./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 --- 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-4e7fbc6 [2022-11-23 15:21:41,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:21:41,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:21:41,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:21:41,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:21:41,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:21:41,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:21:41,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:21:41,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:21:41,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:21:41,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:21:41,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:21:41,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:21:41,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:21:41,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:21:41,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:21:41,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:21:41,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:21:41,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:21:41,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:21:41,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:21:41,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:21:41,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:21:41,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:21:41,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:21:41,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:21:41,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:21:41,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:21:41,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:21:41,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:21:41,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:21:41,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:21:41,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:21:41,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:21:41,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:21:41,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:21:41,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:21:41,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:21:41,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:21:41,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:21:41,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:21:41,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:21:41,810 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:21:41,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:21:41,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:21:41,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:21:41,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:21:41,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:21:41,812 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:21:41,812 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:21:41,812 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:21:41,812 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:21:41,813 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:21:41,813 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:21:41,813 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:21:41,813 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:21:41,814 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:21:41,814 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:21:41,814 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:21:41,814 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:21:41,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:21:41,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:21:41,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:21:41,816 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:21:41,816 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:21:41,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:21:41,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:21:41,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:21:41,817 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:21:41,817 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:21:41,817 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:21:41,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:21:41,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:21:41,818 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:21:41,818 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:21:41,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:21:41,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:21:41,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:41,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:21:41,820 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:21:41,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:21:41,820 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:21:41,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:21:41,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:21:41,821 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_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 [2022-11-23 15:21:42,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:21:42,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:21:42,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:21:42,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:21:42,179 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:21:42,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2022-11-23 15:21:45,154 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:21:45,433 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:21:45,434 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/sv-benchmarks/c/memsafety/lockfree-3.2.i [2022-11-23 15:21:45,446 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data/ee7a284dc/86dc7f55f0aa49cea0def8f1e1e0680a/FLAGf90189093 [2022-11-23 15:21:45,466 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data/ee7a284dc/86dc7f55f0aa49cea0def8f1e1e0680a [2022-11-23 15:21:45,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:21:45,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:21:45,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:45,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:21:45,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:21:45,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:45" (1/1) ... [2022-11-23 15:21:45,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154ef9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:45, skipping insertion in model container [2022-11-23 15:21:45,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:45" (1/1) ... [2022-11-23 15:21:45,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:21:45,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:21:45,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:45,966 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:21:46,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:46,063 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:21:46,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46 WrapperNode [2022-11-23 15:21:46,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:46,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:46,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:21:46,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:21:46,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,107 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-11-23 15:21:46,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:46,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:21:46,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:21:46,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:21:46,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,144 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:21:46,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:21:46,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:21:46,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:21:46,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (1/1) ... [2022-11-23 15:21:46,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:46,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:21:46,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:21:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:21:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:21:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:21:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:21:46,344 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:21:46,346 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:21:46,774 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:21:46,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:21:46,889 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:21:46,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:46 BoogieIcfgContainer [2022-11-23 15:21:46,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:21:46,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:21:46,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:21:46,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:21:46,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:45" (1/3) ... [2022-11-23 15:21:46,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a2b03e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:46, skipping insertion in model container [2022-11-23 15:21:46,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:46" (2/3) ... [2022-11-23 15:21:46,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a2b03e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:46, skipping insertion in model container [2022-11-23 15:21:46,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:46" (3/3) ... [2022-11-23 15:21:46,909 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2022-11-23 15:21:46,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:21:46,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-23 15:21:46,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:21:47,003 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;@1740f0da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:21:47,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-23 15:21:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:21:47,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:47,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:21:47,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 5940810, now seen corresponding path program 1 