./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- 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-6b4ec56 [2022-11-20 20:14:21,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:14:21,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:14:21,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:14:21,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:14:21,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:14:21,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:14:21,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:14:21,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:14:21,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:14:21,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:14:21,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:14:21,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:14:21,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:14:21,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:14:21,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:14:21,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:14:21,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:14:21,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:14:21,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:14:21,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:14:21,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:14:21,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:14:21,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:14:21,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:14:21,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:14:21,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:14:21,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:14:21,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:14:21,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:14:21,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:14:21,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:14:21,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:14:21,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:14:21,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:14:21,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:14:21,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:14:21,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:14:21,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:14:21,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:14:21,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:14:21,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:14:21,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:14:21,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:14:21,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:14:21,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:14:21,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:14:21,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:14:21,744 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:14:21,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:14:21,744 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:14:21,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:14:21,745 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:14:21,745 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:14:21,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:14:21,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:14:21,746 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:14:21,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:14:21,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:14:21,747 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:14:21,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:14:21,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:14:21,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:14:21,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:14:21,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:14:21,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:14:21,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:14:21,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:14:21,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:14:21,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:14:21,751 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:14:21,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:14:21,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:14:21,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:14:21,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:14:21,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:14:21,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:14:21,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:14:21,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:14:21,753 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:14:21,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:14:21,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:14:21,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:14:21,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:14:21,754 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_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2022-11-20 20:14:21,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:14:22,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:14:22,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:14:22,006 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:14:22,006 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:14:22,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-11-20 20:14:25,146 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:14:25,438 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:14:25,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-11-20 20:14:25,453 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/data/9cfcf9143/fdde68116af648b1aeca060aeb8ffd96/FLAGf12057edc [2022-11-20 20:14:25,472 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/data/9cfcf9143/fdde68116af648b1aeca060aeb8ffd96 [2022-11-20 20:14:25,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:14:25,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:14:25,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:14:25,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:14:25,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:14:25,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:14:25" (1/1) ... [2022-11-20 20:14:25,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567c6f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:25, skipping insertion in model container [2022-11-20 20:14:25,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:14:25" (1/1) ... [2022-11-20 20:14:25,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:14:25,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:14:25,945 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_633357e5-dd35-4254-a379-e02a373983c1/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-11-20 20:14:25,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:14:25,991 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:14:26,031 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_633357e5-dd35-4254-a379-e02a373983c1/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-11-20 20:14:26,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:14:26,082 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:14:26,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26 WrapperNode [2022-11-20 20:14:26,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:14:26,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:14:26,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:14:26,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:14:26,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,151 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-20 20:14:26,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:14:26,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:14:26,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:14:26,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:14:26,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:14:26,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:14:26,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:14:26,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:14:26,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (1/1) ... [2022-11-20 20:14:26,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:14:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:26,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:14:26,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:14:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:14:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:14:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 