./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a --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 b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --- 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-b5237d8 [2022-11-21 16:27:02,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:27:02,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:27:02,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:27:02,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:27:02,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:27:02,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:27:02,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:27:02,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:27:02,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:27:02,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:27:02,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:27:02,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:27:02,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:27:02,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:27:02,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:27:02,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:27:02,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:27:02,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:27:02,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:27:02,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:27:02,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:27:02,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:27:02,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:27:02,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:27:02,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:27:02,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:27:02,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:27:02,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:27:02,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:27:02,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:27:02,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:27:02,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:27:02,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:27:02,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:27:02,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:27:02,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:27:02,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:27:02,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:27:02,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:27:02,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:27:02,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:27:02,512 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:27:02,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:27:02,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:27:02,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:27:02,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:27:02,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:27:02,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:27:02,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:27:02,515 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:27:02,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:27:02,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:27:02,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:27:02,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:27:02,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:27:02,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:27:02,518 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:27:02,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:27:02,518 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:27:02,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:27:02,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:27:02,519 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:27:02,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:27:02,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:27:02,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:27:02,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:27:02,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:27:02,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:27:02,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:27:02,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:27:02,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:27:02,522 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_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 [2022-11-21 16:27:02,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:27:02,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:27:02,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:27:02,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:27:02,844 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:27:02,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-11-21 16:27:05,948 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:27:06,155 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:27:06,156 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-11-21 16:27:06,163 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/data/bae007d9a/64564ee1ba1044ad931ef0e840ad2c1c/FLAG2220d2ab4 [2022-11-21 16:27:06,176 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/data/bae007d9a/64564ee1ba1044ad931ef0e840ad2c1c [2022-11-21 16:27:06,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:27:06,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:27:06,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:27:06,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:27:06,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:27:06,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66de171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06, skipping insertion in model container [2022-11-21 16:27:06,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:27:06,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:27:06,401 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-11-21 16:27:06,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:27:06,416 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:27:06,438 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-11-21 16:27:06,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:27:06,454 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:27:06,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06 WrapperNode [2022-11-21 16:27:06,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:27:06,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:27:06,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:27:06,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:27:06,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,492 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-21 16:27:06,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:27:06,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:27:06,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:27:06,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:27:06,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:27:06,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:27:06,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:27:06,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:27:06,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (1/1) ... [2022-11-21 16:27:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:27:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:06,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:27:06,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:27:06,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:27:06,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:27:06,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:27:06,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:27:06,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:27:06,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:27:06,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:27:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:27:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:27:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:27:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:27:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:27:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:27:06,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:27:06,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:27:06,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:27:06,612 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:27:06,710 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:27:06,712 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:27:07,015 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:27:07,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:27:07,042 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:27:07,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:27:07 BoogieIcfgContainer [2022-11-21 16:27:07,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:27:07,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:27:07,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:27:07,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:27:07,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:27:06" (1/3) ... [2022-11-21 16:27:07,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbe741a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:27:07, skipping insertion in model container [2022-11-21 16:27:07,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:27:06" (2/3) ... [2022-11-21 16:27:07,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbe741a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:27:07, skipping insertion in model container [2022-11-21 16:27:07,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:27:07" (3/3) ... [2022-11-21 16:27:07,053 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-11-21 16:27:07,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:27:07,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-21 16:27:07,072 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:27:07,191 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:27:07,229 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:27:07,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 314 flow [2022-11-21 16:27:07,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 314 flow [2022-11-21 16:27:07,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 314 flow [2022-11-21 16:27:07,333 INFO L130 PetriNetUnfolder]: 16/142 cut-off events. [2022-11-21 16:27:07,334 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:27:07,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 16/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 88. Up to 4 conditions per place. [2022-11-21 16:27:07,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 3570 [2022-11-21 16:27:13,757 INFO L134 LiptonReduction]: Checked pairs total: 3247 [2022-11-21 16:27:13,758 INFO L136 LiptonReduction]: Total number of compositions: 144 [2022-11-21 16:27:13,774 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 36 transitions, 96 flow [2022-11-21 16:27:13,797 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 73 states have (on average 3.493150684931507) internal successors, (255), 86 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:13,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:27:13,821 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;@634e3eaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:27:13,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-21 16:27:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 73 states have (on average 3.493150684931507) internal successors, (255), 86 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-21 16:27:13,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:13,830 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-21 16:27:13,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 588, now seen corresponding path program 1 times [2022-11-21 16:27:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:13,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526762580] [2022-11-21 16:27:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:13,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526762580] [2022-11-21 16:27:13,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526762580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:13,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:13,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-21 16:27:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463894731] [2022-11-21 16:27:13,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:13,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:27:13,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:27:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:27:13,977 INFO L87 Difference]: Start difference. First operand has 87 states, 73 states have (on average 3.493150684931507) internal successors, (255), 86 states have internal predecessors, (255), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:14,055 INFO L93 Difference]: Finished difference Result 84 states and 252 transitions. [2022-11-21 16:27:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:27:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-21 16:27:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:14,070 INFO L225 Difference]: With dead