times [2022-11-23 15:21:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:47,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862454772] [2022-11-23 15:21:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:47,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862454772] [2022-11-23 15:21:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862454772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:47,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:47,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064010106] [2022-11-23 15:21:47,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:47,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:21:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:21:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:21:47,290 INFO L87 Difference]: Start difference. First operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 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, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:47,354 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-11-23 15:21:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:21:47,359 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-23 15:21:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:47,373 INFO L225 Difference]: With dead ends: 49 [2022-11-23 15:21:47,374 INFO L226 Difference]: Without dead ends: 48 [2022-11-23 15:21:47,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:21:47,384 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:47,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-23 15:21:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-23 15:21:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 2.107142857142857) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-11-23 15:21:47,435 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 4 [2022-11-23 15:21:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:47,435 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-11-23 15:21:47,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-11-23 15:21:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:21:47,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:47,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:21:47,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:21:47,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash 185350861, now seen corresponding path program 1 times [2022-11-23 15:21:47,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:47,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077009539] [2022-11-23 15:21:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:47,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077009539] [2022-11-23 15:21:47,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077009539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:47,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:47,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:21:47,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313852053] [2022-11-23 15:21:47,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:47,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:47,527 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:47,617 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-11-23 15:21:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:21:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:47,619 INFO L225 Difference]: With dead ends: 88 [2022-11-23 15:21:47,619 INFO L226 Difference]: Without dead ends: 87 [2022-11-23 15:21:47,620 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 [2022-11-23 15:21:47,621 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:47,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-23 15:21:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2022-11-23 15:21:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 67 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2022-11-23 15:21:47,631 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 5 [2022-11-23 15:21:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:47,631 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2022-11-23 15:21:47,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2022-11-23 15:21:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:21:47,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:47,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:21:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:21:47,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash 185349669, now seen corresponding path program 1 times [2022-11-23 15:21:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:47,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563665850] [2022-11-23 15:21:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:47,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563665850] [2022-11-23 15:21:47,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563665850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:47,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:47,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:47,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100355860] [2022-11-23 15:21:47,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:47,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:47,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:47,744 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:47,808 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2022-11-23 15:21:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:21:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:47,810 INFO L225 Difference]: With dead ends: 124 [2022-11-23 15:21:47,810 INFO L226 Difference]: Without dead ends: 123 [2022-11-23 15:21:47,810 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 [2022-11-23 15:21:47,811 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:47,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-23 15:21:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-11-23 15:21:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 104 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 174 transitions. [2022-11-23 15:21:47,822 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 174 transitions. Word has length 5 [2022-11-23 15:21:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:47,822 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 174 transitions. [2022-11-23 15:21:47,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 174 transitions. [2022-11-23 15:21:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:21:47,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:47,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:21:47,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:21:47,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1450814034, now seen corresponding path program 1 times [2022-11-23 15:21:47,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:47,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820760788] [2022-11-23 15:21:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:47,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:47,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:47,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820760788] [2022-11-23 15:21:47,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820760788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:47,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:47,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238304165] [2022-11-23 15:21:47,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:47,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:47,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:47,951 INFO L87 Difference]: Start difference. First operand 105 states and 174 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) [2022-11-23 15:21:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:48,079 INFO L93 Difference]: Finished difference Result 158 states and 247 transitions. [2022-11-23 15:21:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:48,079 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 [2022-11-23 15:21:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:48,085 INFO L225 Difference]: With dead ends: 158 [2022-11-23 15:21:48,085 INFO L226 Difference]: Without dead ends: 158 [2022-11-23 15:21:48,086 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 [2022-11-23 15:21:48,093 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 48 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:48,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-23 15:21:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2022-11-23 15:21:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 138 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 235 transitions. [2022-11-23 15:21:48,116 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 235 transitions. Word has length 6 [2022-11-23 15:21:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:48,116 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 235 transitions. [2022-11-23 15:21:48,117 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) [2022-11-23 15:21:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 235 transitions. [2022-11-23 15:21:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:21:48,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:48,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:21:48,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:21:48,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1450814035, now seen corresponding path program 1 times [2022-11-23 15:21:48,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:48,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622357022] [2022-11-23 15:21:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:48,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:48,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622357022] [2022-11-23 15:21:48,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622357022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:48,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:48,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235984948] [2022-11-23 15:21:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:48,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:48,269 INFO L87 Difference]: Start difference. First operand 139 states and 235 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) [2022-11-23 15:21:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:48,347 INFO L93 Difference]: Finished difference Result 153 states and 238 transitions. [2022-11-23 15:21:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:48,348 