20:14:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:14:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:14:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 20:14:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 20:14:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:14:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:14:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:14:26,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:14:26,269 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:14:26,462 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:14:26,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:14:26,902 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:14:26,910 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:14:26,920 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-20 20:14:26,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:14:26 BoogieIcfgContainer [2022-11-20 20:14:26,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:14:26,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:14:26,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:14:26,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:14:26,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:14:25" (1/3) ... [2022-11-20 20:14:26,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cafff89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:14:26, skipping insertion in model container [2022-11-20 20:14:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:26" (2/3) ... [2022-11-20 20:14:26,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cafff89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:14:26, skipping insertion in model container [2022-11-20 20:14:26,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:14:26" (3/3) ... [2022-11-20 20:14:26,943 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2022-11-20 20:14:26,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:14:26,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-20 20:14:26,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:14:27,074 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 20:14:27,108 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:14:27,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 135 transitions, 278 flow [2022-11-20 20:14:27,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 135 transitions, 278 flow [2022-11-20 20:14:27,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 278 flow [2022-11-20 20:14:27,213 INFO L130 PetriNetUnfolder]: 17/182 cut-off events. [2022-11-20 20:14:27,217 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 20:14:27,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 17/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 551 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2022-11-20 20:14:27,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 4240 [2022-11-20 20:14:32,403 INFO L134 LiptonReduction]: Checked pairs total: 8772 [2022-11-20 20:14:32,403 INFO L136 LiptonReduction]: Total number of compositions: 127 [2022-11-20 20:14:32,411 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 50 transitions, 108 flow [2022-11-20 20:14:32,450 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 398 states, 291 states have (on average 3.1512027491408934) internal successors, (917), 397 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:32,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:14:32,481 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3cd31f3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:14:32,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-20 20:14:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 398 states, 291 states have (on average 3.1512027491408934) internal successors, (917), 397 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:14:32,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:32,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:14:32,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-20 20:14:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 16631, now seen corresponding path program 1 times [2022-11-20 20:14:32,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:32,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409870242] [2022-11-20 20:14:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:32,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:32,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409870242] [2022-11-20 20:14:32,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409870242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:32,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:32,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:14:32,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081738731] [2022-11-20 20:14:32,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:32,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:14:32,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:14:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:32,913 INFO L87 Difference]: Start difference. First operand has 398 states, 291 states have (on average 3.1512027491408934) internal successors, (917), 397 states have internal predecessors, (917), 0 states have call successors, (0), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:33,088 INFO L93 Difference]: Finished difference Result 322 states and 594 transitions. [2022-11-20 20:14:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 20:14:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:33,117 INFO L225 Difference]: With dead ends: 322 [2022-11-20 20:14:33,117 INFO L226 Difference]: Without dead ends: 318 [2022-11-20 20:14:33,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:33,127 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:33,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 5 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:14:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-20 20:14:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-11-20 20:14:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 251 states have (on average 2.3386454183266934) internal successors, (587), 317 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 587 transitions. [2022-11-20 20:14:33,219 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 587 transitions. Word has length 2 [2022-11-20 20:14:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:33,219 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 587 transitions. [2022-11-20 20:14:33,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 587 transitions. [2022-11-20 20:14:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:14:33,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:33,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:14:33,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:14:33,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-20 20:14:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash 16629, now seen corresponding path program 1 times [2022-11-20 20:14:33,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:33,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829614715] [2022-11-20 20:14:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:33,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829614715] [2022-11-20 20:14:33,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829614715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:33,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:33,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:14:33,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324420645] [2022-11-20 20:14:33,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:33,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:14:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:14:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:33,387 INFO L87 Difference]: Start difference. First operand 318 states and 587 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:33,480 INFO L93 Difference]: Finished difference Result 310 states and 578 transitions. [2022-11-20 20:14:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 20:14:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:33,483 INFO L225 Difference]: With dead ends: 310 [2022-11-20 20:14:33,483 INFO L226 Difference]: Without dead ends: 310 [2022-11-20 20:14:33,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:33,486 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:33,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:14:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-20 