./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12_variant.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12_variant.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 --- 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-4e7fbc6 [2022-11-23 13:40:16,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:40:16,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:40:17,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:40:17,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:40:17,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:40:17,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:40:17,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:40:17,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:40:17,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:40:17,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:40:17,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:40:17,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:40:17,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:40:17,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:40:17,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:40:17,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:40:17,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:40:17,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:40:17,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:40:17,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:40:17,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:40:17,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:40:17,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:40:17,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:40:17,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:40:17,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:40:17,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:40:17,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:40:17,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:40:17,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:40:17,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:40:17,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:40:17,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:40:17,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:40:17,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:40:17,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:40:17,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:40:17,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:40:17,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:40:17,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:40:17,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:40:17,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:40:17,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:40:17,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:40:17,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:40:17,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:40:17,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:40:17,104 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:40:17,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:40:17,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:40:17,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:40:17,106 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:40:17,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:40:17,106 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:40:17,106 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:40:17,106 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:40:17,107 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:40:17,107 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:40:17,107 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:40:17,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:40:17,108 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:40:17,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:40:17,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:40:17,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:40:17,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:40:17,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:40:17,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:40:17,109 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:40:17,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:40:17,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:40:17,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:40:17,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:40:17,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:40:17,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:40:17,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:40:17,110 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:40:17,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:40:17,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:40:17,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:40:17,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:40:17,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:40:17,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:40:17,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 [2022-11-23 13:40:17,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:40:17,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:40:17,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:40:17,423 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:40:17,423 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:40:17,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-11-23 13:40:20,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:40:20,814 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:40:20,819 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-11-23 13:40:20,843 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/data/9eab1f310/e0616f923b9441cd9509f5b3cffafc84/FLAG32c29b3fc [2022-11-23 13:40:20,859 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/data/9eab1f310/e0616f923b9441cd9509f5b3cffafc84 [2022-11-23 13:40:20,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:40:20,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:40:20,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:40:20,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:40:20,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:40:20,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:40:20" (1/1) ... [2022-11-23 13:40:20,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1e227e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:20, skipping insertion in model container [2022-11-23 13:40:20,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:40:20" (1/1) ... [2022-11-23 13:40:20,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:40:20,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:40:21,483 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_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-11-23 13:40:21,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:40:21,517 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:40:21,570 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_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-11-23 13:40:21,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:40:21,660 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:40:21,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21 WrapperNode [2022-11-23 13:40:21,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:40:21,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:40:21,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:40:21,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:40:21,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,739 INFO L138 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2022-11-23 13:40:21,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:40:21,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:40:21,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:40:21,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:40:21,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,791 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:40:21,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:40:21,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:40:21,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:40:21,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2022-11-23 13:40:21,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:40:21,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:40:21,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:40:21,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb11161-87a9-40e9-93b8-4d0b32a8b6a4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:40:21,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 13:40:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-11-23 13:40:21,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-11-23 13:40:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:40:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:40:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 13:40:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:40:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:40:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:40:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:40:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:40:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:40:21,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:40:21,899 