./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8 --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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- 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-e04fb08 [2022-11-16 12:21:25,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:21:25,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:21:25,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:21:25,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:21:25,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:21:25,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:21:25,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:21:25,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:21:25,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:21:25,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:21:25,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:21:25,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:21:25,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:21:25,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:21:25,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:21:25,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:21:25,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:21:25,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:21:25,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:21:25,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:21:25,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:21:26,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:21:26,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:21:26,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:21:26,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:21:26,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:21:26,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:21:26,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:21:26,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:21:26,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:21:26,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:21:26,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:21:26,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:21:26,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:21:26,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:21:26,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:21:26,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:21:26,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:21:26,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:21:26,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:21:26,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:21:26,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:21:26,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:21:26,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:21:26,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:21:26,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:21:26,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:21:26,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:21:26,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:21:26,064 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:21:26,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:21:26,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:21:26,065 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:21:26,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:21:26,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:21:26,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:21:26,066 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:21:26,066 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:21:26,067 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:21:26,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:21:26,067 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:21:26,067 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:21:26,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:21:26,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:21:26,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:21:26,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:21:26,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:21:26,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:21:26,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:21:26,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:21:26,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:21:26,070 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_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-11-16 12:21:26,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:21:26,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:21:26,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:21:26,377 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:21:26,379 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:21:26,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-16 12:21:26,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/data/ff2dc3834/077e2f476da041fd8a076c9fc051f4b1/FLAG1e0331b71 [2022-11-16 12:21:26,993 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:21:26,994 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-16 12:21:27,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/data/ff2dc3834/077e2f476da041fd8a076c9fc051f4b1/FLAG1e0331b71 [2022-11-16 12:21:27,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/data/ff2dc3834/077e2f476da041fd8a076c9fc051f4b1 [2022-11-16 12:21:27,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:21:27,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:21:27,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:21:27,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:21:27,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:21:27,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7083884e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27, skipping insertion in model container [2022-11-16 12:21:27,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:21:27,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:21:27,574 WARN L229 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_563cf930-73f3-4249-90bf-a3bb6ef01c19/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-16 12:21:27,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:21:27,587 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:21:27,610 WARN L229 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_563cf930-73f3-4249-90bf-a3bb6ef01c19/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-16 12:21:27,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:21:27,626 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:21:27,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27 WrapperNode [2022-11-16 12:21:27,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:21:27,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:21:27,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:21:27,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:21:27,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,665 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-16 12:21:27,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:21:27,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:21:27,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:21:27,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:21:27,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,689 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:21:27,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:21:27,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:21:27,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:21:27,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (1/1) ... [2022-11-16 12:21:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:21:27,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:27,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:21:27,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:21:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:21:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:21:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:21:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:21:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:21:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:21:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:21:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:21:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:21:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:21:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:21:27,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:21:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:21:27,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:21:27,792 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:21:27,887 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:21:27,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:21:28,174 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:21:28,240 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:21:28,240 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:21:28,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:21:28 BoogieIcfgContainer [2022-11-16 12:21:28,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:21:28,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:21:28,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:21:28,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:21:28,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:21:27" (1/3) ... [2022-11-16 12:21:28,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1251a43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:21:28, skipping insertion in model container [2022-11-16 12:21:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:27" (2/3) ... [2022-11-16 12:21:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1251a43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:21:28, skipping insertion in model container [2022-11-16 12:21:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:21:28" (3/3) ... [2022-11-16 12:21:28,256 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-11-16 12:21:28,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:21:28,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 12:21:28,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:21:28,441 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:21:28,498 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:21:28,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 100 transitions, 216 flow [2022-11-16 12:21:28,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 100 transitions, 216 flow [2022-11-16 12:21:28,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 100 transitions, 216 flow [2022-11-16 12:21:28,601 INFO L130 PetriNetUnfolder]: 6/98 cut-off events. [2022-11-16 12:21:28,602 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:21:28,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 98 events. 