20:14:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-11-20 20:14:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 247 states have (on average 2.340080971659919) internal successors, (578), 309 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 578 transitions. [2022-11-20 20:14:33,504 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 578 transitions. Word has length 2 [2022-11-20 20:14:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:33,505 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 578 transitions. [2022-11-20 20:14:33,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 578 transitions. [2022-11-20 20:14:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:14:33,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:33,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:14:33,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:14:33,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-20 20:14:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 495787973, now seen corresponding path program 1 times [2022-11-20 20:14:33,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:33,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191330982] [2022-11-20 20:14:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:33,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191330982] [2022-11-20 20:14:33,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191330982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:14:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094309961] [2022-11-20 20:14:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:33,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:33,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:33,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:14:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:14:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:33,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:14:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:34,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094309961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:34,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239004247] [2022-11-20 20:14:34,071 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:14:34,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:14:34,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 20:14:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621265383] [2022-11-20 20:14:34,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:14:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:14:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:14:34,075 INFO L87 Difference]: Start difference. First operand 310 states and 578 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-11-20 20:14:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:34,187 INFO L93 Difference]: Finished difference Result 75 states and 125 transitions. [2022-11-20 20:14:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:14:34,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 5 [2022-11-20 20:14:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:34,188 INFO L225 Difference]: With dead ends: 75 [2022-11-20 20:14:34,188 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 20:14:34,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:14:34,190 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:34,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:14:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 20:14:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-20 20:14:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.838235294117647) internal successors, (125), 74 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 125 transitions. [2022-11-20 20:14:34,194 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 125 transitions. Word has length 5 [2022-11-20 20:14:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:34,194 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 125 transitions. [2022-11-20 20:14:34,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-11-20 20:14:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 125 transitions. [2022-11-20 20:14:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:14:34,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:34,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:14:34,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:14:34,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:34,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-20 20:14:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:34,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1810471312, now seen corresponding path program 1 times [2022-11-20 20:14:34,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75835771] [2022-11-20 20:14:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:34,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:34,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75835771] [2022-11-20 20:14:34,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75835771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:34,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:34,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:14:34,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252757002] [2022-11-20 20:14:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:34,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:14:34,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:14:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:14:34,595 INFO L87 Difference]: Start difference. First operand 75 states and 125 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:34,622 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2022-11-20 20:14:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-20 20:14:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:34,623 INFO L225 Difference]: With dead ends: 67 [2022-11-20 20:14:34,624 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 20:14:34,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:14:34,625 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:34,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:14:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 20:14:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-20 20:14:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 66 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 111 transitions. [2022-11-20 20:14:34,628 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 111 transitions. Word has length 6 [2022-11-20 20:14:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:34,628 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 111 transitions. [2022-11-20 20:14:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 111 transitions. [2022-11-20 20:14:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:14:34,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:34,629 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 20:14:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:14:34,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-20 20:14:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1810441628, now seen corresponding path program 1 times [2022-11-20 20:14:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:34,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15004566] [2022-11-20 20:14:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:14:34,642 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:14:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:14:34,667 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:14:34,667 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:14:34,668 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-11-20 20:14:34,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-11-20 20:14:34,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-11-20 20:14:34,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-11-20 20:14:34,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-11-20 20:14:34,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-11-20 20:14:34,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-11-20 20:14:34,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-11-20 20:14:34,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-11-20 20:14:34,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-11-20 20:14:34,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-11-20 20:14:34,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-11-20 20:14:34,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-11-20 