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 13:40:22,092 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:40:22,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:40:22,262 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:40:22,304 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:40:22,305 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 13:40:22,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:40:22 BoogieIcfgContainer [2022-11-23 13:40:22,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:40:22,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:40:22,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:40:22,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:40:22,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:40:20" (1/3) ... [2022-11-23 13:40:22,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2df2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:40:22, skipping insertion in model container [2022-11-23 13:40:22,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (2/3) ... [2022-11-23 13:40:22,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2df2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:40:22, skipping insertion in model container [2022-11-23 13:40:22,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:40:22" (3/3) ... [2022-11-23 13:40:22,316 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2022-11-23 13:40:22,333 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 13:40:22,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:40:22,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:40:22,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 13:40:22,425 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 13:40:22,471 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 13:40:22,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 88 transitions, 181 flow [2022-11-23 13:40:22,487 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 88 transitions, 181 flow [2022-11-23 13:40:22,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-11-23 13:40:22,601 INFO L130 PetriNetUnfolder]: 7/100 cut-off events. [2022-11-23 13:40:22,603 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 13:40:22,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 100 events. 7/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2022-11-23 13:40:22,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 1080 [2022-11-23 13:40:26,522 INFO L134 LiptonReduction]: Checked pairs total: 1134 [2022-11-23 13:40:26,522 INFO L136 LiptonReduction]: Total number of compositions: 96 [2022-11-23 13:40:26,531 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 12 transitions, 29 flow [2022-11-23 13:40:26,543 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:26,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:40:26,577 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=FINITE_AUTOMATA, 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;@5d7ff756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:40:26,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 13:40:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 13:40:26,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:26,585 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 13:40:26,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:40:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash -705898649, now seen corresponding path program 1 times [2022-11-23 13:40:26,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:26,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468737815] [2022-11-23 13:40:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:40:26,714 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 13:40:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:40:26,754 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 13:40:26,756 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 13:40:26,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-23 13:40:26,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-23 13:40:26,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-23 13:40:26,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:40:26,763 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-23 13:40:26,765 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 13:40:26,765 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 13:40:26,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 13:40:26,789 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 13:40:26,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 125 transitions, 262 flow [2022-11-23 13:40:26,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 125 transitions, 262 flow [2022-11-23 13:40:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 125 transitions, 262 flow [2022-11-23 13:40:26,825 INFO L130 PetriNetUnfolder]: 12/151 cut-off events. [2022-11-23 13:40:26,826 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 13:40:26,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 12/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 266 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-11-23 13:40:26,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 4824 [2022-11-23 13:40:30,606 INFO L134 LiptonReduction]: Checked pairs total: 11060 [2022-11-23 13:40:30,606 INFO L136 LiptonReduction]: Total number of compositions: 116 [2022-11-23 13:40:30,607 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 34 transitions, 80 flow [2022-11-23 13:40:30,672 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 853 states, 845 states have (on average 3.0497041420118345) internal successors, (2577), 852 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:30,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:40:30,674 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=FINITE_AUTOMATA, 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;@5d7ff756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:40:30,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 13:40:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 853 states, 845 states have (on average 3.0497041420118345) internal successors, (2577), 852 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 13:40:30,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:30,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:40:30,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:40:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1336197001, now seen corresponding path program 1 times [2022-11-23 13:40:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069736954] [2022-11-23 13:40:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:40:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:40:30,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:40:30,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069736954] [2022-11-23 13:40:30,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069736954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:40:30,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:40:30,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:40:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499048540] [2022-11-23 13:40:30,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:40:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:40:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:40:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:40:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:30,973 INFO L87 Difference]: Start difference. First operand has 853 states, 845 states have (on average 3.0497041420118345) internal successors, (2577), 852 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:40:31,118 INFO L93 Difference]: Finished difference Result 829 states and 2341 transitions. [2022-11-23 13:40:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:40:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 13:40:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:40:31,151 INFO L225 Difference]: With dead ends: 829 [2022-11-23 13:40:31,152 INFO L226 Difference]: Without dead ends: 829 [2022-11-23 13:40:31,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:31,157 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:40:31,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:40:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-23 13:40:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 770. [2022-11-23 13:40:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 766 states have (on average 2.9151436031331595) internal successors, (2233), 769 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2233 transitions. [2022-11-23 13:40:31,268 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2233 transitions. Word has length 9 [2022-11-23 13:40:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:40:31,269 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 2233 transitions. [2022-11-23 13:40:31,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2233 transitions. [2022-11-23 13:40:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:40:31,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:31,271 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 