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 [2022-11-23 15:21:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:48,348 INFO L225 Difference]: With dead ends: 153 [2022-11-23 15:21:48,349 INFO L226 Difference]: Without dead ends: 153 [2022-11-23 15:21:48,349 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 [2022-11-23 15:21:48,350 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:48,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-23 15:21:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-11-23 15:21:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.8760330578512396) internal successors, (227), 136 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 227 transitions. [2022-11-23 15:21:48,361 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 227 transitions. Word has length 6 [2022-11-23 15:21:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:48,361 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 227 transitions. [2022-11-23 15:21:48,361 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) [2022-11-23 15:21:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 227 transitions. [2022-11-23 15:21:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:21:48,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:48,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:48,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:21:48,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2025570098, now seen corresponding path program 1 times [2022-11-23 15:21:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429595757] [2022-11-23 15:21:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:48,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:48,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429595757] [2022-11-23 15:21:48,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429595757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:48,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:48,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:21:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281482439] [2022-11-23 15:21:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:48,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:21:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:21:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:48,428 INFO L87 Difference]: Start difference. First operand 137 states and 227 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:48,538 INFO L93 Difference]: Finished difference Result 276 states and 414 transitions. [2022-11-23 15:21:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:21:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:21:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:48,540 INFO L225 Difference]: With dead ends: 276 [2022-11-23 15:21:48,540 INFO L226 Difference]: Without dead ends: 276 [2022-11-23 15:21:48,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:21:48,541 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 114 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:48,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 296 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-23 15:21:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 167. [2022-11-23 15:21:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 151 states have (on average 1.8543046357615893) internal successors, (280), 166 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 280 transitions. [2022-11-23 15:21:48,559 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 280 transitions. Word has length 7 [2022-11-23 15:21:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:48,560 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 280 transitions. [2022-11-23 15:21:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 280 transitions. [2022-11-23 15:21:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:21:48,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:48,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:48,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:21:48,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:48,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1580480621, now seen corresponding path program 1 times [2022-11-23 15:21:48,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:48,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590232598] [2022-11-23 15:21:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:48,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:48,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590232598] [2022-11-23 15:21:48,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590232598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:48,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:48,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:48,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834891300] [2022-11-23 15:21:48,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:48,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:48,626 INFO L87 Difference]: Start difference. First operand 167 states and 280 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:48,693 INFO L93 Difference]: Finished difference Result 385 states and 587 transitions. [2022-11-23 15:21:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:21:48,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-23 15:21:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:48,695 INFO L225 Difference]: With dead ends: 385 [2022-11-23 15:21:48,696 INFO L226 Difference]: Without dead ends: 385 [2022-11-23 15:21:48,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:48,697 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 86 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:48,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-23 15:21:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 257. [2022-11-23 15:21:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 241 states have (on average 1.7468879668049793) internal successors, (421), 256 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 421 transitions. [2022-11-23 15:21:48,740 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 421 transitions. Word has length 8 [2022-11-23 15:21:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:48,740 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 421 transitions. [2022-11-23 15:21:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 421 transitions. [2022-11-23 15:21:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:21:48,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:48,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:48,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:21:48,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1408785848, now seen corresponding path program 1 times [2022-11-23 15:21:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:48,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352301140] [2022-11-23 15:21:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:48,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:21:48,777 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:21:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:21:48,834 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:21:48,834 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:21:48,835 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-23 15:21:48,838 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-23 15:21:48,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-23 15:21:48,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-23 15:21:48,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-23 15:21:48,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-23 15:21:48,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-23 15:21:48,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-23 15:21:48,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-23 15:21:48,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-23 15:21:48,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-23 15:21:48,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 20 remaining) [2022-11-23 15:21:48,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2022-11-23 15:21:48,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2022-11-23 15:21:48,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2022-11-23 15:21:48,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2022-11-23 15:21:48,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2022-11-23 15:21:48,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-23 15:21:48,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-23 15:21:48,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-23 15:21:48,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:21:48,856 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:48,861 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:21:48,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:21:48 BoogieIcfgContainer [2022-11-23 15:21:48,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:21:48,904 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:21:48,904 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:21:48,904 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:21:48,905 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:46" (3/4) ... [2022-11-23 15:21:48,908 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 15:21:48,908 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:21:48,909 INFO L158 Benchmark]: Toolchain (without parser) took 3433.31ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 136.2MB in the beginning and 158.7MB in the end (delta: -22.4MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2022-11-23 15:21:48,909 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 125.8MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:21:48,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 584.37ms. Allocated memory is still 167.8MB. Free memory was 135.5MB in the beginning and 131.3MB in the end (delta: 4.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:21:48,910 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.59ms. Allocated memory is still 167.8MB. Free memory was 131.3MB in the beginning and 129.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:21:48,910 INFO L158 Benchmark]: Boogie Preprocessor took 50.39ms. Allocated memory is still 167.8MB. Free memory was 129.2MB in the beginning and 127.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:21:48,910 INFO L158 Benchmark]: RCFGBuilder took 732.55ms. Allocated memory is still 167.8MB. Free memory was 127.9MB in the beginning and 104.1MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-23 15:21:48,911 INFO L158 Benchmark]: TraceAbstraction took 2009.19ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 103.3MB in the beginning and 158.7MB in the end (delta: -55.