./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:50:33,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:50:33,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:50:33,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:50:33,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:50:33,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:50:33,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:50:33,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:50:33,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:50:33,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:50:33,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:50:33,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:50:33,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:50:33,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:50:33,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:50:33,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:50:33,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:50:33,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:50:33,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:50:33,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:50:33,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:50:33,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:50:33,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:50:33,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:50:33,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:50:33,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:50:33,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:50:33,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:50:33,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:50:33,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:50:33,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:50:33,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:50:33,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:50:33,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:50:33,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:50:33,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:50:33,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:50:33,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:50:33,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:50:33,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:50:33,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:50:33,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:50:33,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:50:33,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:50:33,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:50:33,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:50:33,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:50:33,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:50:33,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:50:33,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:50:33,307 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:50:33,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:50:33,308 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:50:33,309 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:50:33,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:50:33,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:50:33,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:50:33,310 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:50:33,311 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:50:33,311 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:50:33,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:50:33,312 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:50:33,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:50:33,312 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:50:33,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:50:33,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:50:33,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:50:33,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:50:33,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:50:33,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:50:33,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:50:33,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:50:33,315 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_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2022-11-16 12:50:33,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:50:33,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:50:33,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:50:33,735 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:50:33,736 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:50:33,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread/fib_safe-12.i [2022-11-16 12:50:33,813 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/data/b454e66d4/503448d353cb4e99853d2a8a38d451be/FLAG92e26b87d [2022-11-16 12:50:34,504 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:50:34,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/sv-benchmarks/c/pthread/fib_safe-12.i [2022-11-16 12:50:34,529 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/data/b454e66d4/503448d353cb4e99853d2a8a38d451be/FLAG92e26b87d [2022-11-16 12:50:34,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/data/b454e66d4/503448d353cb4e99853d2a8a38d451be [2022-11-16 12:50:34,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:50:34,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:50:34,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:50:34,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:50:34,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:50:34,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:50:34" (1/1) ... [2022-11-16 12:50:34,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f036b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:34, skipping insertion in model container [2022-11-16 12:50:34,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:50:34" (1/1) ... [2022-11-16 12:50:34,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:50:34,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:50:35,268 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-11-16 12:50:35,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:50:35,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:50:35,334 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-11-16 12:50:35,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:50:35,384 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:50:35,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35 WrapperNode [2022-11-16 12:50:35,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:50:35,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:50:35,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:50:35,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:50:35,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,461 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-16 12:50:35,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:50:35,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:50:35,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:50:35,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:50:35,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,509 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:50:35,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:50:35,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:50:35,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:50:35,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (1/1) ... [2022-11-16 12:50:35,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:50:35,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:35,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:50:35,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:50:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 12:50:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 12:50:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 12:50:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 12:50:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:50:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:50:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:50:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:50:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:50:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:50:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:50:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:50:35,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:50:35,619 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:50:35,778 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:50:35,781 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:50:35,998 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:50:36,007 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:50:36,007 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:50:36,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:50:36 BoogieIcfgContainer [2022-11-16 12:50:36,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:50:36,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:50:36,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:50:36,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:50:36,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:50:34" (1/3) ... [2022-11-16 12:50:36,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4895c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:50:36, skipping insertion in model container [2022-11-16 12:50:36,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:50:35" (2/3) ... [2022-11-16 12:50:36,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4895c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:50:36, skipping insertion in model container [2022-11-16 12:50:36,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:50:36" (3/3) ... [2022-11-16 12:50:36,044 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2022-11-16 12:50:36,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:50:36,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-16 12:50:36,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:50:36,173 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:50:36,228 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:50:36,246 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-16 12:50:36,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-16 12:50:36,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-16 12:50:36,374 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-16 12:50:36,375 