20:14:34,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-11-20 20:14:34,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-11-20 20:14:34,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-11-20 20:14:34,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-11-20 20:14:34,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-11-20 20:14:34,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-11-20 20:14:34,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-11-20 20:14:34,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-11-20 20:14:34,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-11-20 20:14:34,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-11-20 20:14:34,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-11-20 20:14:34,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-11-20 20:14:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:14:34,677 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 20:14:34,678 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:14:34,679 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 20:14:34,703 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 20:14:34,706 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:14:34,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 177 transitions, 372 flow [2022-11-20 20:14:34,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 177 transitions, 372 flow [2022-11-20 20:14:34,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2022-11-20 20:14:34,768 INFO L130 PetriNetUnfolder]: 31/301 cut-off events. [2022-11-20 20:14:34,768 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 20:14:34,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 31/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1074 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2022-11-20 20:14:34,781 INFO L119 LiptonReduction]: Number of co-enabled transitions 12560 [2022-11-20 20:14:40,036 INFO L134 LiptonReduction]: Checked pairs total: 29637 [2022-11-20 20:14:40,036 INFO L136 LiptonReduction]: Total number of compositions: 166 [2022-11-20 20:14:40,037 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 79 transitions, 176 flow [2022-11-20 20:14:40,374 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8599 states, 7583 states have (on average 3.983779506791507) internal successors, (30209), 8598 states have internal predecessors, (30209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:40,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:14:40,379 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3cd31f3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:14:40,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-20 20:14:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 8599 states, 7583 states have (on average 3.983779506791507) internal successors, (30209), 8598 states have internal predecessors, (30209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:14:40,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:40,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:14:40,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 20:14:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash 28898, now seen corresponding path program 1 times [2022-11-20 20:14:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:40,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656555630] [2022-11-20 20:14:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:40,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:40,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656555630] [2022-11-20 20:14:40,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656555630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:40,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:40,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:14:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529376546] [2022-11-20 20:14:40,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:40,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:14:40,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:14:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:40,508 INFO L87 Difference]: Start difference. First operand has 8599 states, 7583 states have (on average 3.983779506791507) internal successors, (30209), 8598 states have internal predecessors, (30209), 0 states have call successors, (0), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:40,731 INFO L93 Difference]: Finished difference Result 7013 states and 19441 transitions. [2022-11-20 20:14:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 20:14:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:40,775 INFO L225 Difference]: With dead ends: 7013 [2022-11-20 20:14:40,775 INFO L226 Difference]: Without dead ends: 6997 [2022-11-20 20:14:40,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:40,776 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:40,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:14:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2022-11-20 20:14:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 6997. [2022-11-20 20:14:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6997 states, 6367 states have (on average 3.047117951939689) internal successors, (19401), 6996 states have internal predecessors, (19401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6997 states to 6997 states and 19401 transitions. [2022-11-20 20:14:41,107 INFO L78 Accepts]: Start accepts. Automaton has 6997 states and 19401 transitions. Word has length 2 [2022-11-20 20:14:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:41,108 INFO L495 AbstractCegarLoop]: Abstraction has 6997 states and 19401 transitions. [2022-11-20 20:14:41,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 6997 states and 19401 transitions. [2022-11-20 20:14:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:14:41,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:41,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:14:41,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:14:41,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 20:14:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:41,109 INFO L85 PathProgramCache]: Analyzing trace with hash 28900, now seen corresponding path program 1 times [2022-11-20 20:14:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:41,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532685745] [2022-11-20 20:14:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:41,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:41,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532685745] [2022-11-20 20:14:41,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532685745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:41,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:41,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:14:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884816525] [2022-11-20 20:14:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:14:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:14:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:41,140 INFO L87 Difference]: Start difference. First operand 6997 states and 19401 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:41,303 INFO L93 Difference]: Finished difference Result 6293 states and 17422 transitions. [2022-11-20 20:14:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 20:14:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:41,357 INFO L225 Difference]: With dead ends: 6293 [2022-11-20 20:14:41,358 INFO L226 Difference]: Without dead ends: 6293 [2022-11-20 20:14:41,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:41,360 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:41,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 11 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:14:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2022-11-20 20:14:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6293. [2022-11-20 20:14:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 5784 states have (on average 3.0121023513139695) internal successors, (17422), 6292 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 17422 transitions. [2022-11-20 20:14:41,631 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 17422 transitions. Word has length 2 [2022-11-20 20:14:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:41,631 INFO L495 AbstractCegarLoop]: Abstraction has 6293 states and 17422 transitions. [2022-11-20 20:14:41,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 17422 transitions. [2022-11-20 