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:21:48,911 INFO L158 Benchmark]: Witness Printer took 4.55ms. Allocated memory is still 201.3MB. Free memory is still 158.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:21:48,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 125.8MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 584.37ms. Allocated memory is still 167.8MB. Free memory was 135.5MB in the beginning and 131.3MB in the end (delta: 4.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.59ms. Allocated memory is still 167.8MB. Free memory was 131.3MB in the beginning and 129.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.39ms. Allocated memory is still 167.8MB. Free memory was 129.2MB in the beginning and 127.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 732.55ms. Allocated memory is still 167.8MB. Free memory was 127.9MB in the beginning and 104.1MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 2009.19ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 103.3MB in the beginning and 158.7MB in the end (delta: -55.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.55ms. Allocated memory is still 201.3MB. Free memory is still 158.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 49 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 386 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 386 mSDsluCounter, 853 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 400 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 355 IncrementalHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 453 mSDtfsCounter, 355 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=257occurred in iteration=7, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 309 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 87 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-23 15:21:48,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 --- 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-4e7fbc6 [2022-11-23 15:21:51,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:21:51,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:21:51,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:21:51,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:21:51,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:21:51,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:21:51,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:21:51,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:21:51,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:21:51,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:21:51,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:21:51,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:21:51,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:21:51,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:21:51,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:21:51,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:21:51,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:21:51,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:21:51,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:21:51,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:21:51,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:21:51,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:21:51,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:21:51,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:21:51,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:21:51,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:21:51,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:21:51,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:21:51,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:21:51,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:21:51,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:21:51,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:21:51,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:21:51,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:21:51,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:21:51,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:21:51,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:21:51,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:21:51,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:21:51,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:21:51,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 15:21:51,692 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:21:51,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:21:51,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:21:51,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:21:51,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:21:51,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:21:51,695 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:21:51,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:21:51,696 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:21:51,696 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:21:51,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:21:51,698 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:21:51,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:21:51,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:21:51,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:21:51,700 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:21:51,700 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:21:51,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:21:51,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:21:51,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:21:51,701 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:21:51,701 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:21:51,701 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:21:51,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:21:51,702 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:21:51,702 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 15:21:51,703 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 15:21:51,703 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:21:51,703 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:21:51,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:21:51,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 15:21:51,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:21:51,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:51,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:21:51,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:21:51,706 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 15:21:51,706 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 15:21:51,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:21:51,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 15:21:51,707 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 [2022-11-23 15:21:52,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:21:52,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:21:52,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:21:52,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:21:52,102 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:21:52,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2022-11-23 15:21:55,173 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:21:55,399 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:21:55,399 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/sv-benchmarks/c/memsafety/lockfree-3.2.i [2022-11-23 15:21:55,414 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data/f9f3f5b31/67ff9fbe20c348beab045bcedc064cb5/FLAG16441f0da [2022-11-23 15:21:55,436 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/data/f9f3f5b31/67ff9fbe20c348beab045bcedc064cb5 [2022-11-23 15:21:55,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:21:55,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:21:55,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:55,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:21:55,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:21:55,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec8162d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55, skipping insertion in model container [2022-11-23 15:21:55,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:21:55,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:21:55,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:55,804 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:21:55,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:55,894 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:21:55,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55 WrapperNode [2022-11-23 15:21:55,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:55,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:55,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:21:55,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:21:55,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,941 INFO L138 Inliner]: procedures = 128, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 119 [2022-11-23 15:21:55,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:55,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:21:55,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:21:55,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:21:55,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,971 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:21:55,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:21:55,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:21:55,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:21:55,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (1/1) ... [2022-11-23 15:21:55,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:56,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:56,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:21:56,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:21:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 15:21:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:21:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:21:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:21:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:21:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:21:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 15:21:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 15:21:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:21:56,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:21:56,297 