13:40:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:40:31,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:40:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2110115305, now seen corresponding path program 1 times [2022-11-23 13:40:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771695778] [2022-11-23 13:40:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:40:31,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 13:40:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:40:31,342 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 13:40:31,343 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 13:40:31,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 13:40:31,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 13:40:31,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 13:40:31,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 13:40:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:40:31,344 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 13:40:31,345 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 13:40:31,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 13:40:31,365 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 13:40:31,368 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 13:40:31,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 162 transitions, 345 flow [2022-11-23 13:40:31,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 162 transitions, 345 flow [2022-11-23 13:40:31,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 345 flow [2022-11-23 13:40:31,408 INFO L130 PetriNetUnfolder]: 17/202 cut-off events. [2022-11-23 13:40:31,408 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 13:40:31,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 485 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-11-23 13:40:31,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 11232 [2022-11-23 13:40:36,129 INFO L134 LiptonReduction]: Checked pairs total: 27437 [2022-11-23 13:40:36,130 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-23 13:40:36,131 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 48 transitions, 117 flow [2022-11-23 13:40:36,538 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10224 states, 10205 states have (on average 4.110338069573738) internal successors, (41946), 10223 states have internal predecessors, (41946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:36,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:40:36,540 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=FINITE_AUTOMATA, 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;@5d7ff756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:40:36,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 13:40:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 10224 states, 10205 states have (on average 4.110338069573738) internal successors, (41946), 10223 states have internal predecessors, (41946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 13:40:36,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:36,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:40:36,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 13:40:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:36,576 INFO L85 PathProgramCache]: Analyzing trace with hash -640457107, now seen corresponding path program 1 times [2022-11-23 13:40:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74767791] [2022-11-23 13:40:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:40:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:40:36,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:40:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74767791] [2022-11-23 13:40:36,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74767791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:40:36,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:40:36,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:40:36,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4892666] [2022-11-23 13:40:36,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:40:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:40:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:40:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:40:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:36,723 INFO L87 Difference]: Start difference. First operand has 10224 states, 10205 states have (on average 4.110338069573738) internal successors, (41946), 10223 states have internal predecessors, (41946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:40:37,087 INFO L93 Difference]: Finished difference Result 9915 states and 38741 transitions. [2022-11-23 13:40:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:40:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 13:40:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:40:37,175 INFO L225 Difference]: With dead ends: 9915 [2022-11-23 13:40:37,175 INFO L226 Difference]: Without dead ends: 9915 [2022-11-23 13:40:37,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:37,177 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:40:37,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:40:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2022-11-23 13:40:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 9207. [2022-11-23 13:40:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9207 states, 9199 states have (on average 3.9876073486248504) internal successors, (36682), 9206 states have internal predecessors, (36682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 36682 transitions. [2022-11-23 13:40:37,790 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 36682 transitions. Word has length 9 [2022-11-23 13:40:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:40:37,791 INFO L495 AbstractCegarLoop]: Abstraction has 9207 states and 36682 transitions. [2022-11-23 13:40:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 36682 transitions. [2022-11-23 13:40:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:40:37,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:37,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:40:37,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:40:37,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 13:40:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -413512807, now seen corresponding path program 1 times [2022-11-23 13:40:37,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:37,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943513739] [2022-11-23 13:40:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:40:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:40:37,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:40:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943513739] [2022-11-23 13:40:37,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943513739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:40:38,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:40:38,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:40:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196551084] [2022-11-23 13:40:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:40:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:40:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:40:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:40:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:38,002 INFO L87 Difference]: Start difference. First operand 9207 states and 36682 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:40:38,318 INFO L93 Difference]: Finished difference Result 9909 states and 39437 transitions. [2022-11-23 13:40:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:40:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:40:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:40:38,433 INFO L225 Difference]: With dead ends: 9909 [2022-11-23 13:40:38,434 INFO L226 Difference]: Without dead ends: 9909 [2022-11-23 13:40:38,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:38,436 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:40:38,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:40:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9909 states. [2022-11-23 13:40:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9909 to 9909. [2022-11-23 13:40:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9901 states have (on average 3.983133016866983) internal successors, (39437), 9908 states have internal predecessors, (39437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 39437 transitions. [2022-11-23 13:40:39,233 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 39437 transitions. Word has length 12 [2022-11-23 13:40:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:40:39,234 INFO L495 AbstractCegarLoop]: Abstraction has 9909 states and 39437 transitions. [2022-11-23 13:40:39,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 39437 transitions. [2022-11-23 13:40:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:40:39,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:39,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:40:39,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:40:39,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 13:40:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1774014266, now seen corresponding path program 1 times [2022-11-23 13:40:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:39,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266983204] [2022-11-23 