20:14:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:14:41,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:41,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:14:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:14:41,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 20:14:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash 940900189, now seen corresponding path program 1 times [2022-11-20 20:14:41,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:41,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672789115] [2022-11-20 20:14:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:41,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:41,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:41,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672789115] [2022-11-20 20:14:41,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672789115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:41,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:41,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:14:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517389938] [2022-11-20 20:14:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:41,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:14:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:14:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:14:41,749 INFO L87 Difference]: Start difference. First operand 6293 states and 17422 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:41,894 INFO L93 Difference]: Finished difference Result 5017 states and 13784 transitions. [2022-11-20 20:14:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:14:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-20 20:14:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:41,918 INFO L225 Difference]: With dead ends: 5017 [2022-11-20 20:14:41,918 INFO L226 Difference]: Without dead ends: 5017 [2022-11-20 20:14:41,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:14:41,919 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:41,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 11 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:14:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2022-11-20 20:14:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 5017. [2022-11-20 20:14:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5017 states, 4744 states have (on average 2.905564924114671) internal successors, (13784), 5016 states have internal predecessors, (13784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5017 states to 5017 states and 13784 transitions. [2022-11-20 20:14:42,121 INFO L78 Accepts]: Start accepts. Automaton has 5017 states and 13784 transitions. Word has length 6 [2022-11-20 20:14:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:42,121 INFO L495 AbstractCegarLoop]: Abstraction has 5017 states and 13784 transitions. [2022-11-20 20:14:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5017 states and 13784 transitions. [2022-11-20 20:14:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:14:42,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:42,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:14:42,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:14:42,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 20:14:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 940699663, now seen corresponding path program 1 times [2022-11-20 20:14:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679686691] [2022-11-20 20:14:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:42,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679686691] [2022-11-20 20:14:42,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679686691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:14:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321719813] [2022-11-20 20:14:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:42,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:42,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:42,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:42,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:14:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:14:42,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:42,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:14:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:42,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321719813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:42,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146076207] [2022-11-20 20:14:42,439 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:14:42,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:14:42,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 20:14:42,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283428294] [2022-11-20 20:14:42,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:42,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:14:42,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:42,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:14:42,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:14:42,445 INFO L87 Difference]: Start difference. First operand 5017 states and 13784 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:42,655 INFO L93 Difference]: Finished difference Result 1347 states and 3551 transitions. [2022-11-20 20:14:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:14:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 6 [2022-11-20 20:14:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:42,661 INFO L225 Difference]: With dead ends: 1347 [2022-11-20 20:14:42,661 INFO L226 Difference]: Without dead ends: 1347 [2022-11-20 20:14:42,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:14:42,662 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 194 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:42,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 43 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:14:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-11-20 20:14:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1347. [2022-11-20 20:14:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1322 states have (on average 2.6860816944024206) internal successors, (3551), 1346 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 3551 transitions. [2022-11-20 20:14:42,697 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 3551 transitions. Word has length 6 [2022-11-20 20:14:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:42,697 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 3551 transitions. [2022-11-20 20:14:42,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 3551 transitions. [2022-11-20 20:14:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:14:42,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:42,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:42,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:14:42,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:42,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 20:14:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash -896867178, now seen corresponding path program 1 times [2022-11-20 20:14:42,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:42,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526508916] [2022-11-20 20:14:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:42,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:42,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526508916] [2022-11-20 20:14:42,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526508916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:42,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:42,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:14:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952221410] [2022-11-20 20:14:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:42,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:14:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:42,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:14:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:14:42,975 INFO L87 Difference]: Start difference. First operand 1347 states and 3551 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:43,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:43,033 INFO L93 Difference]: Finished difference Result 771 states and 1991 transitions. [2022-11-20 20:14:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:43,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-20 20:14:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:43,036 INFO L225 Difference]: With dead ends: 771 [2022-11-20 20:14:43,036 INFO L226 Difference]: Without dead ends: 771 [2022-11-20 20:14:43,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:14:43,037 