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:21:56,299 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:21:56,771 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:21:56,778 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:21:56,781 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:21:56,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:56 BoogieIcfgContainer [2022-11-23 15:21:56,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:21:56,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:21:56,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:21:56,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:21:56,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:55" (1/3) ... [2022-11-23 15:21:56,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fac3ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:56, skipping insertion in model container [2022-11-23 15:21:56,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:55" (2/3) ... [2022-11-23 15:21:56,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fac3ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:56, skipping insertion in model container [2022-11-23 15:21:56,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:56" (3/3) ... [2022-11-23 15:21:56,800 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2022-11-23 15:21:56,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:21:56,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-23 15:21:56,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:21:56,894 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;@3b98df95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:21:56,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-23 15:21:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:21:56,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:56,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:21:56,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash 28701640, now seen corresponding path program 1 times [2022-11-23 15:21:56,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:21:56,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361686774] [2022-11-23 15:21:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:56,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:21:56,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:21:56,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 15:21:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:21:57,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:57,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:57,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:21:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361686774] [2022-11-23 15:21:57,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361686774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:57,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:57,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166110416] [2022-11-23 15:21:57,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:57,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:57,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:21:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:57,230 INFO L87 Difference]: Start difference. First operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:57,348 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2022-11-23 15:21:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:21:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:57,361 INFO L225 Difference]: With dead ends: 107 [2022-11-23 15:21:57,361 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 15:21:57,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:57,366 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:57,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 15:21:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-11-23 15:21:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 86 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2022-11-23 15:21:57,407 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 5 [2022-11-23 15:21:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:57,408 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2022-11-23 15:21:57,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2022-11-23 15:21:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:21:57,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:57,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:21:57,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:57,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:57,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash 889749439, now seen corresponding path program 1 times [2022-11-23 15:21:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:21:57,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438485632] [2022-11-23 15:21:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:57,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:57,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:21:57,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:21:57,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 15:21:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:21:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:57,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:57,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:21:57,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438485632] [2022-11-23 15:21:57,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438485632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:57,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:57,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:57,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341206749] [2022-11-23 15:21:57,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:57,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:57,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:21:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:57,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:57,701 INFO L87 Difference]: Start difference. First operand 87 states and 129 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) [2022-11-23 15:21:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:57,856 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2022-11-23 15:21:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:57,856 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 [2022-11-23 15:21:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:57,858 INFO L225 Difference]: With dead ends: 163 [2022-11-23 15:21:57,858 INFO L226 Difference]: Without dead ends: 160 [2022-11-23 15:21:57,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:57,860 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:57,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-23 15:21:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2022-11-23 15:21:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 120 states have (on average 1.9083333333333334) internal successors, (229), 139 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 229 transitions. [2022-11-23 15:21:57,876 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 229 transitions. Word has length 6 [2022-11-23 15:21:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:57,877 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 229 transitions. [2022-11-23 15:21:57,877 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) [2022-11-23 15:21:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 229 transitions. [2022-11-23 15:21:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:21:57,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:57,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:21:57,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:58,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:58,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2022-11-23 15:21:58,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:21:58,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927377887] [2022-11-23 15:21:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:58,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:21:58,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:21:58,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 15:21:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:21:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:58,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 15:21:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:58,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:58,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:21:58,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927377887] [2022-11-23 15:21:58,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927377887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:58,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:58,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146735156] [2022-11-23 15:21:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:58,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:21:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:58,224 INFO L87 Difference]: Start difference. First operand 140 states and 229 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) [2022-11-23 15:21:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:58,452 INFO L93 Difference]: Finished difference Result 211 states and 330 transitions. [2022-11-23 15:21:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:58,453 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 [2022-11-23 15:21:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:58,455 INFO L225 Difference]: With dead ends: 211 [2022-11-23 15:21:58,455 INFO L226 Difference]: Without dead ends: 211 [2022-11-23 15:21:58,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:58,457 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 64 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:58,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 163 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:21:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-23 15:21:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2022-11-23 15:21:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 172 states have (on average 1.8372093023255813) internal successors, (316), 189 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 316 transitions. [2022-11-23 15:21:58,484 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 316 transitions. Word has length 6 [2022-11-23 15:21:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:58,485 