./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe020_power.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/config/GemCutterMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe020_power.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/config/svcomp-DerefFreeMemtrack-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k --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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd91eb07499c204f7750c4a87fd11eb7780a100da5928fd001cd5e1a53feff12 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 01:52:23,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 01:52:23,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 01:52:23,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 01:52:23,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 01:52:23,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 01:52:23,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 01:52:23,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 01:52:23,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 01:52:23,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 01:52:23,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 01:52:23,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 01:52:23,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 01:52:23,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 01:52:23,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 01:52:23,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 01:52:23,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 01:52:23,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 01:52:23,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 01:52:23,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 01:52:23,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 01:52:23,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 01:52:23,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 01:52:23,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 01:52:23,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 01:52:23,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 01:52:23,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 01:52:23,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 01:52:23,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 01:52:23,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 01:52:23,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 01:52:23,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 01:52:23,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 01:52:23,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 01:52:23,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 01:52:23,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 01:52:23,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 01:52:23,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 01:52:23,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 01:52:23,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 01:52:23,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 01:52:23,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/config/svcomp-DerefFreeMemtrack-32bit-GemCutter_Default.epf [2022-11-18 01:52:23,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 01:52:23,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 01:52:23,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 01:52:23,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 01:52:23,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 01:52:23,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 01:52:23,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 01:52:23,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 01:52:23,246 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 01:52:23,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 01:52:23,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 01:52:23,247 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 01:52:23,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 01:52:23,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 01:52:23,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 01:52:23,248 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 01:52:23,248 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 01:52:23,248 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 01:52:23,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 01:52:23,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 01:52:23,249 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 01:52:23,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 01:52:23,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 01:52:23,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 01:52:23,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 01:52:23,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 01:52:23,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 01:52:23,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 01:52:23,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 01:52:23,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 01:52:23,252 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 01:52:23,253 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL [2022-11-18 01:52:23,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-11-18 01:52:23,253 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2022-11-18 01:52:23,254 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2022-11-18 01:52:23,254 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_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd91eb07499c204f7750c4a87fd11eb7780a100da5928fd001cd5e1a53feff12 [2022-11-18 01:52:23,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 01:52:23,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 01:52:23,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 01:52:23,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 01:52:23,627 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 01:52:23,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/../../sv-benchmarks/c/pthread-wmm/safe020_power.i [2022-11-18 01:52:23,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/data/d0a493778/e6ea1ccad5324606a38aae7c20d22ac3/FLAG389d1b248 [2022-11-18 01:52:24,353 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 01:52:24,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/sv-benchmarks/c/pthread-wmm/safe020_power.i [2022-11-18 01:52:24,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/data/d0a493778/e6ea1ccad5324606a38aae7c20d22ac3/FLAG389d1b248 [2022-11-18 01:52:24,645 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/data/d0a493778/e6ea1ccad5324606a38aae7c20d22ac3 [2022-11-18 01:52:24,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 01:52:24,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 01:52:24,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 01:52:24,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 01:52:24,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 01:52:24,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:52:24" (1/1) ... [2022-11-18 01:52:24,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786b68a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:24, skipping insertion in model container [2022-11-18 01:52:24,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:52:24" (1/1) ... [2022-11-18 01:52:24,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 01:52:24,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 01:52:24,938 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/sv-benchmarks/c/pthread-wmm/safe020_power.i[990,1003] [2022-11-18 01:52:25,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 01:52:25,161 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 01:52:25,181 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/sv-benchmarks/c/pthread-wmm/safe020_power.i[990,1003] [2022-11-18 01:52:25,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 01:52:25,272 INFO L208 MainTranslator]: Completed translation [2022-11-18 01:52:25,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25 WrapperNode [2022-11-18 01:52:25,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 01:52:25,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 01:52:25,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 01:52:25,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 01:52:25,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,326 INFO L138 Inliner]: procedures = 176, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 176 [2022-11-18 01:52:25,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 01:52:25,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 01:52:25,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 01:52:25,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 01:52:25,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,360 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 01:52:25,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 01:52:25,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 01:52:25,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 01:52:25,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (1/1) ... [2022-11-18 01:52:25,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 01:52:25,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/z3 [2022-11-18 01:52:25,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 01:52:25,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 01:52:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 01:52:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 01:52:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 01:52:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 01:52:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 01:52:25,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 01:52:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-18 01:52:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-18 01:52:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-18 01:52:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-18 01:52:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-18 01:52:25,475 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-18 01:52:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 01:52:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 01:52:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 01:52:25,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 01:52:25,477 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 01:52:25,733 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 01:52:25,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 01:52:26,349 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 01:52:27,117 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 01:52:27,118 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 01:52:27,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:52:27 BoogieIcfgContainer [2022-11-18 01:52:27,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 01:52:27,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 01:52:27,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 01:52:27,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 01:52:27,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:52:24" (1/3) ... [2022-11-18 01:52:27,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f36647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:52:27, skipping insertion in model container [2022-11-18 01:52:27,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:52:25" (2/3) ... [2022-11-18 01:52:27,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f36647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:52:27, skipping insertion in model container [2022-11-18 01:52:27,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:52:27" (3/3) ... [2022-11-18 01:52:27,132 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_power.i [2022-11-18 01:52:27,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 01:52:27,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2022-11-18 01:52:27,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 01:52:27,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 01:52:27,374 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 01:52:27,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-18 01:52:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/z3 [2022-11-18 01:52:27,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-18 01:52:27,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_195086a2-731b-4cc5-bdde-4b7631c1d992/bin/ugemcutter-AnMVkTqH3k/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-11-18 01:52:27,449 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-18 01:52:27,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == P2Thread1of1ForFork1 ======== [2022-11-18 01:52:27,474 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=PARTIAL_ORDER_FA, 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;@30b51626, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 01:52:27,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-18 01:52:34,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 01:52:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 01:52:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1935855599, now seen corresponding path program 1 times [2022-11-18 01:52:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 01:52:34,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521964895] [2022-11-18 01:52:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 01:52:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 01:52:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 01:52:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 01:52:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 01:52:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521964895] [2022-11-18 01:52:35,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521964895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 01:52:35,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 01:52:35,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 01:52:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546074282] [2022-11-18 01:52:35,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 01:52:35,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 01:52:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 01:52:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 01:52:35,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 01:52:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:52:35,248 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-18 01:52:35,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 01:52:35,249 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:52:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:52:44,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 01:52:44,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 01:52:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 01:52:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 258369037, now seen corresponding path program 1 times [2022-11-18 01:52:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 01:52:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640876481] [2022-11-18 01:52:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 01:52:44,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 01:52:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 01:52:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 01:52:44,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 01:52:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640876481] [2022-11-18 01:52:44,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640876481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 01:52:44,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 01:52:44,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 01:52:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719552540] [2022-11-18 01:52:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 01:52:44,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 01:52:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 01:52:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 01:52:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 01:52:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:52:44,875 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-18 01:52:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 01:52:44,875 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:52:44,875 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:52:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:52:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:52:45,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 01:52:45,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 01:52:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 01:52:45,211 INFO L85 PathProgramCache]: Analyzing trace with hash -134657973, now seen corresponding path program 1 times [2022-11-18 01:52:45,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 01:52:45,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550356307] [2022-11-18 01:52:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 01:52:45,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 01:52:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 01:52:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 01:52:45,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 01:52:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550356307] [2022-11-18 01:52:45,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550356307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 01:52:45,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 01:52:45,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 01:52:45,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761153909] [2022-11-18 01:52:45,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 01:52:45,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 01:52:45,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 01:52:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 01:52:45,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 01:52:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:52:45,398 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-18 01:52:45,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 01:52:45,399 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:52:45,399 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:52:45,399 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:53:34,053 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 466 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 01:54:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:54:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:54:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 01:54:28,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 01:54:28,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 01:54:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 01:54:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -739995702, now seen corresponding path program 1 times [2022-11-18 01:54:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 01:54:28,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941776014] [2022-11-18 01:54:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 01:54:28,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 01:54:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 01:54:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 01:54:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 01:54:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941776014] [2022-11-18 01:54:29,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941776014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 01:54:29,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 01:54:29,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 01:54:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154895600] [2022-11-18 01:54:29,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 01:54:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 01:54:29,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 01:54:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 01:54:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 01:54:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 01:54:29,423 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-18 01:54:29,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 01:54:29,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:54:29,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-18 01:54:29,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2022-11-18 01:54:29,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.