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:43,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:14:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-20 20:14:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-20 20:14:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.585714285714286) internal successors, (1991), 770 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1991 transitions. [2022-11-20 20:14:43,055 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1991 transitions. Word has length 7 [2022-11-20 20:14:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:43,055 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1991 transitions. [2022-11-20 20:14:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1991 transitions. [2022-11-20 20:14:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:14:43,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:43,057 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:14:43,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:14:43,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 20:14:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -116776666, now seen corresponding path program 1 times [2022-11-20 20:14:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:43,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755468725] [2022-11-20 20:14:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:43,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:14:43,070 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:14:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:14:43,082 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:14:43,082 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:14:43,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-11-20 20:14:43,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-11-20 20:14:43,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-11-20 20:14:43,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-11-20 20:14:43,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-11-20 20:14:43,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-11-20 20:14:43,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-11-20 20:14:43,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-11-20 20:14:43,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-11-20 20:14:43,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-11-20 20:14:43,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-11-20 20:14:43,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-11-20 20:14:43,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-11-20 20:14:43,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-11-20 20:14:43,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-11-20 20:14:43,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-11-20 20:14:43,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-11-20 20:14:43,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-11-20 20:14:43,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-11-20 20:14:43,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-11-20 20:14:43,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-11-20 20:14:43,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-11-20 20:14:43,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-11-20 20:14:43,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-11-20 20:14:43,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-11-20 20:14:43,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-11-20 20:14:43,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-11-20 20:14:43,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-11-20 20:14:43,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-11-20 20:14:43,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-11-20 20:14:43,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-11-20 20:14:43,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-11-20 20:14:43,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-11-20 20:14:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:14:43,089 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 20:14:43,090 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:14:43,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 20:14:43,114 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 20:14:43,117 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:14:43,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 219 transitions, 468 flow [2022-11-20 20:14:43,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 219 transitions, 468 flow [2022-11-20 20:14:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2022-11-20 20:14:43,211 INFO L130 PetriNetUnfolder]: 50/463 cut-off events. [2022-11-20 20:14:43,211 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 20:14:43,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 50/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1818 event pairs, 1 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2022-11-20 20:14:43,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 24000 [2022-11-20 20:14:49,226 INFO L134 LiptonReduction]: Checked pairs total: 68296 [2022-11-20 20:14:49,226 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-20 20:14:49,227 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 89 places, 105 transitions, 240 flow [2022-11-20 20:14:55,563 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 175559 states, 166002 states have (on average 4.95662100456621) internal successors, (822809), 175558 states have internal predecessors, (822809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:55,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:14:55,574 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3cd31f3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:14:55,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-20 20:14:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 175559 states, 166002 states have (on average 4.95662100456621) internal successors, (822809), 175558 states have internal predecessors, (822809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:14:55,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:55,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:14:55,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:14:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash 43586, now seen corresponding path program 1 times [2022-11-20 20:14:55,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:55,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558884347] [2022-11-20 20:14:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:55,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:55,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:55,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558884347] [2022-11-20 20:14:55,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558884347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:55,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:55,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:14:55,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183524543] [2022-11-20 20:14:55,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:55,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:14:55,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:14:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:14:56,177 INFO L87 Difference]: Start difference. First operand has 175559 states, 166002 states have (on average 4.95662100456621) internal successors, (822809), 175558 states have internal predecessors, (822809), 0 states have call successors, (0), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:58,569 INFO L93 Difference]: Finished difference Result 116279 states and 429035 transitions. [2022-11-20 20:14:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:14:58,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 20:14:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:00,302 INFO L225 Difference]: With dead ends: 116279 [2022-11-20 20:15:00,302 INFO L226 Difference]: Without dead ends: 116215 [2022-11-20 20:15:00,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:00,304 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:00,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 13 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116215 states. [2022-11-20 20:15:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116215 to 116215. [2022-11-20 20:15:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116215 states, 112402 states have (on average 3.8151189480614223) internal successors, (428827), 116214 states have internal predecessors, (428827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116215 states to 116215 