13:40:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:40:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:40:39,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:40:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266983204] [2022-11-23 13:40:39,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266983204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:40:39,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:40:39,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:40:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483160790] [2022-11-23 13:40:39,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:40:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:40:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:40:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:40:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:39,333 INFO L87 Difference]: Start difference. First operand 9909 states and 39437 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:40:39,690 INFO L93 Difference]: Finished difference Result 12597 states and 49023 transitions. [2022-11-23 13:40:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:40:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:40:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:40:39,764 INFO L225 Difference]: With dead ends: 12597 [2022-11-23 13:40:39,764 INFO L226 Difference]: Without dead ends: 12597 [2022-11-23 13:40:39,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:39,766 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:40:39,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:40:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12597 states. [2022-11-23 13:40:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12597 to 11701. [2022-11-23 13:40:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11701 states, 11693 states have (on average 3.970324125545198) internal successors, (46425), 11700 states have internal predecessors, (46425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11701 states to 11701 states and 46425 transitions. [2022-11-23 13:40:40,481 INFO L78 Accepts]: Start accepts. Automaton has 11701 states and 46425 transitions. Word has length 13 [2022-11-23 13:40:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:40:40,482 INFO L495 AbstractCegarLoop]: Abstraction has 11701 states and 46425 transitions. [2022-11-23 13:40:40,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11701 states and 46425 transitions. [2022-11-23 13:40:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:40:40,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:40,484 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:40:40,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:40:40,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 13:40:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash -274402065, now seen corresponding path program 1 times [2022-11-23 13:40:40,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785004350] [2022-11-23 13:40:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:40,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:40:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:40:40,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:40:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785004350] [2022-11-23 13:40:40,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785004350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:40:40,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:40:40,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:40:40,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908727315] [2022-11-23 13:40:40,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:40:40,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:40:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:40:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:40:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:40:40,724 INFO L87 Difference]: Start difference. First operand 11701 states and 46425 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:40:41,154 INFO L93 Difference]: Finished difference Result 11782 states and 46690 transitions. [2022-11-23 13:40:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:40:41,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 13:40:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:40:41,238 INFO L225 Difference]: With dead ends: 11782 [2022-11-23 13:40:41,238 INFO L226 Difference]: Without dead ends: 11782 [2022-11-23 13:40:41,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:40:41,239 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:40:41,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 32 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:40:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11782 states. [2022-11-23 13:40:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11782 to 11075. [2022-11-23 13:40:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11075 states, 11067 states have (on average 3.9706334146561852) internal successors, (43943), 11074 states have internal predecessors, (43943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11075 states to 11075 states and 43943 transitions. [2022-11-23 13:40:41,683 INFO L78 Accepts]: Start accepts. Automaton has 11075 states and 43943 transitions. Word has length 15 [2022-11-23 13:40:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:40:41,684 INFO L495 AbstractCegarLoop]: Abstraction has 11075 states and 43943 transitions. [2022-11-23 13:40:41,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 11075 states and 43943 transitions. [2022-11-23 13:40:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:40:41,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:41,686 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 13:40:41,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:40:41,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 13:40:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:41,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1266325819, now seen corresponding path program 1 times [2022-11-23 13:40:41,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:41,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227100194] [2022-11-23 13:40:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:41,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:40:41,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 13:40:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:40:41,743 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 13:40:41,744 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 13:40:41,745 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 13:40:41,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 13:40:41,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-23 13:40:41,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 13:40:41,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 13:40:41,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:40:41,747 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-23 13:40:41,747 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 13:40:41,747 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 13:40:41,784 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 13:40:41,794 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 13:40:41,795 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 199 transitions, 430 flow [2022-11-23 13:40:41,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 199 transitions, 430 flow [2022-11-23 13:40:41,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 430 flow [2022-11-23 13:40:41,858 INFO L130 PetriNetUnfolder]: 22/253 cut-off events. [2022-11-23 13:40:41,861 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 13:40:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 253 events. 22/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 695 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2022-11-23 13:40:41,880 INFO L119 LiptonReduction]: Number of co-enabled transitions 20304 [2022-11-23 13:40:46,815 INFO L134 LiptonReduction]: Checked pairs total: 51967 [2022-11-23 13:40:46,816 INFO L136 LiptonReduction]: Total number of compositions: 181 [2022-11-23 13:40:46,816 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 62 transitions, 156 flow [2022-11-23 13:40:51,026 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 113183 states, 113141 states have (on average 5.280534907769951) internal successors, (597445), 113182 states have internal predecessors, (597445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:51,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:40:51,029 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=FINITE_AUTOMATA, 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;@5d7ff756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:40:51,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 13:40:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 113183 states, 113141 states have (on average 5.280534907769951) internal successors, (597445), 113182 states have internal predecessors, (597445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 13:40:51,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:40:51,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:40:51,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 