6/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2022-11-16 12:21:28,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2022-11-16 12:21:32,959 INFO L134 LiptonReduction]: Checked pairs total: 1052 [2022-11-16 12:21:32,960 INFO L136 LiptonReduction]: Total number of compositions: 100 [2022-11-16 12:21:32,970 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2022-11-16 12:21:32,993 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 103 states, 93 states have (on average 2.6559139784946235) internal successors, (247), 102 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:33,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:21:33,021 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;@230c8a1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:21:33,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-16 12:21:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 93 states have (on average 2.6559139784946235) internal successors, (247), 102 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 12:21:33,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:33,030 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 12:21:33,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash 402, now seen corresponding path program 1 times [2022-11-16 12:21:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842616644] [2022-11-16 12:21:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842616644] [2022-11-16 12:21:33,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842616644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:33,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:33,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 12:21:33,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119086302] [2022-11-16 12:21:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:21:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:21:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:21:33,224 INFO L87 Difference]: Start difference. First operand has 103 states, 93 states have (on average 2.6559139784946235) internal successors, (247), 102 states have internal predecessors, (247), 0 states have call successors, (0), 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) [2022-11-16 12:21:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:33,301 INFO L93 Difference]: Finished difference Result 100 states and 244 transitions. [2022-11-16 12:21:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:21:33,304 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 [2022-11-16 12:21:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:33,317 INFO L225 Difference]: With dead ends: 100 [2022-11-16 12:21:33,317 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 12:21:33,318 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 [2022-11-16 12:21:33,322 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:33,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 12:21:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-16 12:21:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 93 states have (on average 2.6236559139784945) internal successors, (244), 99 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 244 transitions. [2022-11-16 12:21:33,375 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 244 transitions. Word has length 1 [2022-11-16 12:21:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:33,376 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 244 transitions. [2022-11-16 12:21:33,376 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) [2022-11-16 12:21:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 244 transitions. [2022-11-16 12:21:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:21:33,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:33,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:21:33,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:21:33,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash 394077, now seen corresponding path program 1 times [2022-11-16 12:21:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:33,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452403190] [2022-11-16 12:21:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:33,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:33,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452403190] [2022-11-16 12:21:33,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452403190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:33,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:33,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911485905] [2022-11-16 12:21:33,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:33,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:33,578 INFO L87 Difference]: Start difference. First operand 100 states and 244 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) [2022-11-16 12:21:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:33,635 INFO L93 Difference]: Finished difference Result 92 states and 228 transitions. [2022-11-16 12:21:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:33,636 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 [2022-11-16 12:21:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:33,638 INFO L225 Difference]: With dead ends: 92 [2022-11-16 12:21:33,638 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 12:21:33,639 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 [2022-11-16 12:21:33,640 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:33,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 12:21:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-16 12:21:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 2.6206896551724137) internal successors, (228), 91 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 228 transitions. [2022-11-16 12:21:33,656 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 228 transitions. Word has length 3 [2022-11-16 12:21:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:33,657 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 228 transitions. [2022-11-16 12:21:33,657 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) [2022-11-16 12:21:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 228 transitions. [2022-11-16 12:21:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:21:33,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:33,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:21:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:21:33,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 394078, now seen corresponding path program 1 times [2022-11-16 12:21:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057083610] [2022-11-16 12:21:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:33,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:33,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057083610] [2022-11-16 12:21:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057083610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:33,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487246859] [2022-11-16 12:21:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:33,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:33,797 INFO L87 Difference]: Start difference. First operand 92 states and 228 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) [2022-11-16 12:21:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:33,830 INFO L93 Difference]: Finished difference Result 84 states and 212 transitions. [2022-11-16 12:21:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:33,831 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 [2022-11-16 12:21:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:33,832 INFO L225 Difference]: With dead ends: 84 [2022-11-16 12:21:33,833 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 12:21:33,833 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 [2022-11-16 12:21:33,835 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:33,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 12:21:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-16 12:21:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 2.617283950617284) internal successors, (212), 83 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2022-11-16 12:21:33,846 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 3 [2022-11-16 12:21:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:33,847 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2022-11-16 12:21:33,847 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) [2022-11-16 12:21:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2022-11-16 12:21:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:21:33,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:33,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:21:33,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:21:33,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash 378718553, now seen corresponding path program 1 times [2022-11-16 12:21:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:33,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698255012] [2022-11-16 12:21:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:33,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698255012] [2022-11-16 12:21:33,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698255012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:33,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:33,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:21:33,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398973657] [2022-11-16 12:21:33,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:33,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:33,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:33,970 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-16 12:21:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:34,004 INFO L93 Difference]: Finished difference Result 68 states and 164 transitions. [2022-11-16 12:21:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:34,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2022-11-16 12:21:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:34,006 INFO L225 Difference]: With dead ends: 68 [2022-11-16 12:21:34,006 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 12:21:34,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:34,008 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:34,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 12:21:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-16 12:21:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 2.484848484848485) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 164 transitions. [2022-11-16 12:21:34,017 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 164 transitions. Word has length 5 [2022-11-16 12:21:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:34,018 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 164 transitions. [2022-11-16 12:21:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-16 12:21:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 164 transitions. [2022-11-16 12:21:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:21:34,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:34,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:21:34,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:21:34,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 378718555, now seen corresponding path program 1 times [2022-11-16 