ends: 84 [2022-11-21 16:27:14,070 INFO L226 Difference]: Without dead ends: 84 [2022-11-21 16:27:14,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:27:14,078 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:14,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:27:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-21 16:27:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-21 16:27:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 3.452054794520548) internal successors, (252), 83 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 252 transitions. [2022-11-21 16:27:14,135 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 252 transitions. Word has length 1 [2022-11-21 16:27:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:14,136 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 252 transitions. [2022-11-21 16:27:14,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 252 transitions. [2022-11-21 16:27:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:27:14,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:14,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:27:14,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:27:14,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:14,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash 580225, now seen corresponding path program 1 times [2022-11-21 16:27:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:14,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638686854] [2022-11-21 16:27:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:14,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:14,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:14,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638686854] [2022-11-21 16:27:14,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638686854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:14,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:14,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:27:14,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734439513] [2022-11-21 16:27:14,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:14,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:14,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:14,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:14,405 INFO L87 Difference]: Start difference. First operand 84 states and 252 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:14,450 INFO L93 Difference]: Finished difference Result 78 states and 236 transitions. [2022-11-21 16:27:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-21 16:27:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:14,452 INFO L225 Difference]: With dead ends: 78 [2022-11-21 16:27:14,452 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 16:27:14,452 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 [2022-11-21 16:27:14,453 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:14,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 16:27:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-21 16:27:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 3.420289855072464) internal successors, (236), 77 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 236 transitions. [2022-11-21 16:27:14,462 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 236 transitions. Word has length 3 [2022-11-21 16:27:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:14,463 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 236 transitions. [2022-11-21 16:27:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 236 transitions. [2022-11-21 16:27:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:27:14,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:14,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:27:14,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:27:14,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash 580227, now seen corresponding path program 1 times [2022-11-21 16:27:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:14,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952316836] [2022-11-21 16:27:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:14,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:14,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:14,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952316836] [2022-11-21 16:27:14,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952316836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:14,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:14,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:27:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528663064] [2022-11-21 16:27:14,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:14,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:14,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:14,622 INFO L87 Difference]: Start difference. First operand 78 states and 236 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:14,677 INFO L93 Difference]: Finished difference Result 72 states and 220 transitions. [2022-11-21 16:27:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-21 16:27:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:14,683 INFO L225 Difference]: With dead ends: 72 [2022-11-21 16:27:14,683 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 16:27:14,684 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 [2022-11-21 16:27:14,688 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:14,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 16:27:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-21 16:27:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 71 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 220 transitions. [2022-11-21 16:27:14,700 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 220 transitions. Word has length 3 [2022-11-21 16:27:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:14,700 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 220 transitions. [2022-11-21 16:27:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 220 transitions. [2022-11-21 16:27:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:27:14,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:14,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:27:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:27:14,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash 557610552, now seen corresponding path program 1 times [2022-11-21 16:27:14,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:14,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465361910] [2022-11-21 16:27:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:14,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:14,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465361910] [2022-11-21 16:27:14,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465361910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:14,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:14,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:27:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504099191] [2022-11-21 16:27:14,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:14,771 INFO L87 Difference]: Start difference. First operand 72 states and 220 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:14,820 INFO L93 Difference]: Finished difference Result 66 states and 204 transitions. [2022-11-21 16:27:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 [2022-11-21 16:27:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:14,821 INFO L225 Difference]: With dead ends: 66 [2022-11-21 16:27:14,821 INFO L226 Difference]: Without dead ends: 66 [2022-11-21 16:27:14,822 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 [2022-11-21 16:27:14,823 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:14,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-21 16:27:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-21 16:27:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 204 transitions. [2022-11-21 16:27:14,829 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 204 transitions. Word has length 5 [2022-11-21 16:27:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:14,829 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 204 transitions. [2022-11-21 16:27:14,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 204 transitions. [2022-11-21 16:27:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:27:14,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:14,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:27:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:27:14,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 557610553, now seen corresponding path program 1 times [2022-11-21 16:27:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128267019] [2022-11-21 16:27:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:14,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:14,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128267019] [2022-11-21 16:27:14,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128267019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:14,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:14,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:27:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989902367] [2022-11-21 16:27:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:14,960 INFO L87 Difference]: Start difference. First operand 66 states and 204 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:15,001 INFO L93 Difference]: Finished difference Result 60 states and 188 transitions. [2022-11-21 16:27:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:15,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 [2022-11-21 16:27:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:15,008 INFO L225 Difference]: With dead ends: 60 [2022-11-21 16:27:15,009 INFO L226 Difference]: Without dead ends: 60 [2022-11-21 16:27:15,009 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 [2022-11-21 16:27:15,010 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:15,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-21 16:27:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-21 16:27:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 59 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 188 transitions. [2022-11-21 16:27:15,021 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 188 transitions. Word has length 5 [2022-11-21 16:27:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:15,021 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 188 transitions. [2022-11-21 16:27:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 188 transitions. [2022-11-21 16:27:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:27:15,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:15,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:15,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:27:15,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1007159207, now seen corresponding path program 1 times [2022-11-21 16:27:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:15,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483446050] [2022-11-21 16:27:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:15,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483446050] [2022-11-21 16:27:15,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483446050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:15,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:15,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:27:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267379162] [2022-11-21 16:27:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:15,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:27:15,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:27:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:27:15,196 INFO L87 Difference]: Start difference. First operand 60 states and 188 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-21 16:27:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:15,248 INFO L93 Difference]: Finished difference Result 52 states and 156 transitions. [2022-11-21 16:27:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-21 16:27:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:15,250 INFO L225 Difference]: With dead ends: 52 [2022-11-21 16:27:15,251 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 16:27:15,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:27:15,253 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:15,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 16:27:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-21 16:27:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 3.12) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 156 transitions. [2022-11-21 16:27:15,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 156 transitions. Word has length 7 [2022-11-21 16:27:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:15,261 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 156 transitions. [2022-11-21 16:27:15,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-21 16:27:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 156 transitions. [2022-11-21 16:27:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:27:15,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:15,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:15,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:27:15,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1007159206, now seen corresponding path program 