-13 21:51:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:37,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635903017] [2022-12-13 21:51:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:37,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:37,758 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 21:51:37,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635903017] [2022-12-13 21:51:37,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635903017] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063322834] [2022-12-13 21:51:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:51:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:37,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:37,759 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:37,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 21:51:37,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:51:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 21:51:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:38,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 21:51:38,088 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 21:51:38,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:38,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:38,184 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 23 treesize of output 20 [2022-12-13 21:51:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:38,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063322834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:38,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:38,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 25 [2022-12-13 21:51:38,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587856830] [2022-12-13 21:51:38,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:38,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 21:51:38,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 21:51:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-12-13 21:51:39,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 292 [2022-12-13 21:51:39,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 413 transitions, 7141 flow. Second operand has 27 states, 27 states have (on average 106.0) internal successors, (2862), 27 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:39,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:39,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 292 [2022-12-13 21:51:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:42,081 INFO L130 PetriNetUnfolder]: 4041/6130 cut-off events. [2022-12-13 21:51:42,081 INFO L131 PetriNetUnfolder]: For 73126/73126 co-relation queries the response was YES. [2022-12-13 21:51:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44249 conditions, 6130 events. 4041/6130 cut-off events. For 73126/73126 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33632 event pairs, 1102 based on Foata normal form. 2/6132 useless extension candidates. Maximal degree in co-relation 43689. Up to 5479 conditions per place. [2022-12-13 21:51:42,116 INFO L137 encePairwiseOnDemand]: 280/292 looper letters, 370 selfloop transitions, 202 changer transitions 9/581 dead transitions. [2022-12-13 21:51:42,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 581 transitions, 10067 flow [2022-12-13 21:51:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 21:51:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 21:51:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3003 transitions. [2022-12-13 21:51:42,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3808980213089802 [2022-12-13 21:51:42,119 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3003 transitions. [2022-12-13 21:51:42,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3003 transitions. [2022-12-13 21:51:42,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:42,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3003 transitions. [2022-12-13 21:51:42,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.22222222222223) internal successors, (3003), 27 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:42,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 292.0) internal successors, (8176), 28 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:42,126 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 292.0) internal successors, (8176), 28 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:42,126 INFO L175 Difference]: Start difference. First operand has 156 places, 413 transitions, 7141 flow. Second operand 27 states and 3003 transitions. [2022-12-13 21:51:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 581 transitions, 10067 flow [2022-12-13 21:51:42,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 581 transitions, 9724 flow, removed 12 selfloop flow, removed 11 redundant places. [2022-12-13 21:51:42,387 INFO L231 Difference]: Finished difference. Result has 178 places, 472 transitions, 8227 flow [2022-12-13 21:51:42,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8227, PETRI_PLACES=178, PETRI_TRANSITIONS=472} [2022-12-13 21:51:42,387 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2022-12-13 21:51:42,387 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 472 transitions, 8227 flow [2022-12-13 21:51:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.0) internal successors, (2862), 27 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:42,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:42,388 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:42,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 21:51:42,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:42,589 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash -385322997, now seen corresponding path program 5 times [2022-12-13 21:51:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820921052] [2022-12-13 21:51:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:42,950 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 21:51:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820921052] [2022-12-13 21:51:42,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820921052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93561626] [2022-12-13 21:51:42,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:51:42,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:42,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:42,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 21:51:43,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 21:51:43,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 21:51:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:43,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:43,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-13 21:51:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:43,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:43,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:43,375 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 23 treesize of output 20 [2022-12-13 21:51:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:43,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93561626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:43,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:43,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 21 [2022-12-13 21:51:43,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091058019] [2022-12-13 21:51:43,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:43,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 21:51:43,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:43,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 21:51:43,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-13 21:51:44,141 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 292 [2022-12-13 21:51:44,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 472 transitions, 8227 flow. Second operand has 23 states, 23 states have (on average 107.3913043478261) internal successors, (2470), 23 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:44,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:44,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 292 [2022-12-13 21:51:44,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:47,283 INFO L130 PetriNetUnfolder]: 6032/9208 cut-off events. [2022-12-13 21:51:47,283 INFO L131 PetriNetUnfolder]: For 122992/122992 co-relation queries the response was YES. [2022-12-13 21:51:47,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67340 conditions, 9208 events. 