12:21:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:34,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390095195] [2022-11-16 12:21:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:34,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390095195] [2022-11-16 12:21:34,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390095195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:34,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:34,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:21:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678239844] [2022-11-16 12:21:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:34,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:34,186 INFO L87 Difference]: Start difference. First operand 68 states and 164 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-16 12:21:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:34,224 INFO L93 Difference]: Finished difference Result 52 states and 116 transitions. [2022-11-16 12:21:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2022-11-16 12:21:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:34,227 INFO L225 Difference]: With dead ends: 52 [2022-11-16 12:21:34,227 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 12:21:34,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:34,229 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:34,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 12:21:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 12:21:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2022-11-16 12:21:34,256 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 5 [2022-11-16 12:21:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:34,257 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2022-11-16 12:21:34,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-16 12:21:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2022-11-16 12:21:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:21:34,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:34,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:34,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:21:34,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1480117829, now seen corresponding path program 1 times [2022-11-16 12:21:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425426020] [2022-11-16 12:21:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:34,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425426020] [2022-11-16 12:21:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425426020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:34,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:34,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:21:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253586935] [2022-11-16 12:21:34,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:34,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:34,512 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:34,640 INFO L93 Difference]: Finished difference Result 80 states and 184 transitions. [2022-11-16 12:21:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:21:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:21:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:34,642 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:21:34,642 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:21:34,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:21:34,644 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:34,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:21:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-11-16 12:21:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 150 transitions. [2022-11-16 12:21:34,651 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 150 transitions. Word has length 13 [2022-11-16 12:21:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:34,652 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 150 transitions. [2022-11-16 12:21:34,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 150 transitions. [2022-11-16 12:21:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:21:34,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:34,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:21:34,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -280990417, now seen corresponding path program 1 times [2022-11-16 12:21:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:34,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713166638] [2022-11-16 12:21:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:34,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:34,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713166638] [2022-11-16 12:21:34,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713166638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667255548] [2022-11-16 12:21:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:34,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:34,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:21:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:21:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:35,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:35,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667255548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:35,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:35,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-11-16 12:21:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793056970] [2022-11-16 12:21:35,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:35,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:21:35,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:21:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:21:35,675 INFO L87 Difference]: Start difference. First operand 66 states and 150 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:35,912 INFO L93 Difference]: Finished difference Result 106 states and 240 transitions. [2022-11-16 12:21:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:21:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:21:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:35,914 INFO L225 Difference]: With dead ends: 106 [2022-11-16 12:21:35,914 INFO L226 Difference]: Without dead ends: 98 [2022-11-16 12:21:35,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:21:35,915 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:35,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:21:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-16 12:21:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2022-11-16 12:21:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3492063492063493) internal successors, (148), 63 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 148 transitions. [2022-11-16 12:21:35,930 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 148 transitions. Word has length 15 [2022-11-16 12:21:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:35,930 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 148 transitions. [2022-11-16 12:21:35,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 148 transitions. [2022-11-16 12:21:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:21:35,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:35,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:35,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:36,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:21:36,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1414832145, now seen corresponding path program 1 times [2022-11-16 12:21:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:36,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894794741] [2022-11-16 12:21:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894794741] [2022-11-16 12:21:37,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894794741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178916379] [2022-11-16 12:21:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:37,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:37,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:37,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:21:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:21:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:37,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178916379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:38,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:38,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-16 12:21:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662112983] [2022-11-16 12:21:38,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:38,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:21:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:21:38,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:21:38,500 INFO L87 Difference]: Start difference. First operand 64 states and 148 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:43,521 INFO L93 Difference]: Finished difference Result 320 states and 755 transitions. [2022-11-16 12:21:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 12:21:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:21:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:43,523 INFO L225 Difference]: With dead ends: 320 [2022-11-16 12:21:43,524 INFO L226 Difference]: Without dead ends: 246 [2022-11-16 12:21:43,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=668, Invalid=2088, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 12:21:43,526 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 327 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:43,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 0 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:21:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-16 12:21:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 100. [2022-11-16 12:21:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4343434343434343) internal successors, (241), 99 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 241 transitions. [2022-11-16 12:21:43,536 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 241 transitions. Word has length 15 [2022-11-16 12:21:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:43,537 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 241 transitions. [2022-11-16 12:21:43,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 241 transitions. [2022-11-16 12:21:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:21:43,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:43,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:43,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:21:43,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:43,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:21:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1401888777, now seen corresponding path program 1 times [2022-11-16 12:21:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969938522] [2022-11-16 12:21:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:46,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:46,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969938522] [2022-11-16 12:21:46,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969938522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:46,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518527746] [2022-11-16 12:21:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:46,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:46,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:46,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:21:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:21:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:47,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:49,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518527746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:49,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:49,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-11-16 12:21:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805192373] [2022-11-16 12:21:49,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:21:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:21:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:21:49,380 INFO L87 Difference]: Start difference. First operand 100 states and 241 transitions. Second operand has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2022-11-16 12:21:53,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:22:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:22:01,785 INFO L93 Difference]: Finished difference Result 444 states and 1033 transitions. [2022-11-16 12:22:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 12:22:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 19 [2022-11-16 12:22:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:22:01,790 INFO L225 Difference]: With dead ends: 444 [2022-11-16 12:22:01,790 INFO L226 Difference]: Without dead ends: 362 [2022-11-16 12:22:01,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=786, Invalid=2996, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 12:22:01,793 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 305 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:22:01,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 0 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-16 12:22:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-16 12:22:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 170. [2022-11-16 12:22:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 169 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2022-11-16 12:22:01,804 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 19 [2022-11-16 12:22:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:01,810 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2022-11-16 12:22:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2022-11-16 12:22:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2022-11-16 12:22:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:22:01,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:01,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:01,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:02,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:22:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash 310690895, now seen corresponding path program 2 times [2022-11-16 12:22:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:02,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15753973] [2022-11-16 12:22:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:03,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15753973] [2022-11-16 12:22:03,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15753973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208213845] [2022-11-16 12:22:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:22:03,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:03,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:03,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:03,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:22:03,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:22:03,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:03,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:22:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:04,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:06,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208213845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:06,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:06,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-11-16 12:22:06,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80406779] [2022-11-16 12:22:06,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:06,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:22:06,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:06,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:22:06,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:22:06,262 INFO L87 Difference]: Start difference. First operand 170 states and 424 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) [2022-11-16 12:22:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:22:18,277 INFO L93 Difference]: Finished difference Result 517 states and 1209 transitions. [2022-11-16 12:22:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:22:18,278 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 19 [2022-11-16 12:22:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:22:18,280 INFO L225 Difference]: With dead ends: 517 [2022-11-16 12:22:18,280 INFO L226 Difference]: Without dead ends: 382 [2022-11-16 12:22:18,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=868, Invalid=3688, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 12:22:18,283 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 379 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:22:18,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 0 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 12:22:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-16 12:22:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 230. [2022-11-16 12:22:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.6026200873362444) internal successors, (596), 229 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 596 transitions. [2022-11-16 12:22:18,294 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 596 transitions. Word has length 19 [2022-11-16 12:22:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:18,294 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 596 transitions. [2022-11-16 12:22:18,295 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) [2022-11-16 12:22:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 596 transitions. [2022-11-16 12:22:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:22:18,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:18,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:18,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:22:18,502 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:22:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 146002131, now seen corresponding path program 3 times [2022-11-16 12:22:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002945980] [2022-11-16 12:22:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:18,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002945980] [2022-11-16 12:22:18,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002945980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:18,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:22:18,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:22:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626780132] [2022-11-16 12:22:18,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:18,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:22:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:22:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:22:18,699 INFO L87 Difference]: Start difference. First operand 230 states and 596 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:22:18,855 INFO L93 Difference]: Finished difference Result 300 states and 777 transitions. [2022-11-16 12:22:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:22:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2022-11-16 12:22:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:22:18,858 INFO L225 Difference]: With dead ends: 300 [2022-11-16 12:22:18,858 INFO L226 Difference]: Without dead ends: 300 [2022-11-16 12:22:18,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:22:18,859 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:22:18,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:22:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-16 12:22:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 200. [2022-11-16 12:22:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.577889447236181) internal successors, (513), 199 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 513 transitions. [2022-11-16 12:22:18,867 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 513 transitions. Word has length 19 [2022-11-16 12:22:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:18,867 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 513 transitions. [2022-11-16 12:22:18,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 513 transitions. [2022-11-16 12:22:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:22:18,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:18,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:18,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:22:18,869 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:22:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:18,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1167282613, now seen corresponding path program 4 times [2022-11-16 12:22:18,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:18,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765734998] [2022-11-16 12:22:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:20,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765734998] [2022-11-16 12:22:20,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765734998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720933201] [2022-11-16 12:22:20,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:22:20,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:20,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:20,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:22:20,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:22:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:22:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:21,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:23,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720933201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:23,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:23,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-11-16 12:22:23,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630606566] [2022-11-16 12:22:23,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:23,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:22:23,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:23,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:22:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:22:23,884 INFO L87 Difference]: Start difference. First operand 200 states and 513 transitions. Second operand has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2022-11-16 