1 times [2022-11-21 16:27:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:15,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104454464] [2022-11-21 16:27:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:15,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104454464] [2022-11-21 16:27:15,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104454464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:15,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:15,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:27:15,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972184426] [2022-11-21 16:27:15,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,301 INFO L87 Difference]: Start difference. First operand 52 states and 156 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-21 16:27:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:15,330 INFO L93 Difference]: Finished difference Result 44 states and 124 transitions. [2022-11-21 16:27:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-21 16:27:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:15,332 INFO L225 Difference]: With dead ends: 44 [2022-11-21 16:27:15,332 INFO L226 Difference]: Without dead ends: 44 [2022-11-21 16:27:15,332 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 [2022-11-21 16:27:15,333 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:15,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-21 16:27:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-21 16:27:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 124 transitions. [2022-11-21 16:27:15,337 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 124 transitions. Word has length 7 [2022-11-21 16:27:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:15,338 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 124 transitions. [2022-11-21 16:27:15,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-21 16:27:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 124 transitions. [2022-11-21 16:27:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:27:15,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:15,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:15,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:27:15,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1635040621, now seen corresponding path program 1 times [2022-11-21 16:27:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408920326] [2022-11-21 16:27:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:15,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:15,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408920326] [2022-11-21 16:27:15,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408920326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:15,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:15,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:27:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058299168] [2022-11-21 16:27:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:15,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,423 INFO L87 Difference]: Start difference. First operand 44 states and 124 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:15,477 INFO L93 Difference]: Finished difference Result 58 states and 168 transitions. [2022-11-21 16:27:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-21 16:27:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:15,478 INFO L225 Difference]: With dead ends: 58 [2022-11-21 16:27:15,479 INFO L226 Difference]: Without dead ends: 58 [2022-11-21 16:27:15,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,485 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:15,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-21 16:27:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-21 16:27:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 168 transitions. [2022-11-21 16:27:15,506 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 168 transitions. Word has length 16 [2022-11-21 16:27:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:15,506 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 168 transitions. [2022-11-21 16:27:15,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 168 transitions. [2022-11-21 16:27:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 16:27:15,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:15,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:27:15,509 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1994697893, now seen corresponding path program 1 times [2022-11-21 16:27:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420411273] [2022-11-21 16:27:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:27:15,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:15,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420411273] [2022-11-21 16:27:15,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420411273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:15,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:15,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:27:15,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141340354] [2022-11-21 16:27:15,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:15,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:15,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,605 INFO L87 Difference]: Start difference. First operand 58 states and 168 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:15,651 INFO L93 Difference]: Finished difference Result 80 states and 240 transitions. [2022-11-21 16:27:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-21 16:27:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:15,654 INFO L225 Difference]: With dead ends: 80 [2022-11-21 16:27:15,654 INFO L226 Difference]: Without dead ends: 80 [2022-11-21 16:27:15,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,656 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:15,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-21 16:27:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-21 16:27:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 3.037974683544304) internal successors, (240), 79 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 240 transitions. [2022-11-21 16:27:15,662 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 240 transitions. Word has length 17 [2022-11-21 16:27:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:15,662 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 240 transitions. [2022-11-21 16:27:15,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 240 transitions. [2022-11-21 16:27:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:27:15,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:15,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:15,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:27:15,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1444999622, now seen corresponding path program 1 times [2022-11-21 16:27:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:15,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253881720] [2022-11-21 16:27:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:27:15,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:15,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253881720] [2022-11-21 16:27:15,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253881720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:15,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:15,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:27:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844172423] [2022-11-21 16:27:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:15,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:27:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:27:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,733 INFO L87 Difference]: Start difference. First operand 80 states and 240 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 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) [2022-11-21 16:27:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:15,781 INFO L93 Difference]: Finished difference Result 106 states and 325 transitions. [2022-11-21 16:27:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:27:15,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 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 18 [2022-11-21 16:27:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:15,782 INFO L225 Difference]: With dead ends: 106 [2022-11-21 16:27:15,783 INFO L226 Difference]: Without dead ends: 106 [2022-11-21 16:27:15,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:27:15,783 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:15,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:27:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-21 16:27:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-21 16:27:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 325 transitions. [2022-11-21 16:27:15,789 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 325 transitions. Word has length 18 [2022-11-21 16:27:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:15,790 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 325 transitions. [2022-11-21 16:27:15,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 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) [2022-11-21 16:27:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 325 transitions. [2022-11-21 16:27:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:27:15,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:15,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:27:15,792 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash -10207389, now seen corresponding path program 1 times [2022-11-21 16:27:15,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033356704] [2022-11-21 16:27:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:27:16,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:16,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033356704] [2022-11-21 16:27:16,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033356704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:27:16,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187278526] [2022-11-21 16:27:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:16,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:27:16,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:27:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:27:16,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:16,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:27:17,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187278526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:17,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:27:17,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 4] total 10 [2022-11-21 16:27:17,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402957441] [2022-11-21 16:27:17,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:27:17,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:27:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:27:17,099 INFO L87 Difference]: Start difference. First operand 106 states and 325 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:17,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:17,395 INFO L93 Difference]: Finished difference Result 198 states and 624 transitions. [2022-11-21 16:27:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:27:17,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 19 [2022-11-21 16:27:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:17,397 INFO L225 Difference]: With dead ends: 198 [2022-11-21 16:27:17,397 INFO L226 Difference]: Without dead ends: 198 [2022-11-21 16:27:17,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:27:17,398 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 214 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:17,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:27:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-21 16:27:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 170. [2022-11-21 16:27:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.171597633136095) internal successors, (536), 169 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 536 transitions. [2022-11-21 16:27:17,407 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 536 transitions. Word has length 19 [2022-11-21 16:27:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:17,408 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 536 transitions. [2022-11-21 16:27:17,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 536 transitions. [2022-11-21 16:27:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:27:17,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:17,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:17,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:27:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:17,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:17,618 INFO L85 PathProgramCache]: Analyzing trace with hash -135389758, now seen corresponding path program 2 times [2022-11-21 16:27:17,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:17,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680268280] [2022-11-21 16:27:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:17,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:27:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680268280] [2022-11-21 