6032/9208 cut-off events. For 122992/122992 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 54733 event pairs, 1155 based on Foata normal form. 4/9212 useless extension candidates. Maximal degree in co-relation 67078. Up to 5494 conditions per place. [2022-12-13 21:51:47,341 INFO L137 encePairwiseOnDemand]: 280/292 looper letters, 485 selfloop transitions, 416 changer transitions 18/919 dead transitions. [2022-12-13 21:51:47,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 919 transitions, 15544 flow [2022-12-13 21:51:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 21:51:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 21:51:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4310 transitions. [2022-12-13 21:51:47,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3884282624369142 [2022-12-13 21:51:47,345 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4310 transitions. [2022-12-13 21:51:47,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4310 transitions. [2022-12-13 21:51:47,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:47,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4310 transitions. [2022-12-13 21:51:47,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 113.42105263157895) internal successors, (4310), 38 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:47,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 292.0) internal successors, (11388), 39 states have internal predecessors, (11388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:47,355 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 292.0) internal successors, (11388), 39 states have internal predecessors, (11388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:47,356 INFO L175 Difference]: Start difference. First operand has 178 places, 472 transitions, 8227 flow. Second operand 38 states and 4310 transitions. [2022-12-13 21:51:47,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 919 transitions, 15544 flow [2022-12-13 21:51:47,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 919 transitions, 15267 flow, removed 68 selfloop flow, removed 9 redundant places. [2022-12-13 21:51:47,845 INFO L231 Difference]: Finished difference. Result has 227 places, 714 transitions, 13478 flow [2022-12-13 21:51:47,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=8008, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13478, PETRI_PLACES=227, PETRI_TRANSITIONS=714} [2022-12-13 21:51:47,846 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2022-12-13 21:51:47,846 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 714 transitions, 13478 flow [2022-12-13 21:51:47,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 107.3913043478261) internal successors, (2470), 23 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:47,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:47,846 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:47,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:48,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:48,048 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 650745730, now seen corresponding path program 5 times [2022-12-13 21:51:48,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:48,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996582918] [2022-12-13 21:51:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:48,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996582918] [2022-12-13 21:51:48,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996582918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:48,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162397883] [2022-12-13 21:51:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:51:48,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:48,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:48,372 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:48,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 21:51:48,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:51:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:48,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 21:51:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:48,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:48,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 21:51:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:48,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:48,732 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_837 (Array Int Int))) (<= c_~res2~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_837) c_~A~0.base) .cse0) c_~res1~0))) (forall ((v_ArrVal_837 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_837) c_~A~0.base) .cse0) c_~res1~0) (+ c_~res2~0 1))))) is different from false [2022-12-13 21:51:48,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:48,747 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 54 treesize of output 42 [2022-12-13 21:51:48,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-12-13 21:51:48,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 21:51:48,767 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 21:51:48,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2022-12-13 21:51:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-13 21:51:48,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162397883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:48,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:48,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 21:51:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131490201] [2022-12-13 21:51:48,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:48,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 21:51:48,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 21:51:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=302, Unknown=1, NotChecked=36, Total=420 [2022-12-13 21:51:48,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 292 [2022-12-13 21:51:48,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 714 transitions, 13478 flow. Second operand has 21 states, 21 states have (on average 106.28571428571429) internal successors, (2232), 21 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:48,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:48,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 292 [2022-12-13 21:51:48,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:51,337 INFO L130 PetriNetUnfolder]: 5927/9053 cut-off events. [2022-12-13 21:51:51,338 INFO L131 PetriNetUnfolder]: For 188411/189153 co-relation queries the response was YES. [2022-12-13 21:51:51,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74689 conditions, 9053 events. 5927/9053 cut-off events. For 188411/189153 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 55047 event pairs, 1310 based on Foata normal form. 460/9301 useless extension candidates. Maximal degree in co-relation 74401. Up to 8120 conditions per place. [2022-12-13 21:51:51,405 INFO L137 encePairwiseOnDemand]: 281/292 looper letters, 551 selfloop transitions, 217 changer transitions 1/787 dead transitions. [2022-12-13 21:51:51,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 787 transitions, 15883 flow [2022-12-13 21:51:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:51:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:51:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 915 transitions. [2022-12-13 21:51:51,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3916952054794521 [2022-12-13 21:51:51,407 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 915 transitions. [2022-12-13 21:51:51,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 915 transitions. [2022-12-13 21:51:51,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:51,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 915 transitions. [2022-12-13 21:51:51,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.375) internal successors, (915), 8 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:51,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 292.0) internal successors, (2628), 9 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:51,409 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 292.0) internal successors, (2628), 9 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:51,409 INFO L175 Difference]: Start difference. First operand has 227 places, 714 transitions, 13478 flow. Second operand 8 states and 915 transitions. [2022-12-13 21:51:51,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 787 transitions, 15883 flow [2022-12-13 21:51:52,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 787 transitions, 15152 flow, removed 349 selfloop flow, removed 4 redundant places. [2022-12-13 21:51:52,431 INFO L231 Difference]: Finished difference. Result has 233 places, 744 transitions, 13775 flow [2022-12-13 21:51:52,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=12747, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13775, PETRI_PLACES=233, PETRI_TRANSITIONS=744} [2022-12-13 21:51:52,431 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2022-12-13 21:51:52,432 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 744 transitions, 13775 flow [2022-12-13 21:51:52,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 106.28571428571429) internal successors, (2232), 21 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:52,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:52,432 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:52,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 21:51:52,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:52,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1113882260, now seen corresponding path program 6 times [2022-12-13 