12:22:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:22:41,016 INFO L93 Difference]: Finished difference Result 491 states and 1186 transitions. [2022-11-16 12:22:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:22:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 19 [2022-11-16 12:22:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:22:41,019 INFO L225 Difference]: With dead ends: 491 [2022-11-16 12:22:41,019 INFO L226 Difference]: Without dead ends: 396 [2022-11-16 12:22:41,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=734, Invalid=2806, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 12:22:41,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 259 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:22:41,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 0 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 12:22:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-16 12:22:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 224. [2022-11-16 12:22:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6143497757847536) internal successors, (583), 223 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 583 transitions. [2022-11-16 12:22:41,030 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 583 transitions. Word has length 19 [2022-11-16 12:22:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:41,030 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 583 transitions. [2022-11-16 12:22:41,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2022-11-16 12:22:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 583 transitions. [2022-11-16 12:22:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:22:41,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:41,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:41,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:41,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:22:41,238 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:22:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash 76084731, now seen corresponding path program 5 times [2022-11-16 12:22:41,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:41,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226518255] [2022-11-16 12:22:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:41,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226518255] [2022-11-16 12:22:42,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226518255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387153106] [2022-11-16 12:22:42,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:22:42,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:42,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:42,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:42,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:22:42,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:22:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:22:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:45,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387153106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:45,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:45,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-11-16 12:22:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558533397] [2022-11-16 12:22:45,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:45,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:22:45,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:22:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:22:45,488 INFO L87 Difference]: Start difference. First operand 224 states and 583 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) [2022-11-16 12:23:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:16,138 INFO L93 Difference]: Finished difference Result 561 states and 1372 transitions. [2022-11-16 12:23:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:23:16,139 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 19 [2022-11-16 12:23:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:16,141 INFO L225 Difference]: With dead ends: 561 [2022-11-16 12:23:16,142 INFO L226 Difference]: Without dead ends: 466 [2022-11-16 12:23:16,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=870, Invalid=3036, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 12:23:16,143 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 323 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:16,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 0 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-16 12:23:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-16 12:23:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 252. [2022-11-16 12:23:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.649402390438247) internal successors, (665), 251 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 665 transitions. [2022-11-16 12:23:16,156 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 665 transitions. Word has length 19 [2022-11-16 12:23:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:16,156 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 665 transitions. [2022-11-16 12:23:16,156 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) [2022-11-16 12:23:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 665 transitions. [2022-11-16 12:23:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:23:16,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:16,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:16,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:16,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:23:16,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:23:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1031010191, now seen corresponding path program 6 times [2022-11-16 12:23:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:16,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400928427] [2022-11-16 12:23:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:17,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:17,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400928427] [2022-11-16 12:23:17,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400928427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:17,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210620165] [2022-11-16 12:23:17,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:23:17,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:17,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:17,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:23:17,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:23:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:23:17,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:18,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:20,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210620165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:20,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:20,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 29 [2022-11-16 12:23:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779872649] [2022-11-16 12:23:20,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:23:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:23:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:23:20,422 INFO L87 Difference]: Start difference. First operand 252 states and 665 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:53,771 INFO L93 Difference]: Finished difference Result 767 states and 1788 transitions. [2022-11-16 12:23:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-16 12:23:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2022-11-16 12:23:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:53,774 INFO L225 Difference]: With dead ends: 767 [2022-11-16 12:23:53,774 INFO L226 Difference]: Without dead ends: 610 [2022-11-16 12:23:53,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3686 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=2159, Invalid=8347, Unknown=0, NotChecked=0, Total=10506 [2022-11-16 12:23:53,778 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 551 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:53,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 0 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 12:23:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-11-16 12:23:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 300. [2022-11-16 12:23:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.682274247491639) internal successors, (802), 299 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 802 transitions. [2022-11-16 12:23:53,792 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 802 transitions. Word has length 19 [2022-11-16 12:23:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:53,793 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 802 transitions. [2022-11-16 12:23:53,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 802 transitions. [2022-11-16 12:23:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:23:53,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:53,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:53,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:23:53,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:23:54,000 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:23:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1927417629, now seen corresponding path program 2 times [2022-11-16 12:23:54,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109525233] [2022-11-16 12:23:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:55,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:55,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109525233] [2022-11-16 12:23:55,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109525233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:55,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501052232] [2022-11-16 12:23:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:23:55,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:55,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:55,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:23:55,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:23:55,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:23:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:56,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:56,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501052232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:56,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:56,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-16 12:23:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851820979] [2022-11-16 12:23:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:23:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:23:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:23:56,928 INFO L87 Difference]: Start difference. First operand 300 states and 802 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:27,350 INFO L93 Difference]: Finished difference Result 784 states and 2024 transitions. [2022-11-16 12:24:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-16 12:24:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2022-11-16 