states and 428827 transitions. [2022-11-20 20:15:06,957 INFO L78 Accepts]: Start accepts. Automaton has 116215 states and 428827 transitions. Word has length 2 [2022-11-20 20:15:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:06,957 INFO L495 AbstractCegarLoop]: Abstraction has 116215 states and 428827 transitions. [2022-11-20 20:15:06,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 116215 states and 428827 transitions. [2022-11-20 20:15:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:15:06,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:06,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:15:06,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:15:06,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:15:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash 43587, now seen corresponding path program 1 times [2022-11-20 20:15:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:06,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043673972] [2022-11-20 20:15:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:07,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043673972] [2022-11-20 20:15:07,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043673972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:07,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:07,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671161409] [2022-11-20 20:15:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:07,004 INFO L87 Difference]: Start difference. First operand 116215 states and 428827 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:08,753 INFO L93 Difference]: Finished difference Result 116207 states and 428818 transitions. [2022-11-20 20:15:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 20:15:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:09,489 INFO L225 Difference]: With dead ends: 116207 [2022-11-20 20:15:09,489 INFO L226 Difference]: Without dead ends: 116207 [2022-11-20 20:15:09,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:09,490 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:09,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116207 states. [2022-11-20 20:15:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116207 to 116207. [2022-11-20 20:15:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116207 states, 112398 states have (on average 3.815174647235716) internal successors, (428818), 116206 states have internal predecessors, (428818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116207 states to 116207 states and 428818 transitions. [2022-11-20 20:15:15,478 INFO L78 Accepts]: Start accepts. Automaton has 116207 states and 428818 transitions. Word has length 2 [2022-11-20 20:15:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:15,478 INFO L495 AbstractCegarLoop]: Abstraction has 116207 states and 428818 transitions. [2022-11-20 20:15:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 116207 states and 428818 transitions. [2022-11-20 20:15:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:15:15,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:15,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:15:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:15:15,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:15:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1631933293, now seen corresponding path program 1 times [2022-11-20 20:15:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:15,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164263682] [2022-11-20 20:15:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:15,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:15,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164263682] [2022-11-20 20:15:15,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164263682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:15,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:15,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:15,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301713574] [2022-11-20 20:15:15,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:15,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:15,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:15,593 INFO L87 Difference]: Start difference. First operand 116207 states and 428818 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:17,301 INFO L93 Difference]: Finished difference Result 82649 states and 302426 transitions. [2022-11-20 20:15:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:15:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-20 20:15:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:17,748 INFO L225 Difference]: With dead ends: 82649 [2022-11-20 20:15:17,748 INFO L226 Difference]: Without dead ends: 82649 [2022-11-20 20:15:17,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:17,749 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:17,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 13 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82649 states. [2022-11-20 20:15:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82649 to 82649. [2022-11-20 20:15:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82649 states, 81140 states have (on average 3.727212225782598) internal successors, (302426), 82648 states have internal predecessors, (302426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82649 states to 82649 states and 302426 transitions. [2022-11-20 20:15:21,527 INFO L78 Accepts]: Start accepts. Automaton has 82649 states and 302426 transitions. Word has length 6 [2022-11-20 20:15:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:21,527 INFO L495 AbstractCegarLoop]: Abstraction has 82649 states and 302426 transitions. [2022-11-20 20:15:21,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 82649 states and 302426 transitions. [2022-11-20 20:15:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:15:21,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:21,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:15:21,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:15:21,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:15:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1631671821, now seen corresponding path program 1 times [2022-11-20 20:15:21,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:21,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422437958] [2022-11-20 20:15:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:21,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422437958] [2022-11-20 20:15:21,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422437958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:15:21,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939669172] [2022-11-20 20:15:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:21,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:21,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:21,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:21,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:15:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:21,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:15:21,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:21,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:15:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:21,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:21,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939669172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:21,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874080264] [2022-11-20 20:15:21,876 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:15:21,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:15:21,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 20:15:21,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984318570] [2022-11-20 20:15:21,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:15:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:15:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:15:21,880 INFO L87 Difference]: Start difference. First operand 82649 states and 302426 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:22,395 INFO L93 Difference]: Finished difference Result 21571 states and 77055 transitions. [2022-11-20 20:15:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 6 [2022-11-20 20:15:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:22,499 INFO L225 Difference]: With dead ends: 21571 [2022-11-20 20:15:22,499 INFO L226 Difference]: Without dead ends: 21571 [2022-11-20 20:15:22,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:15:22,501 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 429 