13:40:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:40:51,259 INFO L85 PathProgramCache]: Analyzing trace with hash 407592280, now seen corresponding path program 1 times [2022-11-23 13:40:51,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:40:51,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550501037] [2022-11-23 13:40:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:40:51,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:40:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:40:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:40:51,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:40:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550501037] [2022-11-23 13:40:51,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550501037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:40:51,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:40:51,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:40:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507378283] [2022-11-23 13:40:51,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:40:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:40:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:40:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:40:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:51,533 INFO L87 Difference]: Start difference. First operand has 113183 states, 113141 states have (on average 5.280534907769951) internal successors, (597445), 113182 states have internal predecessors, (597445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:40:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:40:54,049 INFO L93 Difference]: Finished difference Result 109707 states and 547697 transitions. [2022-11-23 13:40:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:40:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 13:40:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:40:55,784 INFO L225 Difference]: With dead ends: 109707 [2022-11-23 13:40:55,784 INFO L226 Difference]: Without dead ends: 109707 [2022-11-23 13:40:55,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:40:55,794 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:40:55,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 39 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:40:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109707 states. [2022-11-23 13:41:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109707 to 101871. [2022-11-23 13:41:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101871 states, 101855 states have (on average 5.0700701978302485) internal successors, (516412), 101870 states have internal predecessors, (516412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:41:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101871 states to 101871 states and 516412 transitions. [2022-11-23 13:41:01,946 INFO L78 Accepts]: Start accepts. Automaton has 101871 states and 516412 transitions. Word has length 9 [2022-11-23 13:41:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:41:01,946 INFO L495 AbstractCegarLoop]: Abstraction has 101871 states and 516412 transitions. [2022-11-23 13:41:01,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:41:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 101871 states and 516412 transitions. [2022-11-23 13:41:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:41:01,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:41:01,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:41:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:41:01,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 13:41:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:41:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1093503142, now seen corresponding path program 1 times [2022-11-23 13:41:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:41:01,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627257446] [2022-11-23 13:41:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:41:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:41:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:41:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:41:02,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:41:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627257446] [2022-11-23 13:41:02,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627257446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:41:02,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:41:02,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:41:02,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268461463] [2022-11-23 13:41:02,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:41:02,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:41:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:41:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:41:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:41:02,043 INFO L87 Difference]: Start difference. First operand 101871 states and 516412 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:41:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:41:04,057 INFO L93 Difference]: Finished difference Result 109701 states and 555521 transitions. [2022-11-23 13:41:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:41:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:41:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:41:05,675 INFO L225 Difference]: With dead ends: 109701 [2022-11-23 13:41:05,675 INFO L226 Difference]: Without dead ends: 109701 [2022-11-23 13:41:05,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:41:05,677 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:41:05,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:41:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109701 states. [2022-11-23 13:41:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109701 to 109701. [2022-11-23 13:41:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109701 states, 109685 states have (on average 5.064694352008023) internal successors, (555521), 109700 states have internal predecessors, (555521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:41:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109701 states to 109701 states and 555521 transitions. [2022-11-23 13:41:10,655 INFO L78 Accepts]: Start accepts. Automaton has 109701 states and 555521 transitions. Word has length 12 [2022-11-23 13:41:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:41:10,656 INFO L495 AbstractCegarLoop]: Abstraction has 109701 states and 555521 transitions. [2022-11-23 13:41:10,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:41:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 109701 states and 555521 transitions. [2022-11-23 13:41:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:41:10,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:41:10,657 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:41:10,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:41:10,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 13:41:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:41:10,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1703749921, now seen corresponding path program 1 times [2022-11-23 13:41:10,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:41:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758994190] [2022-11-23 13:41:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:41:10,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:41:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:41:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:41:10,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:41:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758994190] [2022-11-23 13:41:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758994190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:41:10,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:41:10,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:41:10,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384092213] [2022-11-23 13:41:10,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:41:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:41:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:41:10,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:41:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:41:10,744 INFO L87 Difference]: Start difference. First operand 109701 states and 555521 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:41:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:41:12,964 INFO L93 Difference]: Finished difference Result 139605 states and 694311 transitions. [2022-11-23 13:41:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:41:12,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:41:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:41:14,739 INFO L225 Difference]: With dead ends: 139605 [2022-11-23 13:41:14,739 INFO L226 Difference]: Without dead ends: 139605 [2022-11-23 13:41:14,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:41:14,740 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:41:14,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 39 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:41:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139605 states. [2022-11-23 13:41:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139605 to 129637.