12:24:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:27,354 INFO L225 Difference]: With dead ends: 784 [2022-11-16 12:24:27,355 INFO L226 Difference]: Without dead ends: 726 [2022-11-16 12:24:27,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=2150, Invalid=9406, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 12:24:27,359 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 417 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:27,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 0 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 12:24:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-16 12:24:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 332. [2022-11-16 12:24:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.700906344410876) internal successors, (894), 331 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 894 transitions. [2022-11-16 12:24:27,381 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 894 transitions. Word has length 19 [2022-11-16 12:24:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:27,382 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 894 transitions. [2022-11-16 12:24:27,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 894 transitions. [2022-11-16 12:24:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:24:27,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:27,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:27,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:27,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:27,602 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:24:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash -818751821, now seen corresponding path program 7 times [2022-11-16 12:24:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:27,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484761943] [2022-11-16 12:24:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:24:28,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:28,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484761943] [2022-11-16 12:24:28,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484761943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:28,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781594160] [2022-11-16 12:24:28,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:24:28,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:28,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:28,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:28,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:24:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:24:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:24:28,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:24:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:24:28,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781594160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:28,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:28,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-11-16 12:24:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044767815] [2022-11-16 12:24:28,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:24:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:24:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:24:28,835 INFO L87 Difference]: Start difference. First operand 332 states and 894 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:30,565 INFO L93 Difference]: Finished difference Result 860 states and 2200 transitions. [2022-11-16 12:24:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:24:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2022-11-16 12:24:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:30,571 INFO L225 Difference]: With dead ends: 860 [2022-11-16 12:24:30,571 INFO L226 Difference]: Without dead ends: 860 [2022-11-16 12:24:30,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:24:30,573 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 171 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:30,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 0 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:24:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-16 12:24:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 434. [2022-11-16 12:24:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.8060046189376444) internal successors, (1215), 433 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1215 transitions. [2022-11-16 12:24:30,592 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1215 transitions. Word has length 21 [2022-11-16 12:24:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:30,592 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 1215 transitions. [2022-11-16 12:24:30,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1215 transitions. [2022-11-16 12:24:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:24:30,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:30,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:30,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:30,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:24:30,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:24:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2031264719, now seen corresponding path program 8 times [2022-11-16 12:24:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462531873] [2022-11-16 12:24:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:24:32,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462531873] [2022-11-16 12:24:32,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462531873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116689435] [2022-11-16 12:24:32,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:24:32,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:32,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:32,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:24:32,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:24:32,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:24:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:24:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:24:34,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:24:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:24:37,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116689435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:37,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:37,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 34 [2022-11-16 12:24:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909866221] [2022-11-16 12:24:37,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:37,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:24:37,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:24:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:24:37,405 INFO L87 Difference]: Start difference. First operand 434 states and 1215 transitions. Second operand has 36 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:44,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:00,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:38,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:38,812 INFO L93 Difference]: Finished difference Result 1233 states and 3032 transitions. [2022-11-16 12:26:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-16 12:26:38,812 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 12:26:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:38,818 INFO L225 Difference]: With dead ends: 1233 [2022-11-16 12:26:38,818 INFO L226 Difference]: Without dead ends: 1204 [2022-11-16 12:26:38,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7927 ImplicationChecksByTransitivity, 104.4s TimeCoverageRelationStatistics Valid=3144, Invalid=19206, Unknown=0, NotChecked=0, Total=22350 [2022-11-16 12:26:38,825 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 559 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 191 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:38,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 0 Invalid, 3043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2851 Invalid, 1 Unknown, 0 Unchecked, 20.4s Time] [2022-11-16 12:26:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-11-16 12:26:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 548. [2022-11-16 12:26:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.881170018281536) internal successors, (1576), 547 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1576 transitions. [2022-11-16 12:26:38,850 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1576 transitions. Word has length 21 [2022-11-16 12:26:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:38,850 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 1576 transitions. [2022-11-16 12:26:38,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1576 transitions. [2022-11-16 12:26:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:26:38,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:38,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:38,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:39,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:39,058 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:26:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1938337263, now seen corresponding path program 9 times [2022-11-16 12:26:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:39,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146249688] [2022-11-16 12:26:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:40,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:40,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146249688] [2022-11-16 12:26:40,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146249688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:40,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20061813] [2022-11-16 12:26:40,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:26:40,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:40,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:40,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:40,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:26:40,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:26:40,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:26:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:44,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20061813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:44,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:44,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-16 12:26:44,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279554363] [2022-11-16 12:26:44,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:44,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:26:44,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:26:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:26:44,871 INFO L87 Difference]: Start difference. First operand 548 states and 1576 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:03,524 INFO L93 Difference]: Finished difference Result 1302 states and 3458 transitions. [2022-11-16 12:28:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-16 12:28:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 12:28:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:03,530 INFO L225 Difference]: With dead ends: 1302 [2022-11-16 12:28:03,531 INFO L226 Difference]: Without dead ends: 1132 [2022-11-16 12:28:03,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=1892, Invalid=9235, Unknown=3, NotChecked=0, Total=11130 [2022-11-16 12:28:03,533 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 579 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:03,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 0 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2022-11-16 12:28:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-16 12:28:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 690. [2022-11-16 12:28:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.81422351233672) internal successors, (1939), 689 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1939 transitions. [2022-11-16 12:28:03,560 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1939 transitions. Word has length 21 [2022-11-16 12:28:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:03,560 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1939 transitions. [2022-11-16 12:28:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1939 transitions. [2022-11-16 12:28:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:28:03,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:03,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:03,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:03,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:28:03,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:28:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1663692093, now seen corresponding path program 10 times [2022-11-16 12:28:03,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:03,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325055314] [2022-11-16 12:28:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:28:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:04,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325055314] [2022-11-16 12:28:04,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325055314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311693] [2022-11-16 12:28:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:28:04,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:04,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:28:04,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:28:04,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:28:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:04,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:28:05,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:05,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:05,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2022-11-16 12:28:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923935107] [2022-11-16 12:28:05,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:05,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:28:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:28:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:28:05,263 INFO L87 Difference]: Start difference. First operand 690 states and 1939 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:07,448 INFO L93 Difference]: Finished difference Result 1314 states and 3512 transitions. [2022-11-16 12:28:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:28:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2022-11-16 12:28:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:07,457 INFO L225 Difference]: With dead ends: 1314 [2022-11-16 12:28:07,457 INFO L226 Difference]: Without dead ends: 1314 [2022-11-16 12:28:07,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:28:07,458 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 218 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:07,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:28:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2022-11-16 12:28:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 822. [2022-11-16 12:28:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.8781973203410476) internal successors, (2363), 821 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2363 transitions. [2022-11-16 12:28:07,491 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2363 transitions. Word has length 21 [2022-11-16 12:28:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:07,491 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 2363 transitions. [2022-11-16 12:28:07,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2363 transitions. [2022-11-16 12:28:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:28:07,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:07,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:07,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:07,699 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:28:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1599227391, now seen corresponding path program 11 times [2022-11-16 12:28:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211539834] [2022-11-16 12:28:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:07,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:09,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:09,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211539834] [2022-11-16 12:28:09,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211539834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:09,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228887796] [2022-11-16 12:28:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:28:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:09,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:09,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:28:09,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:28:09,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:28:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:10,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:14,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228887796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:14,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:14,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-16 12:28:14,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604448117] [2022-11-16 12:28:14,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:14,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:28:14,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:28:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:28:14,646 INFO L87 Difference]: Start difference. First operand 822 states and 2363 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:35,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:20,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:20,751 INFO L93 Difference]: Finished difference Result 1510 states and 4120 transitions. [2022-11-16 12:29:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 12:29:20,752 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2022-11-16 12:29:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:20,758 INFO L225 Difference]: With dead ends: 1510 [2022-11-16 12:29:20,758 INFO L226 Difference]: Without dead ends: 1394 [2022-11-16 12:29:20,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=1561, Invalid=7559, Unknown=0, NotChecked=0, Total=9120 [2022-11-16 12:29:20,760 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 337 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:20,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 0 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1768 Invalid, 1 Unknown, 0 Unchecked, 15.4s Time] [2022-11-16 12:29:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-11-16 12:29:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 904. [2022-11-16 12:29:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.892580287929125) internal successors, (2612), 903 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2612 transitions. [2022-11-16 12:29:20,795 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2612 transitions. Word has length 21 [2022-11-16 12:29:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:20,795 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 2612 transitions. [2022-11-16 12:29:20,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2612 transitions. [2022-11-16 12:29:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:29:20,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:20,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:20,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:21,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:21,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:29:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1604542023, now seen corresponding path program 12 times [2022-11-16 12:29:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426907231] [2022-11-16 12:29:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:21,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:22,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426907231] [2022-11-16 12:29:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426907231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699723395] [2022-11-16 12:29:22,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:29:22,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:22,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:22,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:29:22,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:29:22,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:29:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:29:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:24,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:26,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699723395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:26,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:26,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-11-16 12:29:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511617101] [2022-11-16 12:29:26,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:26,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:29:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:29:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:29:26,948 INFO L87 Difference]: Start difference. First operand 904 states and 2612 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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) [2022-11-16 12:30:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:34,706 INFO L93 Difference]: Finished difference Result 1741 states and 4754 transitions. [2022-11-16 12:30:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-16 12:30:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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 21 [2022-11-16 12:30:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:34,713 INFO L225 Difference]: With dead ends: 1741 [2022-11-16 12:30:34,713 INFO L226 Difference]: Without dead ends: 1594 [2022-11-16 12:30:34,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=2378, Invalid=11664, Unknown=0, NotChecked=0, Total=14042 [2022-11-16 12:30:34,716 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 511 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:34,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 0 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-11-16 12:30:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-11-16 12:30:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1006. [2022-11-16 12:30:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.9144278606965175) internal successors, (2929), 1005 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2929 transitions. [2022-11-16 12:30:34,754 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2929 transitions. Word has length 21 [2022-11-16 12:30:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:34,755 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 2929 transitions. [2022-11-16 12:30:34,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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) [2022-11-16 12:30:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2929 transitions. [2022-11-16 12:30:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:30:34,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:34,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:34,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:34,964 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:30:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1290813483, now seen corresponding path program 13 times [2022-11-16 12:30:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:34,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023424391] [2022-11-16 12:30:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:36,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023424391] [2022-11-16 12:30:36,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023424391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100362079] [2022-11-16 12:30:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:30:36,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:36,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:36,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:30:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:30:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:37,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:40,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100362079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:40,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:40,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2022-11-16 12:30:40,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142048804] [2022-11-16 12:30:40,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:40,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:30:40,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:30:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:30:40,071 INFO L87 Difference]: Start difference. First operand 1006 states and 2929 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:08,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:32:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:22,531 INFO L93 Difference]: Finished difference Result 2181 states and 5737 transitions. [2022-11-16 12:32:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-16 12:32:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-16 12:32:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:22,538 INFO L225 Difference]: With dead ends: 2181 [2022-11-16 12:32:22,538 INFO L226 Difference]: Without dead ends: 1984 [2022-11-16 12:32:22,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13404 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=5427, Invalid=29354, Unknown=1, NotChecked=0, Total=34782 [2022-11-16 12:32:22,541 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 677 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:22,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 0 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time] [2022-11-16 12:32:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-11-16 12:32:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 962. [2022-11-16 12:32:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.881373569198751) internal successors, (2769), 961 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2769 transitions. [2022-11-16 12:32:22,581 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2769 transitions. Word has length 21 [2022-11-16 12:32:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:22,582 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 2769 transitions. [2022-11-16 12:32:22,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2769 transitions. [2022-11-16 12:32:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:32:22,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:22,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:22,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:22,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:32:22,791 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:32:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash 292924937, now seen corresponding path program 14 times [2022-11-16 12:32:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:22,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668423137] [2022-11-16 12:32:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:22,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:32:25,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668423137] [2022-11-16 12:32:25,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668423137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:32:25,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207713322] [2022-11-16 12:32:25,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:32:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:25,722 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:32:25,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:32:26,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:32:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:32:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:28,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:33,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207713322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:33,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:32:33,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-11-16 12:32:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410251092] [2022-11-16 12:32:33,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:33,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:32:33,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:32:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:32:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:32:33,839 INFO L87 Difference]: Start difference. First operand 962 states and 2769 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:21,220 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 161 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:33:29,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:46,090 INFO L93 Difference]: Finished difference Result 1452 states and 3958 transitions. [2022-11-16 12:33:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 12:33:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 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 23 [2022-11-16 12:33:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:46,097 INFO L225 Difference]: With dead ends: 1452 [2022-11-16 12:33:46,098 INFO L226 Difference]: Without dead ends: 1370 [2022-11-16 12:33:46,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 58.7s TimeCoverageRelationStatistics Valid=994, Invalid=4262, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 12:33:46,098 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:46,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 0 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1272 Invalid, 1 Unknown, 0 Unchecked, 19.1s Time] [2022-11-16 12:33:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-11-16 12:33:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1028. [2022-11-16 12:33:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.882181110029211) internal successors, (2960), 1027 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2960 transitions. [2022-11-16 12:33:46,131 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2960 transitions. Word has length 23 [2022-11-16 12:33:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:46,131 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 2960 transitions. [2022-11-16 12:33:46,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2960 transitions. [2022-11-16 12:33:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:33:46,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:46,135 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:46,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:46,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:46,342 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 12:33:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash -798272945, now seen corresponding path program 15 times [2022-11-16 12:33:46,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:46,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373762152] [2022-11-16 12:33:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:48,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373762152] [2022-11-16 12:33:48,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373762152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207062008] [2022-11-16 12:33:48,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:48,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:48,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:48,779 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:48,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563cf930-73f3-4249-90bf-a3bb6ef01c19/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:33:49,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 12:33:49,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:33:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:52,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:00,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207062008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:00,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:34:00,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-11-16 12:34:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915826246] [2022-11-16 12:34:00,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:00,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:34:00,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:34:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:34:00,594 INFO L87 Difference]: Start difference. First operand 1028 states and 2960 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:20,511 WARN L233 SmtUtils]: Spent 11.43s on a formula simplification. DAG size of input: 134 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:34:33,402 WARN L233 SmtUtils]: Spent 9.53s on a formula simplification. DAG size of input: 135 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:35:08,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:35:49,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []