./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- 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-8393723 [2022-11-18 20:28:58,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:28:58,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:28:58,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:28:59,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:28:59,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:28:59,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:28:59,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:28:59,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:28:59,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:28:59,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:28:59,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:28:59,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:28:59,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:28:59,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:28:59,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:28:59,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:28:59,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:28:59,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:28:59,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:28:59,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:28:59,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:28:59,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:28:59,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:28:59,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:28:59,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:28:59,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:28:59,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:28:59,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:28:59,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:28:59,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:28:59,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:28:59,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:28:59,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:28:59,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:28:59,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:28:59,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:28:59,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:28:59,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:28:59,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:28:59,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:28:59,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:28:59,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:28:59,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:28:59,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:28:59,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:28:59,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:28:59,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:28:59,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:28:59,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:28:59,121 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:28:59,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:28:59,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:28:59,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:28:59,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:28:59,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:28:59,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:28:59,123 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:28:59,124 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:28:59,124 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:28:59,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:28:59,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:28:59,125 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:28:59,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:28:59,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:28:59,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:28:59,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:28:59,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:28:59,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:28:59,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:28:59,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:28:59,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:28:59,128 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_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2022-11-18 20:28:59,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:28:59,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:28:59,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:28:59,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:28:59,573 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:28:59,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-11-18 20:28:59,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/data/16657fe00/74c3fe9fe6924f1ebaa08231a04a7ef2/FLAG812070fef [2022-11-18 20:29:00,342 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:29:00,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-11-18 20:29:00,364 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/data/16657fe00/74c3fe9fe6924f1ebaa08231a04a7ef2/FLAG812070fef [2022-11-18 20:29:00,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/data/16657fe00/74c3fe9fe6924f1ebaa08231a04a7ef2 [2022-11-18 20:29:00,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:29:00,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:29:00,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:29:00,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:29:00,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:29:00,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:29:00" (1/1) ... [2022-11-18 20:29:00,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a731f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:00, skipping insertion in model container [2022-11-18 20:29:00,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:29:00" (1/1) ... [2022-11-18 20:29:00,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:29:00,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:29:01,132 WARN L234 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_396b6668-363f-4bce-a1b2-5a577ca60e79/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-11-18 20:29:01,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:29:01,171 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:29:01,210 WARN L234 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_396b6668-363f-4bce-a1b2-5a577ca60e79/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-11-18 20:29:01,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:29:01,260 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:29:01,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01 WrapperNode [2022-11-18 20:29:01,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:29:01,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:29:01,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:29:01,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:29:01,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,354 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-18 20:29:01,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:29:01,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:29:01,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:29:01,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:29:01,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,412 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:29:01,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:29:01,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:29:01,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:29:01,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (1/1) ... [2022-11-18 20:29:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:29:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:01,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:29:01,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:29:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 20:29:01,535 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 20:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:29:01,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:29:01,537 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:29:01,764 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:29:01,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:29:02,201 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:29:02,210 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:29:02,219 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-18 20:29:02,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:29:02 BoogieIcfgContainer [2022-11-18 20:29:02,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:29:02,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:29:02,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:29:02,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:29:02,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:29:00" (1/3) ... [2022-11-18 20:29:02,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d94fc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:29:02, skipping insertion in model container [2022-11-18 20:29:02,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:01" (2/3) ... [2022-11-18 20:29:02,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d94fc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:29:02, skipping insertion in model container [2022-11-18 20:29:02,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:29:02" (3/3) ... [2022-11-18 20:29:02,240 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2022-11-18 20:29:02,265 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:29:02,265 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-18 20:29:02,265 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:29:02,401 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 20:29:02,485 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:29:02,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 132 transitions, 272 flow [2022-11-18 20:29:02,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 132 transitions, 272 flow [2022-11-18 20:29:02,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 132 transitions, 272 flow [2022-11-18 20:29:02,622 INFO L130 PetriNetUnfolder]: 17/176 cut-off events. [2022-11-18 20:29:02,623 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:29:02,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 176 events. 17/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 534 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2022-11-18 20:29:02,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 4000 [2022-11-18 20:29:08,620 INFO L134 LiptonReduction]: Checked pairs total: 7814 [2022-11-18 20:29:08,621 INFO L136 LiptonReduction]: Total number of compositions: 124 [2022-11-18 20:29:08,631 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 48 transitions, 104 flow [2022-11-18 20:29:08,686 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 377 states, 270 states have (on average 3.1481481481481484) internal successors, (850), 376 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:08,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:29:08,730 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;@3c19280, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:29:08,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-18 20:29:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 270 states have (on average 3.1481481481481484) internal successors, (850), 376 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:29:08,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:08,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:29:08,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-18 20:29:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash 16318, now seen corresponding path program 1 times [2022-11-18 20:29:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503297291] [2022-11-18 20:29:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:08,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:09,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:09,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503297291] [2022-11-18 20:29:09,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503297291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:09,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:09,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:29:09,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101391203] [2022-11-18 20:29:09,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:09,117 INFO L87 Difference]: Start difference. First operand has 377 states, 270 states have (on average 3.1481481481481484) internal successors, (850), 376 states have internal predecessors, (850), 0 states have call successors, (0), 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) [2022-11-18 20:29:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:09,237 INFO L93 Difference]: Finished difference Result 303 states and 558 transitions. [2022-11-18 20:29:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:09,241 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 [2022-11-18 20:29:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:09,254 INFO L225 Difference]: With dead ends: 303 [2022-11-18 20:29:09,255 INFO L226 Difference]: Without dead ends: 299 [2022-11-18 20:29:09,256 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 [2022-11-18 20:29:09,260 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:09,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 5 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-18 20:29:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-18 20:29:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 232 states have (on average 2.375) internal successors, (551), 298 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 551 transitions. [2022-11-18 20:29:09,328 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 551 transitions. Word has length 2 [2022-11-18 20:29:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:09,328 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 551 transitions. [2022-11-18 20:29:09,329 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) [2022-11-18 20:29:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 551 transitions. [2022-11-18 20:29:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:29:09,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:09,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:29:09,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:29:09,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-18 20:29:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash 16319, now seen corresponding path program 1 times [2022-11-18 20:29:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:09,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433552390] [2022-11-18 20:29:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:09,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:09,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:09,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433552390] [2022-11-18 20:29:09,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433552390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:09,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:09,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:29:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946469935] [2022-11-18 20:29:09,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:09,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:09,509 INFO L87 Difference]: Start difference. First operand 299 states and 551 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) [2022-11-18 20:29:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:09,601 INFO L93 Difference]: Finished difference Result 292 states and 543 transitions. [2022-11-18 20:29:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:09,602 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 [2022-11-18 20:29:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:09,605 INFO L225 Difference]: With dead ends: 292 [2022-11-18 20:29:09,605 INFO L226 Difference]: Without dead ends: 292 [2022-11-18 20:29:09,606 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 [2022-11-18 20:29:09,607 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:09,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-18 20:29:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-11-18 20:29:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 229 states have (on average 2.37117903930131) internal successors, (543), 291 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 543 transitions. [2022-11-18 20:29:09,628 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 543 transitions. Word has length 2 [2022-11-18 20:29:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:09,628 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 543 transitions. [2022-11-18 20:29:09,629 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) [2022-11-18 20:29:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 543 transitions. [2022-11-18 20:29:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:29:09,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:09,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:29:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:29:09,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-18 20:29:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:09,632 INFO L85 PathProgramCache]: Analyzing trace with hash 486545819, now seen corresponding path program 1 times [2022-11-18 20:29:09,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427233822] [2022-11-18 20:29:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:09,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:09,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427233822] [2022-11-18 20:29:09,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427233822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714049074] [2022-11-18 20:29:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:09,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:09,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:09,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:29:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:29:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:10,082 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 [2022-11-18 20:29:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:10,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:10,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714049074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:10,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:10,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-18 20:29:10,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518503203] [2022-11-18 20:29:10,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:29:10,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:29:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:29:10,294 INFO L87 Difference]: Start difference. First operand 292 states and 543 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) [2022-11-18 20:29:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:10,459 INFO L93 Difference]: Finished difference Result 75 states and 125 transitions. [2022-11-18 20:29:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:29:10,460 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 [2022-11-18 20:29:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:10,461 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:29:10,461 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 20:29:10,462 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 [2022-11-18 20:29:10,463 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 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 [2022-11-18 20:29:10,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 20:29:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-18 20:29:10,468 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) [2022-11-18 20:29:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 125 transitions. [2022-11-18 20:29:10,469 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 125 transitions. Word has length 5 [2022-11-18 20:29:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:10,470 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 125 transitions. [2022-11-18 20:29:10,470 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) [2022-11-18 20:29:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 125 transitions. [2022-11-18 20:29:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:29:10,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:10,472 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-18 20:29:10,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:10,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:10,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-18 20:29:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2096948409, now seen corresponding path program 1 times [2022-11-18 20:29:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351287315] [2022-11-18 20:29:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:29:10,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:29:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:29:10,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:29:10,784 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:29:10,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-11-18 20:29:10,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-11-18 20:29:10,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-11-18 20:29:10,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-11-18 20:29:10,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-11-18 20:29:10,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-11-18 20:29:10,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-11-18 20:29:10,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-11-18 20:29:10,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-11-18 20:29:10,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-11-18 20:29:10,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-11-18 20:29:10,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-11-18 20:29:10,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-11-18 20:29:10,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-11-18 20:29:10,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-11-18 20:29:10,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-11-18 20:29:10,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-11-18 20:29:10,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-11-18 20:29:10,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-11-18 20:29:10,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-11-18 20:29:10,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-11-18 20:29:10,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-11-18 20:29:10,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-11-18 20:29:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-11-18 20:29:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-11-18 20:29:10,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:29:10,803 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 20:29:10,807 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:29:10,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:29:10,856 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:29:10,867 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:29:10,868 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 174 transitions, 366 flow [2022-11-18 20:29:10,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 174 transitions, 366 flow [2022-11-18 20:29:10,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 174 transitions, 366 flow [2022-11-18 20:29:10,973 INFO L130 PetriNetUnfolder]: 31/292 cut-off events. [2022-11-18 20:29:10,974 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 20:29:10,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 292 events. 31/292 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1056 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2022-11-18 20:29:10,991 INFO L119 LiptonReduction]: Number of co-enabled transitions 12080 [2022-11-18 20:29:17,865 INFO L134 LiptonReduction]: Checked pairs total: 31115 [2022-11-18 20:29:17,865 INFO L136 LiptonReduction]: Total number of compositions: 164 [2022-11-18 20:29:17,866 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 77 transitions, 172 flow [2022-11-18 20:29:18,199 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8178 states, 7162 states have (on average 3.9572745043284) internal successors, (28342), 8177 states have internal predecessors, (28342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:18,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:29:18,203 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;@3c19280, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:29:18,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-18 20:29:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 8178 states, 7162 states have (on average 3.9572745043284) internal successors, (28342), 8177 states have internal predecessors, (28342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:29:18,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:18,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:29:18,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-18 20:29:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 28452, now seen corresponding path program 1 times [2022-11-18 20:29:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:18,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912386379] [2022-11-18 20:29:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:18,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:18,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:18,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912386379] [2022-11-18 20:29:18,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912386379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:18,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:18,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:29:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007182218] [2022-11-18 20:29:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:18,348 INFO L87 Difference]: Start difference. First operand has 8178 states, 7162 states have (on average 3.9572745043284) internal successors, (28342), 8177 states have internal predecessors, (28342), 0 states have call successors, (0), 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) [2022-11-18 20:29:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:18,569 INFO L93 Difference]: Finished difference Result 5974 states and 16499 transitions. [2022-11-18 20:29:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:18,570 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 [2022-11-18 20:29:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:18,616 INFO L225 Difference]: With dead ends: 5974 [2022-11-18 20:29:18,616 INFO L226 Difference]: Without dead ends: 5958 [2022-11-18 20:29:18,616 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 [2022-11-18 20:29:18,618 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:18,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 11 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2022-11-18 20:29:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5958. [2022-11-18 20:29:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5958 states, 5445 states have (on average 3.02277318640955) internal successors, (16459), 5957 states have internal predecessors, (16459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5958 states to 5958 states and 16459 transitions. [2022-11-18 20:29:18,957 INFO L78 Accepts]: Start accepts. Automaton has 5958 states and 16459 transitions. Word has length 2 [2022-11-18 20:29:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:18,959 INFO L495 AbstractCegarLoop]: Abstraction has 5958 states and 16459 transitions. [2022-11-18 20:29:18,959 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) [2022-11-18 20:29:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5958 states and 16459 transitions. [2022-11-18 20:29:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:29:18,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:18,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:29:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:29:18,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-18 20:29:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 28453, now seen corresponding path program 1 times [2022-11-18 20:29:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367707513] [2022-11-18 20:29:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:18,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:19,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367707513] [2022-11-18 20:29:19,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367707513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:19,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:19,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:29:19,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667266451] [2022-11-18 20:29:19,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:19,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:19,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:19,031 INFO L87 Difference]: Start difference. First operand 5958 states and 16459 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) [2022-11-18 20:29:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:19,232 INFO L93 Difference]: Finished difference Result 5951 states and 16451 transitions. [2022-11-18 20:29:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:19,233 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 [2022-11-18 20:29:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:19,275 INFO L225 Difference]: With dead ends: 5951 [2022-11-18 20:29:19,275 INFO L226 Difference]: Without dead ends: 5951 [2022-11-18 20:29:19,275 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 [2022-11-18 20:29:19,276 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:19,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-11-18 20:29:19,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5951. [2022-11-18 20:29:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5951 states, 5442 states have (on average 3.0229694965086367) internal successors, (16451), 5950 states have internal predecessors, (16451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5951 states to 5951 states and 16451 transitions. [2022-11-18 20:29:19,666 INFO L78 Accepts]: Start accepts. Automaton has 5951 states and 16451 transitions. Word has length 2 [2022-11-18 20:29:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:19,667 INFO L495 AbstractCegarLoop]: Abstraction has 5951 states and 16451 transitions. [2022-11-18 20:29:19,667 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) [2022-11-18 20:29:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5951 states and 16451 transitions. [2022-11-18 20:29:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:29:19,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:19,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:29:19,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:29:19,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-18 20:29:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 526564793, now seen corresponding path program 1 times [2022-11-18 20:29:19,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:19,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984678166] [2022-11-18 20:29:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:19,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:19,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984678166] [2022-11-18 20:29:19,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984678166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674677455] [2022-11-18 20:29:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:19,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:19,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:19,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:19,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:29:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:29:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:19,983 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 [2022-11-18 20:29:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:20,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:20,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674677455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:20,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:20,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-18 20:29:20,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997778830] [2022-11-18 20:29:20,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:20,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:29:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:20,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:29:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:29:20,126 INFO L87 Difference]: Start difference. First operand 5951 states and 16451 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) [2022-11-18 20:29:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:20,437 INFO L93 Difference]: Finished difference Result 1695 states and 4499 transitions. [2022-11-18 20:29:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:20,442 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 [2022-11-18 20:29:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:20,455 INFO L225 Difference]: With dead ends: 1695 [2022-11-18 20:29:20,455 INFO L226 Difference]: Without dead ends: 1695 [2022-11-18 20:29:20,456 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 [2022-11-18 20:29:20,456 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 290 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:20,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 43 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:29:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-18 20:29:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1695. [2022-11-18 20:29:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1646 states have (on average 2.733292831105711) internal successors, (4499), 1694 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 4499 transitions. [2022-11-18 20:29:20,647 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 4499 transitions. Word has length 6 [2022-11-18 20:29:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:20,647 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 4499 transitions. [2022-11-18 20:29:20,648 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) [2022-11-18 20:29:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 4499 transitions. [2022-11-18 20:29:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:29:20,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:20,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:29:20,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:20,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:29:20,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-18 20:29:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 526765460, now seen corresponding path program 1 times [2022-11-18 20:29:20,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:20,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028213658] [2022-11-18 20:29:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:21,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028213658] [2022-11-18 20:29:21,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028213658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:21,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:21,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:29:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965259481] [2022-11-18 20:29:21,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:21,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:21,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:21,032 INFO L87 Difference]: Start difference. First operand 1695 states and 4499 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) [2022-11-18 20:29:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:21,108 INFO L93 Difference]: Finished difference Result 1347 states and 3551 transitions. [2022-11-18 20:29:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:21,109 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 [2022-11-18 20:29:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:21,128 INFO L225 Difference]: With dead ends: 1347 [2022-11-18 20:29:21,128 INFO L226 Difference]: Without dead ends: 1347 [2022-11-18 20:29:21,129 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 [2022-11-18 20:29:21,130 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:21,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-11-18 20:29:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1347. [2022-11-18 20:29:21,170 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) [2022-11-18 20:29:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 3551 transitions. [2022-11-18 20:29:21,176 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 3551 transitions. Word has length 6 [2022-11-18 20:29:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:21,176 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 3551 transitions. [2022-11-18 20:29:21,176 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) [2022-11-18 20:29:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 3551 transitions. [2022-11-18 20:29:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:29:21,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:21,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:29:21,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-18 20:29:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -850141623, now seen corresponding path program 1 times [2022-11-18 20:29:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178928834] [2022-11-18 20:29:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:21,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:21,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178928834] [2022-11-18 20:29:21,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178928834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:21,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:21,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:29:21,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838947408] [2022-11-18 20:29:21,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:21,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:21,282 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) [2022-11-18 20:29:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:21,361 INFO L93 Difference]: Finished difference Result 771 states and 1991 transitions. [2022-11-18 20:29:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:21,361 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 [2022-11-18 20:29:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:21,379 INFO L225 Difference]: With dead ends: 771 [2022-11-18 20:29:21,379 INFO L226 Difference]: Without dead ends: 771 [2022-11-18 20:29:21,380 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 [2022-11-18 20:29:21,381 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 [2022-11-18 20:29:21,382 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] [2022-11-18 20:29:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-18 20:29:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-18 20:29:21,404 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) [2022-11-18 20:29:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1991 transitions. [2022-11-18 20:29:21,408 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1991 transitions. Word has length 7 [2022-11-18 20:29:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:21,408 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1991 transitions. [2022-11-18 20:29:21,408 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) [2022-11-18 20:29:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1991 transitions. [2022-11-18 20:29:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:29:21,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:21,411 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:29:21,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:29:21,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-18 20:29:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 292471115, now seen corresponding path program 1 times [2022-11-18 20:29:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:21,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894972117] [2022-11-18 20:29:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:21,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:29:21,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:29:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:29:21,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:29:21,464 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:29:21,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-11-18 20:29:21,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-11-18 20:29:21,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-11-18 20:29:21,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-11-18 20:29:21,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-11-18 20:29:21,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-11-18 20:29:21,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-11-18 20:29:21,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-11-18 20:29:21,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-11-18 20:29:21,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-11-18 20:29:21,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-11-18 20:29:21,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-11-18 20:29:21,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-11-18 20:29:21,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-11-18 20:29:21,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-11-18 20:29:21,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-11-18 20:29:21,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-11-18 20:29:21,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-11-18 20:29:21,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-11-18 20:29:21,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-11-18 20:29:21,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-11-18 20:29:21,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-11-18 20:29:21,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-11-18 20:29:21,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-11-18 20:29:21,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-11-18 20:29:21,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-11-18 20:29:21,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-11-18 20:29:21,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-11-18 20:29:21,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-11-18 20:29:21,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-11-18 20:29:21,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-11-18 20:29:21,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-11-18 20:29:21,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-11-18 20:29:21,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:29:21,476 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 20:29:21,477 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:29:21,477 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:29:21,523 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:29:21,526 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:29:21,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 216 transitions, 462 flow [2022-11-18 20:29:21,527 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 216 transitions, 462 flow [2022-11-18 20:29:21,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 216 transitions, 462 flow [2022-11-18 20:29:21,716 INFO L130 PetriNetUnfolder]: 50/451 cut-off events. [2022-11-18 20:29:21,716 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 20:29:21,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 451 events. 50/451 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1811 event pairs, 1 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2022-11-18 20:29:21,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 23280 [2022-11-18 20:29:29,374 INFO L134 LiptonReduction]: Checked pairs total: 65903 [2022-11-18 20:29:29,375 INFO L136 LiptonReduction]: Total number of compositions: 194 [2022-11-18 20:29:29,376 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 88 places, 104 transitions, 238 flow [2022-11-18 20:29:36,673 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 167138 states, 157581 states have (on average 4.971176728158851) internal successors, (783363), 167137 states have internal predecessors, (783363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:36,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:29:36,699 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;@3c19280, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:29:36,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-18 20:29:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 167138 states, 157581 states have (on average 4.971176728158851) internal successors, (783363), 167137 states have internal predecessors, (783363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:29:37,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:37,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:29:37,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:29:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash 42920, now seen corresponding path program 1 times [2022-11-18 20:29:37,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:37,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239887206] [2022-11-18 20:29:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:37,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239887206] [2022-11-18 20:29:37,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239887206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:37,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:37,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:29:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928174682] [2022-11-18 20:29:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:37,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:37,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:37,362 INFO L87 Difference]: Start difference. First operand has 167138 states, 157581 states have (on average 4.971176728158851) internal successors, (783363), 167137 states have internal predecessors, (783363), 0 states have call successors, (0), 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) [2022-11-18 20:29:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:40,373 INFO L93 Difference]: Finished difference Result 110104 states and 405707 transitions. [2022-11-18 20:29:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:40,374 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 [2022-11-18 20:29:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:42,404 INFO L225 Difference]: With dead ends: 110104 [2022-11-18 20:29:42,404 INFO L226 Difference]: Without dead ends: 110040 [2022-11-18 20:29:42,404 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 [2022-11-18 20:29:42,405 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:42,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 11 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:29:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110040 states. [2022-11-18 20:29:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110040 to 110040. [2022-11-18 20:29:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110040 states, 106227 states have (on average 3.8172875069426793) internal successors, (405499), 110039 states have internal predecessors, (405499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110040 states to 110040 states and 405499 transitions. [2022-11-18 20:29:49,846 INFO L78 Accepts]: Start accepts. Automaton has 110040 states and 405499 transitions. Word has length 2 [2022-11-18 20:29:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:49,846 INFO L495 AbstractCegarLoop]: Abstraction has 110040 states and 405499 transitions. [2022-11-18 20:29:49,848 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) [2022-11-18 20:29:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 110040 states and 405499 transitions. [2022-11-18 20:29:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:29:49,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:49,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:29:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:29:49,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:29:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 42922, now seen corresponding path program 1 times [2022-11-18 20:29:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:49,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794988176] [2022-11-18 20:29:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:49,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:49,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794988176] [2022-11-18 20:29:49,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794988176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:49,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:49,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:29:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182061042] [2022-11-18 20:29:49,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:49,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:49,953 INFO L87 Difference]: Start difference. First operand 110040 states and 405499 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) [2022-11-18 20:29:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:51,662 INFO L93 Difference]: Finished difference Result 110033 states and 405491 transitions. [2022-11-18 20:29:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:51,663 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 [2022-11-18 20:29:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:52,506 INFO L225 Difference]: With dead ends: 110033 [2022-11-18 20:29:52,507 INFO L226 Difference]: Without dead ends: 110033 [2022-11-18 20:29:52,507 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 [2022-11-18 20:29:52,507 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:52,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:29:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110033 states. [2022-11-18 20:29:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110033 to 110033. [2022-11-18 20:29:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110033 states, 106224 states have (on average 3.817320003012502) internal successors, (405491), 110032 states have internal predecessors, (405491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110033 states to 110033 states and 405491 transitions. [2022-11-18 20:29:58,934 INFO L78 Accepts]: Start accepts. Automaton has 110033 states and 405491 transitions. Word has length 2 [2022-11-18 20:29:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:58,935 INFO L495 AbstractCegarLoop]: Abstraction has 110033 states and 405491 transitions. [2022-11-18 20:29:58,935 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) [2022-11-18 20:29:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 110033 states and 405491 transitions. [2022-11-18 20:29:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:29:58,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:58,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:29:58,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:29:58,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:29:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1018175676, now seen corresponding path program 1 times [2022-11-18 20:29:58,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:58,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600521938] [2022-11-18 20:29:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:59,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600521938] [2022-11-18 20:29:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600521938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:59,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:29:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248223911] [2022-11-18 20:29:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:59,158 INFO L87 Difference]: Start difference. First operand 110033 states and 405491 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) [2022-11-18 20:30:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:00,016 INFO L93 Difference]: Finished difference Result 78281 states and 286043 transitions. [2022-11-18 20:30:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:30:00,016 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 [2022-11-18 20:30:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:00,466 INFO L225 Difference]: With dead ends: 78281 [2022-11-18 20:30:00,466 INFO L226 Difference]: Without dead ends: 78281 [2022-11-18 20:30:00,467 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 [2022-11-18 20:30:00,467 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:00,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 11 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:30:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78281 states. [2022-11-18 20:30:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78281 to 78281. [2022-11-18 20:30:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78281 states, 76772 states have (on average 3.7258766216849892) internal successors, (286043), 78280 states have internal predecessors, (286043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78281 states to 78281 states and 286043 transitions. [2022-11-18 20:30:04,810 INFO L78 Accepts]: Start accepts. Automaton has 78281 states and 286043 transitions. Word has length 6 [2022-11-18 20:30:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:04,810 INFO L495 AbstractCegarLoop]: Abstraction has 78281 states and 286043 transitions. [2022-11-18 20:30:04,810 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) [2022-11-18 20:30:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 78281 states and 286043 transitions. [2022-11-18 20:30:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:30:04,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:04,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:30:04,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:30:04,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:30:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1017903396, now seen corresponding path program 1 times [2022-11-18 20:30:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:04,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017192779] [2022-11-18 20:30:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:04,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017192779] [2022-11-18 20:30:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017192779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170900020] [2022-11-18 20:30:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:04,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:04,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:04,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:04,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:30:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:30:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:05,049 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 [2022-11-18 20:30:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:05,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:05,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170900020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:05,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:05,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-18 20:30:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837991206] [2022-11-18 20:30:05,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:05,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:30:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:30:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:30:05,158 INFO L87 Difference]: Start difference. First operand 78281 states and 286043 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:07,149 INFO L93 Difference]: Finished difference Result 74749 states and 272287 transitions. [2022-11-18 20:30:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:30:07,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-18 20:30:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:07,547 INFO L225 Difference]: With dead ends: 74749 [2022-11-18 20:30:07,548 INFO L226 Difference]: Without dead ends: 74749 [2022-11-18 20:30:07,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:30:07,549 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 326 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:07,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 75 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:30:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74749 states. [2022-11-18 20:30:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74749 to 73817. [2022-11-18 20:30:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73817 states, 72478 states have (on average 3.7177902259996136) internal successors, (269458), 73816 states have internal predecessors, (269458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73817 states to 73817 states and 269458 transitions. [2022-11-18 20:30:11,659 INFO L78 Accepts]: Start accepts. Automaton has 73817 states and 269458 transitions. Word has length 6 [2022-11-18 20:30:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:11,660 INFO L495 AbstractCegarLoop]: Abstraction has 73817 states and 269458 transitions. [2022-11-18 20:30:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 73817 states and 269458 transitions. [2022-11-18 20:30:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:30:11,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:11,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:11,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:11,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:30:11,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:30:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1498673800, now seen corresponding path program 1 times [2022-11-18 20:30:11,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500820835] [2022-11-18 20:30:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:11,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:11,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:11,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500820835] [2022-11-18 20:30:11,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500820835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:11,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:11,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:30:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706922616] [2022-11-18 20:30:11,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:11,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:30:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:30:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:30:11,962 INFO L87 Difference]: Start difference. First operand 73817 states and 269458 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) [2022-11-18 20:30:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:12,585 INFO L93 Difference]: Finished difference Result 46094 states and 147000 transitions. [2022-11-18 20:30:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:30:12,585 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 [2022-11-18 20:30:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:12,788 INFO L225 Difference]: With dead ends: 46094 [2022-11-18 20:30:12,788 INFO L226 Difference]: Without dead ends: 44085 [2022-11-18 20:30:12,789 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 [2022-11-18 20:30:12,789 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:12,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 24 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:30:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44085 states. [2022-11-18 20:30:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44085 to 43374. [2022-11-18 20:30:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43374 states, 42935 states have (on average 3.2424595318504714) internal successors, (139215), 43373 states have internal predecessors, (139215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43374 states to 43374 states and 139215 transitions. [2022-11-18 20:30:15,357 INFO L78 Accepts]: Start accepts. Automaton has 43374 states and 139215 transitions. Word has length 7 [2022-11-18 20:30:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:15,357 INFO L495 AbstractCegarLoop]: Abstraction has 43374 states and 139215 transitions. [2022-11-18 20:30:15,357 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) [2022-11-18 20:30:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 43374 states and 139215 transitions. [2022-11-18 20:30:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:30:15,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:15,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-18 20:30:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:30:15,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:30:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1473236103, now seen corresponding path program 1 times [2022-11-18 20:30:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473486516] [2022-11-18 20:30:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:15,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473486516] [2022-11-18 20:30:15,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473486516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854183220] [2022-11-18 20:30:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:15,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:15,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:15,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:15,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:30:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:30:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:15,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:15,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854183220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:15,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:15,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-18 20:30:15,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565565901] [2022-11-18 20:30:15,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:15,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:30:15,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:30:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:30:15,634 INFO L87 Difference]: Start difference. First operand 43374 states and 139215 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:15,880 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-18 20:30:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:30:15,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 11 [2022-11-18 20:30:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:15,919 INFO L225 Difference]: With dead ends: 9267 [2022-11-18 20:30:15,919 INFO L226 Difference]: Without dead ends: 9267 [2022-11-18 20:30:15,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:30:15,920 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 212 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:15,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 38 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:30:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-18 20:30:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-18 20:30:16,197 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) [2022-11-18 20:30:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-18 20:30:16,242 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 11 [2022-11-18 20:30:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:16,242 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-18 20:30:16,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-18 20:30:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:30:16,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:16,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-18 20:30:16,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:16,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396b6668-363f-4bce-a1b2-5a577ca60e79/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:30:16,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-18 20:30:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1738674213, now seen corresponding path program 1 times [2022-11-18 20:30:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:16,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591591778] [2022-11-18 20:30:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:16,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:30:16,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:30:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:30:16,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:30:16,526 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:30:16,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2022-11-18 20:30:16,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2022-11-18 20:30:16,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2022-11-18 20:30:16,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2022-11-18 20:30:16,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2022-11-18 20:30:16,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2022-11-18 20:30:16,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2022-11-18 20:30:16,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2022-11-18 20:30:16,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2022-11-18 20:30:16,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2022-11-18 20:30:16,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2022-11-18 20:30:16,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2022-11-18 20:30:16,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2022-11-18 20:30:16,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2022-11-18 20:30:16,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2022-11-18 20:30:16,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2022-11-18 20:30:16,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2022-11-18 20:30:16,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2022-11-18 20:30:16,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2022-11-18 20:30:16,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2022-11-18 20:30:16,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2022-11-18 20:30:16,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2022-11-18 20:30:16,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2022-11-18 20:30:16,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2022-11-18 20:30:16,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2022-11-18 20:30:16,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2022-11-18 20:30:16,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2022-11-18 20:30:16,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2022-11-18 20:30:16,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2022-11-18 20:30:16,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2022-11-18 20:30:16,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2022-11-18 20:30:16,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2022-11-18 20:30:16,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2022-11-18 20:30:16,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2022-11-18 20:30:16,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2022-11-18 20:30:16,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2022-11-18 20:30:16,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2022-11-18 20:30:16,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2022-11-18 20:30:16,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2022-11-18 20:30:16,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2022-11-18 20:30:16,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2022-11-18 20:30:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:30:16,541 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:16,542 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:30:16,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 20:30:16,590 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 20:30:16,595 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:30:16,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 258 transitions, 560 flow [2022-11-18 20:30:16,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 258 transitions, 560 flow [2022-11-18 20:30:16,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 258 transitions, 560 flow [2022-11-18 20:30:16,796 INFO L130 PetriNetUnfolder]: 81/698 cut-off events. [2022-11-18 20:30:16,796 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 20:30:16,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 698 events. 81/698 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3106 event pairs, 6 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 471. Up to 32 conditions per place. [2022-11-18 20:30:16,841 INFO L119 LiptonReduction]: Number of co-enabled transitions 37920 [2022-11-18 20:30:25,511 INFO L134 LiptonReduction]: Checked pairs total: 115864 [2022-11-18 20:30:25,511 INFO L136 LiptonReduction]: Total number of compositions: 236 [2022-11-18 20:30:25,512 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 110 places, 131 transitions, 306 flow