21:51:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47386246] [2022-12-13 21:51:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:53,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47386246] [2022-12-13 21:51:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47386246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337922330] [2022-12-13 21:51:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:51:53,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:53,019 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:53,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 21:51:53,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 21:51:53,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 21:51:53,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:53,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:53,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 21:51:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:53,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:53,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:53,467 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 56 treesize of output 44 [2022-12-13 21:51:53,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-12-13 21:51:53,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 21:51:53,489 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 21:51:53,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-13 21:51:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:53,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337922330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:53,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:53,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 21:51:53,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15854660] [2022-12-13 21:51:53,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:53,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:51:53,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:51:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=292, Unknown=3, NotChecked=0, Total=380 [2022-12-13 21:51:54,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 292 [2022-12-13 21:51:54,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 744 transitions, 13775 flow. Second operand has 20 states, 20 states have (on average 106.35) internal successors, (2127), 20 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:54,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:54,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 292 [2022-12-13 21:51:54,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:56,513 INFO L130 PetriNetUnfolder]: 6144/9390 cut-off events. [2022-12-13 21:51:56,514 INFO L131 PetriNetUnfolder]: For 191802/192702 co-relation queries the response was YES. [2022-12-13 21:51:56,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77301 conditions, 9390 events. 6144/9390 cut-off events. For 191802/192702 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 57635 event pairs, 1383 based on Foata normal form. 536/9707 useless extension candidates. Maximal degree in co-relation 76963. Up to 7949 conditions per place. [2022-12-13 21:51:56,601 INFO L137 encePairwiseOnDemand]: 285/292 looper letters, 558 selfloop transitions, 238 changer transitions 1/815 dead transitions. [2022-12-13 21:51:56,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 815 transitions, 16285 flow [2022-12-13 21:51:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2022-12-13 21:51:56,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3957925636007828 [2022-12-13 21:51:56,603 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2022-12-13 21:51:56,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2022-12-13 21:51:56,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:56,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2022-12-13 21:51:56,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:56,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:56,606 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:56,606 INFO L175 Difference]: Start difference. First operand has 233 places, 744 transitions, 13775 flow. Second operand 7 states and 809 transitions. [2022-12-13 21:51:56,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 815 transitions, 16285 flow [2022-12-13 21:51:57,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 815 transitions, 15982 flow, removed 63 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:57,511 INFO L231 Difference]: Finished difference. Result has 238 places, 764 transitions, 14507 flow [2022-12-13 21:51:57,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=13472, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14507, PETRI_PLACES=238, PETRI_TRANSITIONS=764} [2022-12-13 21:51:57,512 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2022-12-13 21:51:57,512 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 764 transitions, 14507 flow [2022-12-13 21:51:57,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.35) internal successors, (2127), 20 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:57,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:57,512 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:57,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 21:51:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:57,714 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:51:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 720003236, now seen corresponding path program 7 times [2022-12-13 21:51:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:57,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357136978] [2022-12-13 21:51:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357136978] [2022-12-13 21:51:58,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357136978] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370410016] [2022-12-13 21:51:58,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 21:51:58,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:58,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:58,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296e773b-7a42-48e6-81a1-b91d2b1590e0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 21:51:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 21:51:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:58,256 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 21:51:58,292 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 21:51:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:58,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:58,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:58,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 21:51:58,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 21:51:58,469 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 21:51:58,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:58,573 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_931 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset)) (+ c_~res1~0 1))) (forall ((v_ArrVal_931 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-13 21:51:58,587 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (< (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ c_~res1~0 1))) (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (<= c_~res1~0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2022-12-13 21:51:58,604 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))))) (and (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (<= (+ .cse0 c_~res1~0) (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) c_~res2~0))) (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (< (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ .cse0 c_~res1~0 1))))) is different from false [2022-12-13 21:51:58,616 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (<= (+ .cse0 c_~res1~0) (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) c_~res2~0))) (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (< (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ .cse0 c_~res1~0 1))))) is different from false [2022-12-13 21:51:58,635 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int)) (v_ArrVal_929 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_929))) (< (+ c_~res2~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1)))) (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int)) (v_ArrVal_929 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_929))) (<= (+ c_~res1~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res2~0 (select (select (store (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2022-12-13 21:51:58,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:58,645 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 52 treesize of output 41 [2022-12-13 21:51:58,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2822 treesize of output 2566 [2022-12-13 21:51:58,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2566 treesize of output 2438 [2022-12-13 21:51:58,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2438 treesize of output 2374 [2022-12-13 21:51:58,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2374 treesize of output 2246