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:22,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 64 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21571 states. [2022-11-20 20:15:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21571 to 21571. [2022-11-20 20:15:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21571 states, 21446 states have (on average 3.592977711461345) internal successors, (77055), 21570 states have internal predecessors, (77055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21571 states to 21571 states and 77055 transitions. [2022-11-20 20:15:24,023 INFO L78 Accepts]: Start accepts. Automaton has 21571 states and 77055 transitions. Word has length 6 [2022-11-20 20:15:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:24,023 INFO L495 AbstractCegarLoop]: Abstraction has 21571 states and 77055 transitions. [2022-11-20 20:15:24,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 21571 states and 77055 transitions. [2022-11-20 20:15:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:15:24,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:24,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:24,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:15:24,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633357e5-dd35-4254-a379-e02a373983c1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 20:15:24,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:15:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash -949675605, now seen corresponding path program 1 times [2022-11-20 20:15:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:24,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677115793] [2022-11-20 20:15:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:24,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677115793] [2022-11-20 20:15:24,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677115793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:24,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:24,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874126956] [2022-11-20 20:15:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:24,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:24,377 INFO L87 Difference]: Start difference. First operand 21571 states and 77055 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:24,520 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-20 20:15:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-20 20:15:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:24,549 INFO L225 Difference]: With dead ends: 9267 [2022-11-20 20:15:24,549 INFO L226 Difference]: Without dead ends: 9267 [2022-11-20 20:15:24,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:24,550 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:24,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 7 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-20 20:15:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-20 20:15:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.496546514137708) internal successors, (32399), 9266 states have internal predecessors, (32399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-20 20:15:24,764 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 7 [2022-11-20 20:15:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:24,765 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-20 20:15:24,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-20 20:15:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:15:24,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:24,767 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 20:15:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 20:15:24,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:15:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1095620689, now seen corresponding path program 1 times [2022-11-20 20:15:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:24,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264426308] [2022-11-20 20:15:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:15:24,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:15:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:15:24,807 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:15:24,807 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:15:24,807 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2022-11-20 20:15:24,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2022-11-20 20:15:24,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2022-11-20 20:15:24,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2022-11-20 20:15:24,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2022-11-20 20:15:24,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2022-11-20 20:15:24,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2022-11-20 20:15:24,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2022-11-20 20:15:24,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2022-11-20 20:15:24,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2022-11-20 20:15:24,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2022-11-20 20:15:24,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2022-11-20 20:15:24,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2022-11-20 20:15:24,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2022-11-20 20:15:24,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2022-11-20 20:15:24,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2022-11-20 20:15:24,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2022-11-20 20:15:24,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2022-11-20 20:15:24,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2022-11-20 20:15:24,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2022-11-20 20:15:24,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2022-11-20 20:15:24,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2022-11-20 20:15:24,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2022-11-20 20:15:24,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2022-11-20 20:15:24,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2022-11-20 20:15:24,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2022-11-20 20:15:24,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2022-11-20 20:15:24,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2022-11-20 20:15:24,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2022-11-20 20:15:24,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2022-11-20 20:15:24,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2022-11-20 20:15:24,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2022-11-20 20:15:24,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2022-11-20 20:15:24,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2022-11-20 20:15:24,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2022-11-20 20:15:24,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2022-11-20 20:15:24,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2022-11-20 20:15:24,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2022-11-20 20:15:24,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2022-11-20 20:15:24,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2022-11-20 20:15:24,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2022-11-20 20:15:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 20:15:24,817 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 20:15:24,817 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:15:24,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 20:15:24,849 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 20:15:24,853 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:15:24,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 566 flow [2022-11-20 20:15:24,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 566 flow [2022-11-20 20:15:24,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 566 flow [2022-11-20 20:15:25,012 INFO L130 PetriNetUnfolder]: 81/713 cut-off events. [2022-11-20 20:15:25,012 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 20:15:25,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 713 events. 81/713 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3207 event pairs, 6 based on Foata normal form. 0/527 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2022-11-20 20:15:25,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 38880 [2022-11-20 20:15:32,464 INFO L134 LiptonReduction]: Checked pairs total: 108259 [2022-11-20 20:15:32,464 INFO L136 LiptonReduction]: Total number of compositions: 241 [2022-11-20 20:15:32,469 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 111 places, 132 transitions, 308 flow