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:50:36,382 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. [2022-11-16 12:50:36,387 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-16 12:50:41,703 INFO L134 LiptonReduction]: Checked pairs total: 1734 [2022-11-16 12:50:41,703 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-16 12:50:41,713 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-16 12:50:41,731 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) [2022-11-16 12:50:41,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:50:41,759 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;@559de1cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:50:41,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 12:50:41,762 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) [2022-11-16 12:50:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 12:50:41,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:41,769 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 12:50:41,769 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)] === [2022-11-16 12:50:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 416, now seen corresponding path program 1 times [2022-11-16 12:50:41,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:41,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889410638] [2022-11-16 12:50:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889410638] [2022-11-16 12:50:41,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889410638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:41,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:41,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 12:50:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944135010] [2022-11-16 12:50:41,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:41,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:50:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:41,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:50:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:50:41,953 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) [2022-11-16 12:50:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:42,020 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-16 12:50:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:50:42,023 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-16 12:50:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:42,037 INFO L225 Difference]: With dead ends: 50 [2022-11-16 12:50:42,038 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 12:50:42,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:50:42,045 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 [2022-11-16 12:50:42,047 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] [2022-11-16 12:50:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 12:50:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 12:50:42,111 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) [2022-11-16 12:50:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-16 12:50:42,114 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-16 12:50:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:42,115 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-16 12:50:42,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-16 12:50:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:50:42,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:42,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:50:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:50:42,120 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)] === [2022-11-16 12:50:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 410520, now seen corresponding path program 1 times [2022-11-16 12:50:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:42,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304831819] [2022-11-16 12:50:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304831819] [2022-11-16 12:50:42,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304831819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:42,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:42,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:50:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426093120] [2022-11-16 12:50:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:42,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:42,461 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) [2022-11-16 12:50:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:42,516 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-16 12:50:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:50:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:42,520 INFO L225 Difference]: With dead ends: 47 [2022-11-16 12:50:42,521 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 12:50:42,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:42,525 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 [2022-11-16 12:50:42,525 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] [2022-11-16 12:50:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 12:50:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-16 12:50:42,538 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) [2022-11-16 12:50:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-16 12:50:42,545 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-16 12:50:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:42,545 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-16 12:50:42,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-16 12:50:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:50:42,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:42,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:50:42,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:50:42,547 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)] === [2022-11-16 12:50:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash 410521, now seen corresponding path program 1 times [2022-11-16 12:50:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:42,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3975784] [2022-11-16 12:50:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:42,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:42,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3975784] [2022-11-16 12:50:42,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3975784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:42,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:42,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:50:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792014003] [2022-11-16 12:50:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:42,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:42,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:42,680 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) [2022-11-16 12:50:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:42,723 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-16 12:50:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:42,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:50:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:42,726 INFO L225 Difference]: With dead ends: 44 [2022-11-16 12:50:42,726 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 12:50:42,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:42,730 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 [2022-11-16 12:50:42,732 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] [2022-11-16 12:50:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 12:50:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-16 12:50:42,751 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) [2022-11-16 12:50:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-16 12:50:42,753 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-16 12:50:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:42,754 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-16 12:50:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-16 12:50:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:50:42,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:42,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:50:42,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:50:42,756 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)] === [2022-11-16 12:50:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:42,757 INFO L85 PathProgramCache]: Analyzing trace with hash -654854385, now seen corresponding path program 1 times [2022-11-16 12:50:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:42,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258722973] [2022-11-16 12:50:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:42,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:42,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258722973] [2022-11-16 12:50:42,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258722973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:42,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:42,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979425876] [2022-11-16 12:50:42,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:42,883 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) [2022-11-16 12:50:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:42,939 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-16 12:50:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:42,940 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 [2022-11-16 12:50:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:42,941 INFO L225 Difference]: With dead ends: 53 [2022-11-16 12:50:42,942 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 12:50:42,942 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 [2022-11-16 12:50:42,945 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 [2022-11-16 12:50:42,947 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] [2022-11-16 12:50:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 12:50:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-16 12:50:42,960 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) [2022-11-16 12:50:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-16 12:50:42,965 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-16 12:50:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:42,966 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-16 12:50:42,966 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) [2022-11-16 12:50:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-16 12:50:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:50:42,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:42,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:50:42,969 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)] === [2022-11-16 12:50:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1174350712, now seen corresponding path program 1 times [2022-11-16 12:50:42,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:42,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478249593] [2022-11-16 12:50:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:43,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478249593] [2022-11-16 12:50:43,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478249593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970268341] [2022-11-16 12:50:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:43,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:43,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:43,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:43,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:50:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:43,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:50:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:43,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:43,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970268341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:43,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:50:43,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:50:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775388402] [2022-11-16 12:50:43,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:50:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:50:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:50:43,293 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) [2022-11-16 12:50:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:43,408 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-16 12:50:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:50:43,409 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 [2022-11-16 12:50:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:43,410 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:50:43,410 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:50:43,411 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 [2022-11-16 12:50:43,411 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 [2022-11-16 12:50:43,412 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] [2022-11-16 12:50:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:50:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 12:50:43,431 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) [2022-11-16 12:50:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-16 12:50:43,432 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-16 12:50:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:43,432 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-16 12:50:43,432 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) [2022-11-16 12:50:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-16 12:50:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:50:43,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:43,434 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:43,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:43,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:43,641 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)] === [2022-11-16 12:50:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1721366193, now seen corresponding path program 2 times [2022-11-16 12:50:43,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:43,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456368599] [2022-11-16 12:50:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456368599] [2022-11-16 12:50:43,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456368599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734937100] [2022-11-16 12:50:43,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:50:43,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:43,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:43,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:43,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:50:43,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:50:43,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:50:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:43,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:44,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734937100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:44,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:50:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 12:50:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840524036] [2022-11-16 12:50:44,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:50:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:50:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:50:44,085 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) [2022-11-16 12:50:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:44,290 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-16 12:50:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:50:44,291 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 [2022-11-16 12:50:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:44,295 INFO L225 Difference]: With dead ends: 134 [2022-11-16 12:50:44,295 INFO L226 Difference]: Without dead ends: 134 [2022-11-16 12:50:44,296 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 [2022-11-16 12:50:44,297 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:44,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:50:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-16 12:50:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-16 12:50:44,317 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) [2022-11-16 12:50:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-16 12:50:44,323 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-16 12:50:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-16 12:50:44,324 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) [2022-11-16 12:50:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-16 12:50:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:44,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:44,327 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:44,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:44,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:50:44,534 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)] === [2022-11-16 12:50:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash 109095087, now seen corresponding path program 3 times [2022-11-16 12:50:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:44,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264414869] [2022-11-16 12:50:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:44,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:44,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264414869] [2022-11-16 12:50:44,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264414869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854591237] [2022-11-16 12:50:44,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:50:44,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:44,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:44,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:44,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:50:44,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:50:44,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:50:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:45,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:45,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854591237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:45,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:50:45,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 12:50:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062501679] [2022-11-16 12:50:45,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:45,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:50:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:50:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:50:45,358 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) [2022-11-16 12:50:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:45,752 INFO L93 Difference]: Finished difference Result 242 states and 716 transitions. [2022-11-16 12:50:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:50:45,755 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 [2022-11-16 12:50:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:45,760 INFO L225 Difference]: With dead ends: 242 [2022-11-16 12:50:45,760 INFO L226 Difference]: Without dead ends: 242 [2022-11-16 12:50:45,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:50:45,762 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 [2022-11-16 12:50:45,762 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] [2022-11-16 12:50:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-16 12:50:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-11-16 12:50:45,795 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) [2022-11-16 12:50:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 716 transitions. [2022-11-16 12:50:45,797 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 716 transitions. Word has length 16 [2022-11-16 12:50:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:45,797 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 716 transitions. [2022-11-16 12:50:45,798 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) [2022-11-16 12:50:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 716 transitions. [2022-11-16 12:50:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:50:45,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:45,805 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:45,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:46,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:46,012 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)] === [2022-11-16 12:50:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:46,012 INFO L85 PathProgramCache]: Analyzing trace with hash -175845521, now seen corresponding path program 4 times [2022-11-16 12:50:46,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:46,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221784689] [2022-11-16 12:50:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:46,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:46,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221784689] [2022-11-16 12:50:46,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221784689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397452134] [2022-11-16 12:50:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:50:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:46,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:46,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:50:46,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:50:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:50:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:47,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:47,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397452134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:47,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:50:47,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2022-11-16 12:50:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342875997] [2022-11-16 12:50:47,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:47,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:50:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:50:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:50:47,617 INFO L87 Difference]: Start difference. First operand 242 states and 716 transitions. Second operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:48,001 INFO L93 Difference]: Finished difference Result 278 states and 824 transitions. [2022-11-16 12:50:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:50:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2022-11-16 12:50:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:48,005 INFO L225 Difference]: With dead ends: 278 [2022-11-16 12:50:48,005 INFO L226 Difference]: Without dead ends: 278 [2022-11-16 12:50:48,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 20 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:50:48,008 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 411 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:48,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 0 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:50:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-16 12:50:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-11-16 12:50:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 2.9855072463768115) internal successors, (824), 277 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 824 transitions. [2022-11-16 12:50:48,025 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 824 transitions. Word has length 28 [2022-11-16 12:50:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:48,026 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 824 transitions. [2022-11-16 12:50:48,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 824 transitions. [2022-11-16 12:50:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 12:50:48,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:48,034 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:48,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:50:48,246 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)] === [2022-11-16 12:50:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -17829457, now seen corresponding path program 5 times [2022-11-16 12:50:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885413673] [2022-11-16 12:50:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:48,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885413673] [2022-11-16 12:50:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885413673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810125580] [2022-11-16 12:50:50,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:50:50,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:50,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:50,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:50,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:50:50,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-16 12:50:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 12:50:50,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:52,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:55,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810125580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:55,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:50:55,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-16 12:50:55,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270927595] [2022-11-16 12:50:55,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:55,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-16 12:50:55,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-16 12:50:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=5584, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 12:50:55,326 INFO L87 Difference]: Start difference. First operand 278 states and 824 transitions. Second operand has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:49,692 INFO L93 Difference]: Finished difference Result 60017 states and 178237 transitions. [2022-11-16 12:53:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 697 states. [2022-11-16 12:53:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 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 32 [2022-11-16 12:53:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:50,339 INFO L225 Difference]: With dead ends: 60017 [2022-11-16 12:53:50,340 INFO L226 Difference]: Without dead ends: 60017 [2022-11-16 12:53:50,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 747 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275535 ImplicationChecksByTransitivity, 165.8s TimeCoverageRelationStatistics Valid=99787, Invalid=460465, Unknown=0, NotChecked=0, Total=560252 [2022-11-16 12:53:50,419 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13005 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5623 mSolverCounterSat, 3492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13005 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3492 IncrementalHoareTripleChecker+Valid, 5623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:50,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13005 Valid, 0 Invalid, 9115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3492 Valid, 5623 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-16 12:53:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60017 states. [2022-11-16 12:53:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60017 to 48684. [2022-11-16 12:53:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48684 states, 48682 states have (on average 3.233392218889939) internal successors, (157408), 48683 states have internal predecessors, (157408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48684 states to 48684 states and 157408 transitions. [2022-11-16 12:53:53,067 INFO L78 Accepts]: Start accepts. Automaton has 48684 states and 157408 transitions. Word has length 32 [2022-11-16 12:53:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:53,069 INFO L495 AbstractCegarLoop]: Abstraction has 48684 states and 157408 transitions. [2022-11-16 12:53:53,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 48684 states and 157408 transitions. [2022-11-16 12:53:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 12:53:53,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:53,202 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:53,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:53,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:53:53,409 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)] === [2022-11-16 12:53:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash -17829452, now seen corresponding path program 1 times [2022-11-16 12:53:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:53,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608215503] [2022-11-16 12:53:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-16 12:53:54,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:54,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608215503] [2022-11-16 12:53:54,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608215503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:54,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:54,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:53:54,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369402394] [2022-11-16 12:53:54,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:53:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:54,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:53:54,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:53:54,191 INFO L87 Difference]: Start difference. First operand 48684 states and 157408 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) [2022-11-16 12:53:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:54,767 INFO L93 Difference]: Finished difference Result 48675 states and 154453 transitions. [2022-11-16 12:53:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:53:54,768 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 32 [2022-11-16 12:53:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:55,096 INFO L225 Difference]: With dead ends: 48675 [2022-11-16 12:53:55,097 INFO L226 Difference]: Without dead ends: 48647 [2022-11-16 12:53:55,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:53:55,098 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 [2022-11-16 12:53:55,100 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] [2022-11-16 12:53:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48647 states. [2022-11-16 12:53:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48647 to 48270. [2022-11-16 12:53:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48270 states, 48269 states have (on average 3.1902877623319315) internal successors, (153992), 48269 states have internal predecessors, (153992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48270 states to 48270 states and 153992 transitions. [2022-11-16 12:53:58,118 INFO L78 Accepts]: Start accepts. Automaton has 48270 states and 153992 transitions. Word has length 32 [2022-11-16 12:53:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:58,121 INFO L495 AbstractCegarLoop]: Abstraction has 48270 states and 153992 transitions. [2022-11-16 12:53:58,121 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) [2022-11-16 12:53:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48270 states and 153992 transitions. [2022-11-16 12:53:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:53:58,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:58,531 INFO L195 NwaCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:58,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:53:58,532 