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 316 transitions. [2022-11-23 15:21:58,485 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) [2022-11-23 15:21:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 316 transitions. [2022-11-23 15:21:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:21:58,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:58,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:21:58,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:58,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:58,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2022-11-23 15:21:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:21:58,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305969328] [2022-11-23 15:21:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:58,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:21:58,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:21:58,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 15:21:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:21:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:58,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:21:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:58,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:58,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:21:58,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305969328] [2022-11-23 15:21:58,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305969328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:58,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:58,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435165321] [2022-11-23 15:21:58,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:58,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:21:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:58,825 INFO L87 Difference]: Start difference. First operand 190 states and 316 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) [2022-11-23 15:21:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:58,996 INFO L93 Difference]: Finished difference Result 206 states and 321 transitions. [2022-11-23 15:21:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:58,997 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 [2022-11-23 15:21:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:58,998 INFO L225 Difference]: With dead ends: 206 [2022-11-23 15:21:58,998 INFO L226 Difference]: Without dead ends: 206 [2022-11-23 15:21:58,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:59,000 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:59,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 169 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:21:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-23 15:21:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2022-11-23 15:21:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 172 states have (on average 1.7906976744186047) internal successors, (308), 187 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 308 transitions. [2022-11-23 15:21:59,013 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 308 transitions. Word has length 6 [2022-11-23 15:21:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:59,013 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 308 transitions. [2022-11-23 15:21:59,013 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) [2022-11-23 15:21:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 308 transitions. [2022-11-23 15:21:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:21:59,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:59,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:59,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:59,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2022-11-23 15:21:59,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:21:59,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028150776] [2022-11-23 15:21:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:59,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:59,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:21:59,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:21:59,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 15:21:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:21:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:59,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:59,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:21:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028150776] [2022-11-23 15:21:59,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028150776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:59,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:59,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:59,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356079526] [2022-11-23 15:21:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:21:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:59,336 INFO L87 Difference]: Start difference. First operand 188 states and 308 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2022-11-23 15:21:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:59,385 INFO L93 Difference]: Finished difference Result 240 states and 333 transitions. [2022-11-23 15:21:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:21:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:21:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:59,387 INFO L225 Difference]: With dead ends: 240 [2022-11-23 15:21:59,387 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 15:21:59,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:59,388 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 101 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:59,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 268 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 15:21:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 144. [2022-11-23 15:21:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 143 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 229 transitions. [2022-11-23 15:21:59,399 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 229 transitions. Word has length 7 [2022-11-23 15:21:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:59,399 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 229 transitions. [2022-11-23 15:21:59,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2022-11-23 15:21:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 229 transitions. [2022-11-23 15:21:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:21:59,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:59,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:59,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:59,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:21:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 347531241, now seen corresponding path program 1 times [2022-11-23 15:21:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:21:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255947753] [2022-11-23 15:21:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:59,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:21:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:21:59,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:21:59,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 15:21:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:21:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:59,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:59,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:21:59,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255947753] [2022-11-23 15:21:59,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255947753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:59,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:59,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021940028] [2022-11-23 15:21:59,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:21:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:59,719 INFO L87 Difference]: Start difference. First operand 144 states and 229 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:59,775 INFO L93 Difference]: Finished difference Result 283 states and 430 transitions. [2022-11-23 15:21:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:21:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-23 15:21:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:59,778 INFO L225 Difference]: With dead ends: 283 [2022-11-23 15:21:59,778 INFO L226 Difference]: Without dead ends: 283 [2022-11-23 15:21:59,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:59,782 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 103 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:59,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 196 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-23 15:21:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 198. [2022-11-23 15:21:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.6559139784946237) internal successors, (308), 197 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2022-11-23 15:21:59,807 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 8 [2022-11-23 15:21:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:59,807 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2022-11-23 15:21:59,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2022-11-23 15:21:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:21:59,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:59,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:59,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:00,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:22:00,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:22:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:00,021 INFO L85 PathProgramCache]: Analyzing trace with hash -527615340, now seen corresponding path program 1 times [2022-11-23 15:22:00,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:22:00,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656277195] [2022-11-23 15:22:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:00,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:22:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:22:00,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:22:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 15:22:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:22:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:00,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:00,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:22:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656277195] [2022-11-23 15:22:00,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656277195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:00,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819379220] [2022-11-23 15:22:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:00,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:22:00,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:22:00,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:22:00,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 15:22:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:00,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:22:00,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:00,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:00,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819379220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:00,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893097893] [2022-11-23 15:22:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:00,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:00,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:00,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:22:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:00,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:22:00,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:00,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:00,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893097893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:00,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:22:00,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-11-23 15:22:00,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238007840] [2022-11-23 15:22:00,609 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:22:00,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:22:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:22:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:22:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:22:00,611 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:22:00,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:00,934 INFO L93 Difference]: Finished difference Result 811 states and 1238 transitions. [2022-11-23 15:22:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:22:00,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:22:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:00,939 INFO L225 Difference]: With dead ends: 811 [2022-11-23 15:22:00,940 INFO L226 Difference]: Without dead ends: 811 [2022-11-23 15:22:00,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:22:00,942 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 547 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:00,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 811 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:22:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-23 15:22:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 438. [2022-11-23 15:22:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 426 states have (on average 1.619718309859155) internal successors, (690), 437 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:22:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 690 transitions. [2022-11-23 15:22:00,969 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 690 transitions. Word has length 12 [2022-11-23 15:22:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:00,970 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 690 transitions. [2022-11-23 15:22:00,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:22:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 690 transitions. [2022-11-23 15:22:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:22:00,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:00,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:00,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:01,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:01,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:22:01,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 15:22:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2027186576, now seen corresponding path program 1 times [2022-11-23 15:22:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:22:01,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591926207] [2022-11-23 15:22:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:01,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:22:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:22:01,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:22:01,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 15:22:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:22:01,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:22:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:22:01,721 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-23 15:22:01,721 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:22:01,722 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-23 15:22:01,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-23 15:22:01,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-23 15:22:01,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-23 15:22:01,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-23 15:22:01,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-23 15:22:01,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-23 15:22:01,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-23 15:22:01,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-23 15:22:01,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-23 15:22:01,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-23 15:22:01,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 20 remaining) [2022-11-23 15:22:01,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2022-11-23 15:22:01,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2022-11-23 15:22:01,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2022-11-23 15:22:01,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2022-11-23 15:22:01,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2022-11-23 15:22:01,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-23 15:22:01,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-23 15:22:01,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-23 15:22:01,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:01,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:22:01,939 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:01,943 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:22:01,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:22:01 BoogieIcfgContainer [2022-11-23 15:22:01,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:22:01,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:22:01,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:22:01,969 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:22:01,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:56" (3/4) ... [2022-11-23 15:22:01,973 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 15:22:01,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:22:01,973 INFO L158 Benchmark]: Toolchain (without parser) took 6532.36ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 40.9MB in the beginning and 32.7MB in the end (delta: 8.2MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2022-11-23 15:22:01,973 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 69.2MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:22:01,974 INFO L158 Benchmark]: CACSL2BoogieTranslator took 451.12ms. Allocated memory is still 69.2MB. Free memory was 40.7MB in the beginning and 43.1MB in the end (delta: -2.4MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2022-11-23 15:22:01,974 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.84ms. Allocated memory is still 69.2MB. Free memory was 43.1MB in the beginning and 41.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:22:01,974 INFO L158 Benchmark]: Boogie Preprocessor took 34.05ms. Allocated memory is still 69.2MB. Free memory was 40.8MB in the beginning and 38.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:22:01,974 INFO L158 Benchmark]: RCFGBuilder took 809.38ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 38.9MB in the beginning and 58.6MB in the end (delta: -19.7MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. [2022-11-23 15:22:01,975 INFO L158 Benchmark]: TraceAbstraction took 5179.94ms. Allocated memory is still 90.2MB. Free memory was 57.8MB in the beginning and 32.7MB in the end (delta: 25.1MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2022-11-23 15:22:01,975 INFO L158 Benchmark]: Witness Printer took 3.89ms. Allocated memory is still 90.2MB. Free memory is still 32.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:22:01,977 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 69.2MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 451.12ms. Allocated memory is still 69.2MB. Free memory was 40.7MB in the beginning and 43.1MB in the end (delta: -2.4MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.84ms. Allocated memory is still 69.2MB. Free memory was 43.1MB in the beginning and 41.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.05ms. Allocated memory is still 69.2MB. Free memory was 40.8MB in the beginning and 38.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 809.38ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 38.9MB in the beginning and 58.6MB in the end (delta: -19.7MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5179.94ms. Allocated memory is still 90.2MB. Free memory was 57.8MB in the beginning and 32.7MB in the end (delta: 25.1MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. * Witness Printer took 3.89ms. Allocated memory is still 90.2MB. Free memory is still 32.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 62 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1003 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1003 mSDsluCounter, 1857 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1050 mSDsCounter, 80 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 282 IncrementalHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 80 mSolverCounterUnsat, 807 mSDtfsCounter, 282 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=7, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 631 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 261 SizeOfPredicates, 11 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-23 15:22:02,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff18805-4684-4cf4-a93d-6e798cb97f92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample