./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:59:12,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:59:12,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:59:12,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:59:12,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:59:12,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:59:12,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:59:12,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:59:12,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:59:12,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:59:12,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:59:12,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:59:12,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:59:12,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:59:12,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:59:12,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:59:12,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:59:12,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:59:12,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:59:12,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:59:12,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:59:12,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:59:12,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:59:12,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:59:12,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:59:12,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:59:12,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:59:12,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:59:12,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:59:12,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:59:12,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:59:12,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:59:12,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:59:12,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:59:12,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:59:12,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:59:12,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:59:12,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:59:12,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:59:12,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:59:12,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:59:12,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:59:12,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:59:12,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:59:12,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:59:12,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:59:12,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:59:12,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:59:12,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:59:12,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:59:12,562 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:59:12,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:59:12,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:59:12,564 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:59:12,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:59:12,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:59:12,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:59:12,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:59:12,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:59:12,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:59:12,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:59:12,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:59:12,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:59:12,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:59:12,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:59:12,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:59:12,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:59:12,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:59:12,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:59:12,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:59:12,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:59:12,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:59:12,568 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_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 [2022-11-21 16:59:12,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:59:12,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:59:12,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:59:12,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:59:12,912 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:59:12,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-21 16:59:15,971 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:59:16,274 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:59:16,274 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-21 16:59:16,288 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/data/441717990/d56a9a168ae5422aafdc5f0e24ba8f12/FLAGbcab0482a [2022-11-21 16:59:16,308 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/data/441717990/d56a9a168ae5422aafdc5f0e24ba8f12 [2022-11-21 16:59:16,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:59:16,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:59:16,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:59:16,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:59:16,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:59:16,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725a10c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16, skipping insertion in model container [2022-11-21 16:59:16,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:59:16,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:59:16,728 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-21 16:59:16,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:59:16,777 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:59:16,833 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-21 16:59:16,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:59:16,900 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:59:16,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16 WrapperNode [2022-11-21 16:59:16,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:59:16,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:59:16,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:59:16,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:59:16,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,952 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-21 16:59:16,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:59:16,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:59:16,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:59:16,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:59:16,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:59:16,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:59:16,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:59:16,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:59:16,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (1/1) ... [2022-11-21 16:59:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:59:17,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:17,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:59:17,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:59:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 16:59:17,070 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 16:59:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 16:59:17,070 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 16:59:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:59:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:59:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:59:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:59:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:59:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:59:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:59:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:59:17,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:59:17,073 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:59:17,209 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:59:17,211 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:59:17,502 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:59:17,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:59:17,510 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:59:17,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:59:17 BoogieIcfgContainer [2022-11-21 16:59:17,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:59:17,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:59:17,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:59:17,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:59:17,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:59:16" (1/3) ... [2022-11-21 16:59:17,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290d14a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:59:17, skipping insertion in model container [2022-11-21 16:59:17,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:16" (2/3) ... [2022-11-21 16:59:17,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290d14a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:59:17, skipping insertion in model container [2022-11-21 16:59:17,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:59:17" (3/3) ... [2022-11-21 16:59:17,522 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-11-21 16:59:17,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:59:17,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-21 16:59:17,554 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:59:17,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:59:17,730 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:59:17,755 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-21 16:59:17,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-21 16:59:17,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-21 16:59:17,854 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-21 16:59:17,854 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:59:17,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-21 16:59:17,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-21 16:59:22,727 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2022-11-21 16:59:22,727 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-21 16:59:22,736 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-21 16:59:22,753 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:22,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:59:22,778 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;@49552483, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:59:22,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-21 16:59:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-21 16:59:22,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:22,786 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-21 16:59:22,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 