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)] === [2022-11-16 12:53:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1208629802, now seen corresponding path program 1 times [2022-11-16 12:53:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:58,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080306366] [2022-11-16 12:53:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 352 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:59,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080306366] [2022-11-16 12:53:59,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080306366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852337] [2022-11-16 12:53:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:59,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:59,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:53:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:59,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:53:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:59,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:59,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:59,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:53:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [29] total 30 [2022-11-16 12:53:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242091082] [2022-11-16 12:53:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:53:59,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:53:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:53:59,832 INFO L87 Difference]: Start difference. First operand 48270 states and 153992 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:00,825 INFO L93 Difference]: Finished difference Result 48647 states and 151433 transitions. [2022-11-16 12:54:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:54:00,825 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2022-11-16 12:54:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:01,173 INFO L225 Difference]: With dead ends: 48647 [2022-11-16 12:54:01,173 INFO L226 Difference]: Without dead ends: 48268 [2022-11-16 12:54:01,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:54:01,175 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 169 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:01,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 0 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:54:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48268 states. [2022-11-16 12:54:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48268 to 1944. [2022-11-16 12:54:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 2.957797220792589) internal successors, (5747), 1943 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 5747 transitions. [2022-11-16 12:54:02,067 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 5747 transitions. Word has length 35 [2022-11-16 12:54:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:02,068 INFO L495 AbstractCegarLoop]: Abstraction has 1944 states and 5747 transitions. [2022-11-16 12:54:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 5747 transitions. [2022-11-16 12:54:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:54:02,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:02,074 INFO L195 NwaCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:02,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:02,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:02,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:54:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1208630267, now seen corresponding path program 2 times [2022-11-16 12:54:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970976267] [2022-11-16 12:54:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:04,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:04,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970976267] [2022-11-16 12:54:04,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970976267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:54:04,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745155713] [2022-11-16 12:54:04,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:54:04,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:04,952 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:54:05,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:54:05,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:54:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 12:54:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 300 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:07,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:10,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745155713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:10,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:54:10,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-11-16 12:54:10,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721696125] [2022-11-16 12:54:10,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-16 12:54:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-16 12:54:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=6530, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 12:54:10,785 INFO L87 Difference]: Start difference. First operand 1944 states and 5747 transitions. Second operand has 89 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:59:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:59:16,220 INFO L93 Difference]: Finished difference Result 69842 states and 206130 transitions. [2022-11-16 12:59:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 784 states. [2022-11-16 12:59:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 0 states have call successors, (0), 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 35 [2022-11-16 12:59:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:59:16,509 INFO L225 Difference]: With dead ends: 69842 [2022-11-16 12:59:16,509 INFO L226 Difference]: Without dead ends: 69552 [2022-11-16 12:59:16,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 839 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351330 ImplicationChecksByTransitivity, 280.4s TimeCoverageRelationStatistics Valid=190679, Invalid=515761, Unknown=0, NotChecked=0, Total=706440 [2022-11-16 12:59:16,565 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11583 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10234 mSolverCounterSat, 3142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11583 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3142 IncrementalHoareTripleChecker+Valid, 10234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:59:16,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11583 Valid, 0 Invalid, 13376 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3142 Valid, 10234 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-11-16 12:59:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69552 states. [2022-11-16 12:59:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69552 to 4047. [2022-11-16 12:59:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 3.27928818586258) internal successors, (13268), 4046 states have internal predecessors, (13268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:59:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 13268 transitions. [2022-11-16 12:59:17,527 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 13268 transitions. Word has length 35 [2022-11-16 12:59:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:59:17,528 INFO L495 AbstractCegarLoop]: Abstraction has 4047 states and 13268 transitions. [2022-11-16 12:59:17,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:59:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 13268 transitions. [2022-11-16 12:59:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:59:17,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:59:17,541 INFO L195 NwaCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:59:17,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:59:17,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:59:17,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:59:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:59:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 822117461, now seen corresponding path program 1 times [2022-11-16 12:59:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:59:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157933172] [2022-11-16 12:59:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:59:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:59:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:59:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:59:20,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:59:20,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157933172] [2022-11-16 12:59:20,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157933172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:59:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702142936] [2022-11-16 12:59:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:59:20,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:59:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:59:20,257 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:59:20,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c740275-7759-455e-bb4d-4fa6595ebc32/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:59:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:59:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 12:59:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:59:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 300 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:59:23,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:59:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:59:26,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702142936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:59:26,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:59:26,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-11-16 12:59:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049043164] [2022-11-16 12:59:26,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:59:26,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-16 12:59:26,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:59:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-16 12:59:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=6530, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 12:59:26,851 INFO L87 Difference]: Start difference. First operand 4047 states and 13268 transitions. Second operand has 89 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)