16:27:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680268280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:27:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460145619] [2022-11-21 16:27:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:27:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:18,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:27:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:27:18,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:27:18,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:18,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:27:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:27:18,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:27:18,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460145619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:18,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:27:18,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2022-11-21 16:27:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939040825] [2022-11-21 16:27:18,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:18,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:27:18,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:27:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:27:18,554 INFO L87 Difference]: Start difference. First operand 170 states and 536 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:18,723 INFO L93 Difference]: Finished difference Result 248 states and 790 transitions. [2022-11-21 16:27:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:27:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 21 [2022-11-21 16:27:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:18,726 INFO L225 Difference]: With dead ends: 248 [2022-11-21 16:27:18,726 INFO L226 Difference]: Without dead ends: 248 [2022-11-21 16:27:18,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:27:18,727 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:18,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:27:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-21 16:27:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2022-11-21 16:27:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.203791469194313) internal successors, (676), 211 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 676 transitions. [2022-11-21 16:27:18,736 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 676 transitions. Word has length 21 [2022-11-21 16:27:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:18,736 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 676 transitions. [2022-11-21 16:27:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 676 transitions. [2022-11-21 16:27:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:27:18,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:18,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:18,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:27:18,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:18,945 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1643534137, now seen corresponding path program 3 times [2022-11-21 16:27:18,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:18,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136020052] [2022-11-21 16:27:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:18,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:20,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136020052] [2022-11-21 16:27:20,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136020052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:27:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719629349] [2022-11-21 16:27:20,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:27:20,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:20,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:27:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:27:20,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 16:27:20,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:27:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:21,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:22,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719629349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:22,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:27:22,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-11-21 16:27:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446153382] [2022-11-21 16:27:22,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:22,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:27:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:27:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:27:22,435 INFO L87 Difference]: Start difference. First operand 212 states and 676 transitions. Second operand has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:29,094 INFO L93 Difference]: Finished difference Result 1861 states and 6156 transitions. [2022-11-21 16:27:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:27:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:27:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:29,106 INFO L225 Difference]: With dead ends: 1861 [2022-11-21 16:27:29,106 INFO L226 Difference]: Without dead ends: 1775 [2022-11-21 16:27:29,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1810, Invalid=6022, Unknown=0, NotChecked=0, Total=7832 [2022-11-21 16:27:29,109 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 813 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:29,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 0 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 16:27:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-11-21 16:27:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 846. [2022-11-21 16:27:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.9254437869822487) internal successors, (3317), 845 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3317 transitions. [2022-11-21 16:27:29,155 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3317 transitions. Word has length 22 [2022-11-21 16:27:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:29,155 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 3317 transitions. [2022-11-21 16:27:29,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3317 transitions. [2022-11-21 16:27:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:27:29,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:29,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:29,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:27:29,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:27:29,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1845016697, now seen corresponding path program 4 times [2022-11-21 16:27:29,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:29,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989259225] [2022-11-21 16:27:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:29,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:30,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989259225] [2022-11-21 16:27:30,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989259225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:27:30,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004245246] [2022-11-21 16:27:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:27:30,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:30,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:27:30,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:27:30,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:27:30,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:27:30,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:31,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:32,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004245246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:32,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:27:32,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-11-21 16:27:32,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504701912] [2022-11-21 16:27:32,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:32,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:27:32,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:27:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:27:32,524 INFO L87 Difference]: Start difference. First operand 846 states and 3317 transitions. Second operand has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:40,002 INFO L93 Difference]: Finished difference Result 3877 states and 13948 transitions. [2022-11-21 16:27:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-21 16:27:40,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:27:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:40,026 INFO L225 Difference]: With dead ends: 3877 [2022-11-21 16:27:40,027 INFO L226 Difference]: Without dead ends: 3711 [2022-11-21 16:27:40,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1548, Invalid=6824, Unknown=0, NotChecked=0, Total=8372 [2022-11-21 16:27:40,029 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 612 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:40,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 0 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 16:27:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2022-11-21 16:27:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 1336. [2022-11-21 16:27:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 4.115355805243445) internal successors, (5494), 1335 states have internal predecessors, (5494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 5494 transitions. [2022-11-21 16:27:40,122 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 5494 transitions. Word has length 22 [2022-11-21 16:27:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 5494 transitions. [2022-11-21 16:27:40,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 5494 transitions. [2022-11-21 16:27:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:27:40,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:40,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:40,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:27:40,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:27:40,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1347057775, now seen corresponding path program 5 times [2022-11-21 16:27:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773511966] [2022-11-21 16:27:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:41,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:41,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773511966] [2022-11-21 16:27:41,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773511966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:27:41,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240676605] [2022-11-21 16:27:41,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:27:41,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:41,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:41,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:27:41,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:27:41,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:27:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:27:41,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:43,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240676605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:43,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:27:43,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-21 16:27:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123828409] [2022-11-21 16:27:43,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:27:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:27:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:27:43,273 INFO L87 Difference]: Start difference. First operand 1336 states and 5494 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:53,589 INFO L93 Difference]: Finished difference Result 6526 states and 25548 transitions. [2022-11-21 16:27:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-21 16:27:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 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 22 [2022-11-21 16:27:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:53,636 INFO L225 Difference]: With dead ends: 6526 [2022-11-21 16:27:53,637 INFO L226 Difference]: Without dead ends: 6456 [2022-11-21 16:27:53,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4481 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2748, Invalid=9684, Unknown=0, NotChecked=0, Total=12432 [2022-11-21 16:27:53,640 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 723 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:53,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 0 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 16:27:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2022-11-21 16:27:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3496. [2022-11-21 16:27:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3495 states have (on average 4.41516452074392) internal successors, (15431), 3495 states have internal predecessors, (15431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 15431 transitions. [2022-11-21 16:27:53,866 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 15431 transitions. Word has length 22 [2022-11-21 16:27:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:53,866 INFO L495 AbstractCegarLoop]: Abstraction has 3496 states and 15431 transitions. [2022-11-21 16:27:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 15431 transitions. [2022-11-21 