419, now seen corresponding path program 1 times [2022-11-21 16:59:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:22,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274570063] [2022-11-21 16:59:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:22,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274570063] [2022-11-21 16:59:22,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274570063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:22,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:22,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-21 16:59:22,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255085045] [2022-11-21 16:59:22,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:59:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:59:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:59:22,937 INFO L87 Difference]: Start difference. First operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:22,997 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-21 16:59:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:59:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-21 16:59:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:23,013 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:59:23,013 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 16:59:23,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:59:23,018 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:23,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:59:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 16:59:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-21 16:59:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 49 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-21 16:59:23,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-21 16:59:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:23,070 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-21 16:59:23,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-21 16:59:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:59:23,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:23,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:59:23,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:59:23,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:23,072 INFO L85 PathProgramCache]: Analyzing trace with hash 410526, now seen corresponding path program 1 times [2022-11-21 16:59:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:23,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868044411] [2022-11-21 16:59:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:23,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:23,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868044411] [2022-11-21 16:59:23,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868044411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:23,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:23,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:59:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698406999] [2022-11-21 16:59:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:23,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:23,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:23,334 INFO L87 Difference]: Start difference. First operand 50 states and 134 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:23,386 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-21 16:59:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-21 16:59:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:23,389 INFO L225 Difference]: With dead ends: 47 [2022-11-21 16:59:23,389 INFO L226 Difference]: Without dead ends: 47 [2022-11-21 16:59:23,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:23,391 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:23,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:59:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-21 16:59:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-21 16:59:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 2.909090909090909) internal successors, (128), 46 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-21 16:59:23,398 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-21 16:59:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:23,399 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-21 16:59:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-21 16:59:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:59:23,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:23,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:59:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:59:23,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash 410527, now seen corresponding path program 1 times [2022-11-21 16:59:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:23,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020512166] [2022-11-21 16:59:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:23,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020512166] [2022-11-21 16:59:23,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020512166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:23,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:23,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:59:23,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666319734] [2022-11-21 16:59:23,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:23,545 INFO L87 Difference]: Start difference. First operand 47 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:23,586 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-21 16:59:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:23,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-21 16:59:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:23,588 INFO L225 Difference]: With dead ends: 44 [2022-11-21 16:59:23,589 INFO L226 Difference]: Without dead ends: 44 [2022-11-21 16:59:23,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:23,593 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:23,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:59:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-21 16:59:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-21 16:59:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-21 16:59:23,613 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-21 16:59:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:23,613 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-21 16:59:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-21 16:59:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:59:23,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:23,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:59:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:59:23,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash -654675701, now seen corresponding path program 1 times [2022-11-21 16:59:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:23,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875441866] [2022-11-21 16:59:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:23,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875441866] [2022-11-21 16:59:23,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875441866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:23,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:23,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:59:23,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463263532] [2022-11-21 16:59:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:23,726 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:23,768 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-21 16:59:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 16:59:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:23,770 INFO L225 Difference]: With dead ends: 53 [2022-11-21 16:59:23,770 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 16:59:23,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:23,774 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:23,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:59:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 16:59:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-21 16:59:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-21 16:59:23,794 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-21 16:59:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:23,794 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-21 16:59:23,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-21 16:59:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:59:23,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:23,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:23,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:59:23,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1179889916, now seen corresponding path program 1 times [2022-11-21 16:59:23,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:23,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876327541] [2022-11-21 16:59:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:23,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876327541] [2022-11-21 16:59:23,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876327541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:23,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937640597] [2022-11-21 16:59:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:23,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:23,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:23,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:59:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:59:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:24,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:24,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937640597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:24,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:59:24,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-21 16:59:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564430177] [2022-11-21 16:59:24,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:24,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:59:24,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:59:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:59:24,072 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:24,158 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-21 16:59:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:59:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 16:59:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:24,160 INFO L225 Difference]: With dead ends: 80 [2022-11-21 16:59:24,160 INFO L226 Difference]: Without dead ends: 80 [2022-11-21 16:59:24,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:59:24,161 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:24,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:59:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-21 16:59:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-21 16:59:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.948717948717949) internal successors, (230), 79 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-21 16:59:24,168 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-21 16:59:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:24,168 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-21 16:59:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-21 16:59:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:59:24,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:24,170 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:24,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:24,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:24,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 88302923, now seen corresponding path program 2 times [2022-11-21 16:59:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:24,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14551524] [2022-11-21 16:59:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:24,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14551524] [2022-11-21 16:59:24,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14551524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820587734] [2022-11-21 16:59:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:59:24,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:24,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:24,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:59:24,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:59:24,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:59:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:59:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:24,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:24,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820587734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:24,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:59:24,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-21 16:59:24,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251850981] [2022-11-21 16:59:24,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:24,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:59:24,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:24,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:59:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:59:24,797 INFO L87 Difference]: Start difference. First operand 80 states and 230 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:24,986 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-21 16:59:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:59:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 16:59:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:24,988 INFO L225 Difference]: With dead ends: 134 [2022-11-21 16:59:24,988 INFO L226 Difference]: Without dead ends: 134 [2022-11-21 16:59:24,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:59:24,989 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:24,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:59:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-21 16:59:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-21 16:59:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 133 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-21 16:59:25,003 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-21 16:59:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:25,007 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-21 16:59:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-21 16:59:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:59:25,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:25,009 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:25,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:59:25,209 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1112545195, now seen corresponding path program 3 times [2022-11-21 16:59:25,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:25,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037376151] [2022-11-21 16:59:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:25,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:25,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:25,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037376151] [2022-11-21 16:59:25,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037376151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:25,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100280962] [2022-11-21 16:59:25,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:59:25,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:25,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:25,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:25,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:59:25,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:59:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:59:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:59:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:25,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:25,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100280962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:25,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:59:25,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-21 16:59:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325370152] [2022-11-21 16:59:25,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:25,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:59:25,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:59:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:59:25,952 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:26,290 INFO L93 Difference]: Finished difference Result 242 states and 716 transitions. [2022-11-21 16:59:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:59:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-21 16:59:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:26,293 INFO L225 Difference]: With dead ends: 242 [2022-11-21 16:59:26,293 INFO L226 Difference]: Without dead ends: 242 [2022-11-21 16:59:26,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:59:26,294 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 345 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:26,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 0 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:59:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-21 16:59:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-11-21 16:59:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 2.9833333333333334) internal successors, (716), 241 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 716 transitions. [2022-11-21 16:59:26,312 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 716 transitions. Word has length 16 [2022-11-21 16:59:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:26,313 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 716 transitions. [2022-11-21 16:59:26,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 716 transitions. [2022-11-21 16:59:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:59:26,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:26,320 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:26,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:26,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash 144286827, now seen corresponding path program 4 times [2022-11-21 16:59:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964150894] [2022-11-21 16:59:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964150894] [2022-11-21 16:59:27,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964150894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530604655] [2022-11-21 16:59:27,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:59:27,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:27,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:27,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:59:27,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:59:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:59:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:59:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:27,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:27,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530604655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:27,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:59:27,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-11-21 16:59:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90258657] [2022-11-21 16:59:27,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:27,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:59:27,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:27,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:59:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:59:27,770 INFO L87 Difference]: Start difference. First operand 242 states and 716 transitions. Second operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:28,027 INFO L93 Difference]: Finished difference Result 260 states and 770 transitions. [2022-11-21 16:59:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:59:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-21 16:59:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:28,029 INFO L225 Difference]: With dead ends: 260 [2022-11-21 16:59:28,029 INFO L226 Difference]: Without dead ends: 260 [2022-11-21 16:59:28,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:59:28,030 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 369 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:28,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:59:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-21 16:59:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-11-21 16:59:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 258 states have (on average 2.9844961240310077) internal successors, (770), 259 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 770 transitions. [2022-11-21 16:59:28,058 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 770 transitions. Word has length 28 [2022-11-21 16:59:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:28,059 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 770 transitions. [2022-11-21 16:59:28,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 770 transitions. [2022-11-21 16:59:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 16:59:28,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:28,065 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:28,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:28,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:28,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 16:59:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1220692619, now seen corresponding path program 5 times [2022-11-21 16:59:28,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824607628] [2022-11-21 16:59:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:28,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:30,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824607628] [2022-11-21 16:59:30,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824607628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:30,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727326213] [2022-11-21 16:59:30,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:59:30,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:30,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:30,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:30,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:59:30,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-21 16:59:30,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:59:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-21 16:59:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:32,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:59:34,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727326213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:34,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:59:34,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-11-21 16:59:34,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610395644] [2022-11-21 16:59:34,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:34,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-21 16:59:34,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-21 16:59:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 16:59:34,353 INFO L87 Difference]: Start difference. First operand 260 states and 770 transitions. Second operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:01:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:01:34,438 INFO L93 Difference]: Finished difference Result 48051 states and 142663 transitions. [2022-11-21 17:01:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-11-21 17:01:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 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 30 [2022-11-21 17:01:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:01:34,793 INFO L225 Difference]: With dead ends: 48051 [2022-11-21 17:01:34,793 INFO L226 Difference]: Without dead ends: 48051 [2022-11-21 17:01:34,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 642 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202191 ImplicationChecksByTransitivity, 108.5s TimeCoverageRelationStatistics Valid=75264, Invalid=338828, Unknown=0, NotChecked=0, Total=414092 [2022-11-21 17:01:34,845 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 10542 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8183 mSolverCounterSat, 3637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10542 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3637 IncrementalHoareTripleChecker+Valid, 8183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:01:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10542 Valid, 0 Invalid, 11820 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3637 Valid, 8183 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-21 17:01:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48051 states. [2022-11-21 17:01:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48051 to 38653. [2022-11-21 17:01:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38653 states, 38651 states have (on average 3.2407182220382396) internal successors, (125257), 38652 states have internal predecessors, (125257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:01:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38653 states to 38653 states and 125257 transitions. [2022-11-21 17:01:36,784 INFO L78 Accepts]: Start accepts. Automaton has 38653 states and 125257 transitions. Word has length 30 [2022-11-21 17:01:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:01:36,785 INFO L495 AbstractCegarLoop]: Abstraction has 38653 states and 125257 transitions. [2022-11-21 17:01:36,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:01:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38653 states and 125257 transitions. [2022-11-21 17:01:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:01:36,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:01:36,882 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-11-21 17:01:36,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:01:37,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:01:37,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 17:01:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:01:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1220692621, now seen corresponding path program 1 times [2022-11-21 17:01:37,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:01:37,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256609334] [2022-11-21 17:01:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:37,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:01:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-21 17:01:37,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256609334] [2022-11-21 17:01:37,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256609334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:01:37,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:01:37,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:01:37,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654940825] [2022-11-21 17:01:37,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:01:37,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:01:37,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:01:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:01:37,415 INFO L87 Difference]: Start difference. First operand 38653 states and 125257 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:01:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:01:38,119 INFO L93 Difference]: Finished difference Result 38644 states and 122718 transitions. [2022-11-21 17:01:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:01:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-21 17:01:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:01:38,753 INFO L225 Difference]: With dead ends: 38644 [2022-11-21 17:01:38,753 INFO L226 Difference]: Without dead ends: 38618 [2022-11-21 17:01:38,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:01:38,754 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:01:38,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:01:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38618 states. [2022-11-21 17:01:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38618 to 38294. [2022-11-21 17:01:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38294 states, 38293 states have (on average 3.1942130415480636) internal successors, (122316), 38293 states have internal predecessors, (122316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:01:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38294 states to 38294 states and 122316 transitions. [2022-11-21 17:01:40,582 INFO L78 Accepts]: Start accepts. Automaton has 38294 states and 122316 transitions. Word has length 30 [2022-11-21 17:01:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:01:40,583 INFO L495 AbstractCegarLoop]: Abstraction has 38294 states and 122316 transitions. [2022-11-21 17:01:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:01:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 38294 states and 122316 transitions. [2022-11-21 17:01:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 17:01:40,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:01:40,888 INFO L195 NwaCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:01:40,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:01:40,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-21 17:01:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:01:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1107658269, now seen corresponding path program 1 times [2022-11-21 17:01:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:01:40,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114250735] [2022-11-21 17:01:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:01:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:01:43,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:43,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114250735] [2022-11-21 17:01:43,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114250735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:01:43,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051883207] [2022-11-21 17:01:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:01:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:01:43,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:01:43,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023a0e42-073e-4159-bee7-e31e6074ca43/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:01:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-21 17:01:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:01:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 253 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:01:45,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:01:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:01:47,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051883207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:01:47,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:01:47,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-21 17:01:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45736792] [2022-11-21 17:01:47,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:01:47,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-21 17:01:47,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-21 17:01:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=5671, Unknown=0, NotChecked=0, Total=6806 [2022-11-21 17:01:47,474 INFO L87 Difference]: Start difference. First operand 38294 states and 122316 transitions. Second operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:20,952 INFO L93 Difference]: Finished difference Result 1599117 states and 5173015 transitions. [2022-11-21 17:05:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 753 states. [2022-11-21 17:05:20,952 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 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 33 [2022-11-21 17:05:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:31,565 INFO L225 Difference]: With dead ends: 1599117 [2022-11-21 17:05:31,565 INFO L226 Difference]: Without dead ends: 1569958 [2022-11-21 17:05:31,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 804 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320427 ImplicationChecksByTransitivity, 179.8s TimeCoverageRelationStatistics Valid=172746, Invalid=476084, Unknown=0, NotChecked=0, Total=648830 [2022-11-21 17:05:31,607 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 10967 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10286 mSolverCounterSat, 2705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10967 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 12991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2705 IncrementalHoareTripleChecker+Valid, 10286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:31,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10967 Valid, 0 Invalid, 12991 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2705 Valid, 10286 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-11-21 17:05:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569958 states.