16:27:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:27:53,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:53,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:53,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:27:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:27:54,092 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash 478948637, now seen corresponding path program 6 times [2022-11-21 16:27:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:54,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019988976] [2022-11-21 16:27:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:55,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019988976] [2022-11-21 16:27:55,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019988976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:27:55,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144300587] [2022-11-21 16:27:55,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:27:55,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:27:55,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:27:55,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:27:55,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:27:55,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 16:27:55,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:27:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:55,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:27:56,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144300587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:56,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:27:56,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2022-11-21 16:27:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627159711] [2022-11-21 16:27:56,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:56,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:27:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:27:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:27:56,708 INFO L87 Difference]: Start difference. First operand 3496 states and 15431 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:59,011 INFO L93 Difference]: Finished difference Result 3995 states and 17115 transitions. [2022-11-21 16:27:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 16:27:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 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 22 [2022-11-21 16:27:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:59,034 INFO L225 Difference]: With dead ends: 3995 [2022-11-21 16:27:59,034 INFO L226 Difference]: Without dead ends: 3958 [2022-11-21 16:27:59,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:27:59,036 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 238 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:59,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 0 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:27:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2022-11-21 16:27:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3672. [2022-11-21 16:27:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 4.409425224734405) internal successors, (16187), 3671 states have internal predecessors, (16187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 16187 transitions. [2022-11-21 16:27:59,193 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 16187 transitions. Word has length 22 [2022-11-21 16:27:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:59,193 INFO L495 AbstractCegarLoop]: Abstraction has 3672 states and 16187 transitions. [2022-11-21 16:27:59,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:27:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 16187 transitions. [2022-11-21 16:27:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:27:59,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:59,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:59,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:27:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:27:59,412 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:27:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2125583979, now seen corresponding path program 7 times [2022-11-21 16:27:59,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:59,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040805834] [2022-11-21 16:27:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:00,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:00,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040805834] [2022-11-21 16:28:00,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040805834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:00,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164506017] [2022-11-21 16:28:00,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:28:00,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:00,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:00,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:00,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:28:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:28:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:01,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:28:02,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164506017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:02,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:02,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-11-21 16:28:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667116911] [2022-11-21 16:28:02,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:02,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:28:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:28:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:28:02,661 INFO L87 Difference]: Start difference. First operand 3672 states and 16187 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:09,315 INFO L93 Difference]: Finished difference Result 10196 states and 44078 transitions. [2022-11-21 16:28:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-21 16:28:09,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:28:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:09,373 INFO L225 Difference]: With dead ends: 10196 [2022-11-21 16:28:09,373 INFO L226 Difference]: Without dead ends: 10162 [2022-11-21 16:28:09,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1261, Invalid=5545, Unknown=0, NotChecked=0, Total=6806 [2022-11-21 16:28:09,375 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 512 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:09,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 0 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 16:28:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2022-11-21 16:28:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 5796. [2022-11-21 16:28:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 4.701466781708369) internal successors, (27245), 5795 states have internal predecessors, (27245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 27245 transitions. [2022-11-21 16:28:09,741 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 27245 transitions. Word has length 22 [2022-11-21 16:28:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:09,741 INFO L495 AbstractCegarLoop]: Abstraction has 5796 states and 27245 transitions. [2022-11-21 16:28:09,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 27245 transitions. [2022-11-21 16:28:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:28:09,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:09,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:09,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:09,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:28:09,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:28:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash -733614229, now seen corresponding path program 8 times [2022-11-21 16:28:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812555079] [2022-11-21 16:28:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:09,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:28:11,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812555079] [2022-11-21 16:28:11,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812555079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522265100] [2022-11-21 16:28:11,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:28:11,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:11,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:11,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:28:11,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:28:11,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:28:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:11,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:28:12,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522265100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:12,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:12,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 19 [2022-11-21 16:28:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874211461] [2022-11-21 16:28:12,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:28:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:28:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:28:12,511 INFO L87 Difference]: Start difference. First operand 5796 states and 27245 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:16,826 INFO L93 Difference]: Finished difference Result 12044 states and 53141 transitions. [2022-11-21 16:28:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:28:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 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 22 [2022-11-21 16:28:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:16,881 INFO L225 Difference]: With dead ends: 12044 [2022-11-21 16:28:16,881 INFO L226 Difference]: Without dead ends: 11986 [2022-11-21 16:28:16,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=734, Invalid=3172, Unknown=0, NotChecked=0, Total=3906 [2022-11-21 16:28:16,883 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 408 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:16,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 0 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 16:28:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2022-11-21 16:28:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 7438. [2022-11-21 16:28:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 4.824391555734839) internal successors, (35879), 7437 states have internal predecessors, (35879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 35879 transitions. [2022-11-21 16:28:17,258 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 35879 transitions. Word has length 22 [2022-11-21 16:28:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:17,259 INFO L495 AbstractCegarLoop]: Abstraction has 7438 states and 35879 transitions. [2022-11-21 16:28:17,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 35879 transitions. [2022-11-21 16:28:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:28:17,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:17,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:17,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:17,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:28:17,499 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:28:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1347855645, now seen corresponding path program 9 times [2022-11-21 16:28:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:17,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297282005] [2022-11-21 16:28:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:18,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297282005] [2022-11-21 16:28:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297282005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133909155] [2022-11-21 16:28:18,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:28:18,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:18,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:18,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:28:18,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 16:28:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:28:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:20,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133909155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:20,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:20,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-21 16:28:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728785090] [2022-11-21 16:28:20,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:28:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:28:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:28:20,419 INFO L87 Difference]: Start difference. First operand 7438 states and 35879 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:25,381 INFO L93 Difference]: Finished difference Result 14990 states and 70424 transitions. [2022-11-21 16:28:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-21 16:28:25,381 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:28:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:25,457 INFO L225 Difference]: With dead ends: 14990 [2022-11-21 16:28:25,457 INFO L226 Difference]: Without dead ends: 14840 [2022-11-21 16:28:25,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=816, Invalid=3344, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:28:25,460 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 472 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:25,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 0 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 16:28:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14840 states. [2022-11-21 16:28:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14840 to 8912. [2022-11-21 16:28:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8912 states, 8911 states have (on average 4.970822578835148) internal successors, (44295), 8911 states have internal predecessors, (44295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8912 states to 8912 states and 44295 transitions. [2022-11-21 16:28:25,992 INFO L78 Accepts]: Start accepts. Automaton has 8912 states and 44295 transitions. Word has length 22 [2022-11-21 16:28:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:25,992 INFO L495 AbstractCegarLoop]: Abstraction has 8912 states and 44295 transitions. [2022-11-21 16:28:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8912 states and 44295 transitions. [2022-11-21 16:28:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:28:26,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:26,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:26,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:26,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:26,248 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:28:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1146373085, now seen corresponding path program 10 times [2022-11-21 16:28:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846359188] [2022-11-21 16:28:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:26,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846359188] [2022-11-21 16:28:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846359188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139041658] [2022-11-21 16:28:27,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:28:27,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:27,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:27,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:28:27,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:28:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:28:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:29,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139041658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:29,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:29,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-21 16:28:29,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476117226] [2022-11-21 16:28:29,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:29,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:28:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:28:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:28:29,553 INFO L87 Difference]: Start difference. First operand 8912 states and 44295 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:38,397 INFO L93 Difference]: Finished difference Result 22062 states and 104710 transitions. [2022-11-21 16:28:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:28:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:28:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:38,472 INFO L225 Difference]: With dead ends: 22062 [2022-11-21 16:28:38,472 INFO L226 Difference]: Without dead ends: 22020 [2022-11-21 16:28:38,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1469, Invalid=6903, Unknown=0, NotChecked=0, Total=8372 [2022-11-21 16:28:38,475 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 527 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:38,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 0 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 16:28:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2022-11-21 16:28:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 13222. [2022-11-21 16:28:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13222 states, 13221 states have (on average 5.1544512517963845) internal successors, (68147), 13221 states have internal predecessors, (68147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13222 states to 13222 states and 68147 transitions. [2022-11-21 16:28:39,217 INFO L78 Accepts]: Start accepts. Automaton has 13222 states and 68147 transitions. Word has length 22 [2022-11-21 16:28:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:39,217 INFO L495 AbstractCegarLoop]: Abstraction has 13222 states and 68147 transitions. [2022-11-21 16:28:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:28:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 13222 states and 68147 transitions. [2022-11-21 16:28:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:28:39,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:39,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:39,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:39,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:39,473 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:28:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1926131883, now seen corresponding path program 11 times [2022-11-21 16:28:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:39,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885926343] [2022-11-21 16:28:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885926343] [2022-11-21 16:28:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885926343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143925332] [2022-11-21 16:28:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:28:41,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:41,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:41,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:28:41,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 16:28:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:28:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143925332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:43,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2022-11-21 16:28:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844253593] [2022-11-21 16:28:43,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:28:43,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:28:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:28:43,579 INFO L87 Difference]: Start difference. First operand 13222 states and 68147 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:19,366 INFO L93 Difference]: Finished difference Result 23656 states and 117447 transitions. [2022-11-21 16:29:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-11-21 16:29:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:29:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:19,482 INFO L225 Difference]: With dead ends: 23656 [2022-11-21 16:29:19,482 INFO L226 Difference]: Without dead ends: 23620 [2022-11-21 16:29:19,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16033 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=6025, Invalid=31031, Unknown=0, NotChecked=0, Total=37056 [2022-11-21 16:29:19,487 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:19,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 0 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-21 16:29:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23620 states. [2022-11-21 16:29:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23620 to 14250. [2022-11-21 16:29:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14250 states, 14249 states have (on average 5.22268229349428) internal successors, (74418), 14249 states have internal predecessors, (74418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14250 states to 14250 states and 74418 transitions. [2022-11-21 16:29:20,288 INFO L78 Accepts]: Start accepts. Automaton has 14250 states and 74418 transitions. Word has length 22 [2022-11-21 16:29:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:20,290 INFO L495 AbstractCegarLoop]: Abstraction has 14250 states and 74418 transitions. [2022-11-21 16:29:20,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14250 states and 74418 transitions. [2022-11-21 16:29:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:29:20,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:20,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:20,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:20,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 16:29:20,554 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:29:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash -933066325, now seen corresponding path program 12 times [2022-11-21 16:29:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94260893] [2022-11-21 16:29:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:21,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:21,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94260893] [2022-11-21 16:29:21,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94260893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:21,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576114543] [2022-11-21 16:29:21,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:29:21,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:21,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:21,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:29:21,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 16:29:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:29:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:22,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:23,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576114543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:23,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:23,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2022-11-21 16:29:23,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743624900] [2022-11-21 16:29:23,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:23,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:29:23,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:29:23,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:29:23,715 INFO L87 Difference]: Start difference. First operand 14250 states and 74418 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:29,680 INFO L93 Difference]: Finished difference Result 21764 states and 107356 transitions. [2022-11-21 16:29:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-21 16:29:29,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 22 [2022-11-21 16:29:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:29,775 INFO L225 Difference]: With dead ends: 21764 [2022-11-21 16:29:29,775 INFO L226 Difference]: Without dead ends: 21736 [2022-11-21 16:29:29,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1004, Invalid=4108, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 16:29:29,777 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 450 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:29,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 0 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 16:29:29,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21736 states. [2022-11-21 16:29:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21736 to 15524. [2022-11-21 16:29:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15524 states, 15523 states have (on average 5.278489982606455) internal successors, (81938), 15523 states have internal predecessors, (81938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15524 states to 15524 states and 81938 transitions. [2022-11-21 16:29:30,515 INFO L78 Accepts]: Start accepts. Automaton has 15524 states and 81938 transitions. Word has length 22 [2022-11-21 16:29:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:30,515 INFO L495 AbstractCegarLoop]: Abstraction has 15524 states and 81938 transitions. [2022-11-21 16:29:30,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 15524 states and 81938 transitions. [2022-11-21 16:29:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:29:30,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:30,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:30,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:30,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 16:29:30,785 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:29:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2032736085, now seen corresponding path program 13 times [2022-11-21 16:29:30,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:30,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443537940] [2022-11-21 16:29:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:32,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:32,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443537940] [2022-11-21 16:29:32,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443537940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:32,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233848904] [2022-11-21 16:29:32,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:29:32,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:32,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:32,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:29:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:29:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:32,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:34,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233848904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:34,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:34,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-11-21 16:29:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445360242] [2022-11-21 16:29:34,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:29:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:29:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:29:34,566 INFO L87 Difference]: Start difference. First operand 15524 states and 81938 transitions. Second operand has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:48,429 INFO L93 Difference]: Finished difference Result 29861 states and 150167 transitions. [2022-11-21 16:29:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-21 16:29:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:29:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:48,551 INFO L225 Difference]: With dead ends: 29861 [2022-11-21 16:29:48,551 INFO L226 Difference]: Without dead ends: 29824 [2022-11-21 16:29:48,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4286 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2217, Invalid=9555, Unknown=0, NotChecked=0, Total=11772 [2022-11-21 16:29:48,552 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 455 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:48,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 0 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 16:29:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29824 states. [2022-11-21 16:29:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29824 to 20654. [2022-11-21 16:29:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20654 states, 20653 states have (on average 5.463758291773592) internal successors, (112843), 20653 states have internal predecessors, (112843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20654 states to 20654 states and 112843 transitions. [2022-11-21 16:29:49,650 INFO L78 Accepts]: Start accepts. Automaton has 20654 states and 112843 transitions. Word has length 22 [2022-11-21 16:29:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:49,650 INFO L495 AbstractCegarLoop]: Abstraction has 20654 states and 112843 transitions. [2022-11-21 16:29:49,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20654 states and 112843 transitions. [2022-11-21 16:29:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:29:49,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:49,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:49,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:49,959 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:29:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash 845343083, now seen corresponding path program 14 times [2022-11-21 16:29:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:49,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690357670] [2022-11-21 16:29:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:51,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690357670] [2022-11-21 16:29:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690357670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225299701] [2022-11-21 16:29:51,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:29:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:51,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:51,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:29:51,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:29:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:29:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:52,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225299701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:53,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:53,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-21 16:29:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276089841] [2022-11-21 16:29:53,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:53,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:29:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:29:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:29:53,827 INFO L87 Difference]: Start difference. First operand 20654 states and 112843 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:02,219 INFO L93 Difference]: Finished difference Result 36641 states and 186064 transitions. [2022-11-21 16:30:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-21 16:30:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 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 22 [2022-11-21 16:30:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:02,377 INFO L225 Difference]: With dead ends: 36641 [2022-11-21 16:30:02,377 INFO L226 Difference]: Without dead ends: 36634 [2022-11-21 16:30:02,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=864, Invalid=3966, Unknown=0, NotChecked=0, Total=4830 [2022-11-21 16:30:02,379 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 392 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:02,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 0 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 16:30:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36634 states. [2022-11-21 16:30:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36634 to 26114. [2022-11-21 16:30:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26114 states, 26113 states have (on average 5.539501397771225) internal successors, (144653), 26113 states have internal predecessors, (144653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26114 states to 26114 states and 144653 transitions. [2022-11-21 16:30:03,780 INFO L78 Accepts]: Start accepts. Automaton has 26114 states and 144653 transitions. Word has length 22 [2022-11-21 16:30:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:03,780 INFO L495 AbstractCegarLoop]: Abstraction has 26114 states and 144653 transitions. [2022-11-21 16:30:03,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26114 states and 144653 transitions. [2022-11-21 16:30:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:30:03,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:03,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:03,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:04,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:04,076 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:30:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1706274215, now seen corresponding path program 15 times [2022-11-21 16:30:04,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:04,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657593430] [2022-11-21 16:30:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657593430] [2022-11-21 16:30:05,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657593430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141152114] [2022-11-21 16:30:05,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:30:05,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:05,335 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:05,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:30:05,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 16:30:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:30:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:30:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:06,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141152114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:07,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:07,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-11-21 16:30:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409930759] [2022-11-21 16:30:07,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:30:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:30:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:30:07,575 INFO L87 Difference]: Start difference. First operand 26114 states and 144653 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:18,638 INFO L93 Difference]: Finished difference Result 46507 states and 241673 transitions. [2022-11-21 16:30:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:30:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 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 22 [2022-11-21 16:30:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:18,845 INFO L225 Difference]: With dead ends: 46507 [2022-11-21 16:30:18,845 INFO L226 Difference]: Without dead ends: 46399 [2022-11-21 16:30:18,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2749 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1512, Invalid=6678, Unknown=0, NotChecked=0, Total=8190 [2022-11-21 16:30:18,846 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 467 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2902 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:18,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 0 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2902 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 16:30:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46399 states. [2022-11-21 16:30:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46399 to 34562. [2022-11-21 16:30:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34562 states, 34561 states have (on average 5.619744799050953) internal successors, (194224), 34561 states have internal predecessors, (194224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34562 states to 34562 states and 194224 transitions. [2022-11-21 16:30:20,814 INFO L78 Accepts]: Start accepts. Automaton has 34562 states and 194224 transitions. Word has length 22 [2022-11-21 16:30:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:20,814 INFO L495 AbstractCegarLoop]: Abstraction has 34562 states and 194224 transitions. [2022-11-21 16:30:20,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34562 states and 194224 transitions. [2022-11-21 16:30:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:30:20,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:20,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:20,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:21,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:21,147 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:30:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash 289386087, now seen corresponding path program 16 times [2022-11-21 16:30:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043453113] [2022-11-21 16:30:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:22,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043453113] [2022-11-21 16:30:22,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043453113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136072519] [2022-11-21 16:30:22,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:30:22,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:22,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:22,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:22,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:30:22,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:30:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:30:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:30:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:23,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:24,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136072519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:24,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:24,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-21 16:30:24,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317747782] [2022-11-21 16:30:24,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:24,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:30:24,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:30:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:30:24,764 INFO L87 Difference]: Start difference. First operand 34562 states and 194224 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:44,536 INFO L93 Difference]: Finished difference Result 57495 states and 303607 transitions. [2022-11-21 16:30:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-11-21 16:30:44,537 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 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 22 [2022-11-21 16:30:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:44,808 INFO L225 Difference]: With dead ends: 57495 [2022-11-21 16:30:44,808 INFO L226 Difference]: Without dead ends: 57474 [2022-11-21 16:30:44,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7530 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=3403, Invalid=16619, Unknown=0, NotChecked=0, Total=20022 [2022-11-21 16:30:44,809 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 552 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2963 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:44,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 0 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2963 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-21 16:30:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57474 states. [2022-11-21 16:30:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57474 to 43540. [2022-11-21 16:30:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43540 states, 43539 states have (on average 5.694320034911229) internal successors, (247925), 43539 states have internal predecessors, (247925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43540 states to 43540 states and 247925 transitions. [2022-11-21 16:30:47,500 INFO L78 Accepts]: Start accepts. Automaton has 43540 states and 247925 transitions. Word has length 22 [2022-11-21 16:30:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 43540 states and 247925 transitions. [2022-11-21 16:30:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 43540 states and 247925 transitions. [2022-11-21 16:30:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:30:47,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:47,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:47,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:48,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 16:30:48,170 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:30:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash -768326745, now seen corresponding path program 17 times [2022-11-21 16:30:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:48,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492872072] [2022-11-21 16:30:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492872072] [2022-11-21 16:30:49,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492872072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651058029] [2022-11-21 16:30:49,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:30:49,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:49,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:49,318 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:49,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 16:30:49,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 16:30:49,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:30:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:30:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:49,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:51,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651058029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:51,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:51,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-21 16:30:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279717126] [2022-11-21 16:30:51,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:30:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:30:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:30:51,451 INFO L87 Difference]: Start difference. First operand 43540 states and 247925 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:00,735 INFO L93 Difference]: Finished difference Result 63681 states and 351129 transitions. [2022-11-21 16:31:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-21 16:31:00,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 22 [2022-11-21 16:31:00,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:01,056 INFO L225 Difference]: With dead ends: 63681 [2022-11-21 16:31:01,056 INFO L226 Difference]: Without dead ends: 63674 [2022-11-21 16:31:01,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=963, Invalid=4889, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 16:31:01,057 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 340 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:01,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 0 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 16:31:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63674 states. [2022-11-21 16:31:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63674 to 54696. [2022-11-21 16:31:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54696 states, 54695 states have (on average 5.77917542736996) internal successors, (316092), 54695 states have internal predecessors, (316092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54696 states to 54696 states and 316092 transitions. [2022-11-21 16:31:04,518 INFO L78 Accepts]: Start accepts. Automaton has 54696 states and 316092 transitions. Word has length 22 [2022-11-21 16:31:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:04,519 INFO L495 AbstractCegarLoop]: Abstraction has 54696 states and 316092 transitions. [2022-11-21 16:31:04,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54696 states and 316092 transitions. [2022-11-21 16:31:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:31:04,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:04,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:04,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:04,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-21 16:31:04,925 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:31:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -750849711, now seen corresponding path program 18 times [2022-11-21 16:31:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:04,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193312275] [2022-11-21 16:31:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193312275] [2022-11-21 16:31:06,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193312275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028860835] [2022-11-21 16:31:06,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:31:06,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:06,182 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:06,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 16:31:06,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 16:31:06,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:31:06,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:06,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:08,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028860835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:08,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:08,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-11-21 16:31:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15391934] [2022-11-21 16:31:08,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:08,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:31:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:31:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:31:08,303 INFO L87 Difference]: Start difference. First operand 54696 states and 316092 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:20,225 INFO L93 Difference]: Finished difference Result 90645 states and 500907 transitions. [2022-11-21 16:31:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-21 16:31:20,225 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 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 22 [2022-11-21 16:31:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:20,812 INFO L225 Difference]: With dead ends: 90645 [2022-11-21 16:31:20,812 INFO L226 Difference]: Without dead ends: 90475 [2022-11-21 16:31:20,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2093, Invalid=10339, Unknown=0, NotChecked=0, Total=12432 [2022-11-21 16:31:20,813 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 810 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:20,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 0 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 16:31:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90475 states. [2022-11-21 16:31:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90475 to 78560. [2022-11-21 16:31:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78560 states, 78559 states have (on average 5.770720095724233) internal successors, (453342), 78559 states have internal predecessors, (453342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78560 states to 78560 states and 453342 transitions. [2022-11-21 16:31:25,539 INFO L78 Accepts]: Start accepts. Automaton has 78560 states and 453342 transitions. Word has length 22 [2022-11-21 16:31:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:25,539 INFO L495 AbstractCegarLoop]: Abstraction has 78560 states and 453342 transitions. [2022-11-21 16:31:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 78560 states and 453342 transitions. [2022-11-21 16:31:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:31:26,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:26,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:26,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:26,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-21 16:31:26,748 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:31:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2048537527, now seen corresponding path program 19 times [2022-11-21 16:31:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:26,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9995753] [2022-11-21 16:31:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:27,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:27,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9995753] [2022-11-21 16:31:27,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9995753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083262251] [2022-11-21 16:31:27,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:31:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:27,887 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:27,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 16:31:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:28,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:31:28,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:28,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:29,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083262251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:29,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:29,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-11-21 16:31:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49855135] [2022-11-21 16:31:29,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:29,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:31:29,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:31:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:31:29,739 INFO L87 Difference]: Start difference. First operand 78560 states and 453342 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:38,323 INFO L93 Difference]: Finished difference Result 108190 states and 600668 transitions. [2022-11-21 16:31:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-21 16:31:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-21 16:31:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:39,043 INFO L225 Difference]: With dead ends: 108190 [2022-11-21 16:31:39,044 INFO L226 Difference]: Without dead ends: 108144 [2022-11-21 16:31:39,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1447, Invalid=6385, Unknown=0, NotChecked=0, Total=7832 [2022-11-21 16:31:39,045 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 618 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:39,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 0 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 16:31:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108144 states. [2022-11-21 16:31:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108144 to 82032. [2022-11-21 16:31:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82032 states, 82031 states have (on average 5.78281381428972) internal successors, (474370), 82031 states have internal predecessors, (474370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82032 states to 82032 states and 474370 transitions. [2022-11-21 16:31:44,894 INFO L78 Accepts]: Start accepts. Automaton has 82032 states and 474370 transitions. Word has length 22 [2022-11-21 16:31:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:44,895 INFO L495 AbstractCegarLoop]: Abstraction has 82032 states and 474370 transitions. [2022-11-21 16:31:44,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 82032 states and 474370 transitions. [2022-11-21 16:31:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:31:45,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:45,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:45,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 16:31:45,353 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:31:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1507681669, now seen corresponding path program 20 times [2022-11-21 16:31:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165705828] [2022-11-21 16:31:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165705828] [2022-11-21 16:31:46,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165705828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015806858] [2022-11-21 16:31:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:31:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:46,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:46,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1385cad-d80d-4aa9-ad99-8294f58bd92a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 16:31:47,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:31:47,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:31:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:47,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:48,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015806858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:48,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:48,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2022-11-21 16:31:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571141135] [2022-11-21 16:31:48,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:31:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:31:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:31:48,474 INFO L87 Difference]: Start difference. First operand 82032 states and 474370 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)