./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/array14_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/array14_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a0f9dc1e3a944fe0c87fb9c3f72dec5466e715e61eb5b701f6540feca3c935ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 21:11:05,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:11:05,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:11:05,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:11:05,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:11:05,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:11:05,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:11:05,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:11:05,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:11:05,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:11:05,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:11:05,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:11:05,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:11:05,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:11:05,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:11:05,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:11:05,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:11:05,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:11:05,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:11:05,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:11:05,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:11:05,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:11:05,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:11:05,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:11:05,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:11:05,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:11:05,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:11:05,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:11:05,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:11:05,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:11:05,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:11:05,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:11:05,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:11:05,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:11:05,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:11:05,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:11:05,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:11:05,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:11:05,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:11:05,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:11:05,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:11:05,117 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-18 21:11:05,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:11:05,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:11:05,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:11:05,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:11:05,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:11:05,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:11:05,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:11:05,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:11:05,149 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:11:05,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:11:05,149 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 21:11:05,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:11:05,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:11:05,150 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 21:11:05,150 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 21:11:05,150 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 21:11:05,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:11:05,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 21:11:05,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:11:05,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:11:05,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:11:05,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:11:05,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:11:05,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:11:05,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:11:05,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:11:05,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:11:05,153 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_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0f9dc1e3a944fe0c87fb9c3f72dec5466e715e61eb5b701f6540feca3c935ad [2022-11-18 21:11:05,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:11:05,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:11:05,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:11:05,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:11:05,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:11:05,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/termination-15/array14_alloca.i [2022-11-18 21:11:05,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/data/12ecb7e4c/feda86ea70fe4e05b6466b122b2e2b55/FLAGe33b9bbbe [2022-11-18 21:11:06,250 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:11:06,251 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/sv-benchmarks/c/termination-15/array14_alloca.i [2022-11-18 21:11:06,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/data/12ecb7e4c/feda86ea70fe4e05b6466b122b2e2b55/FLAGe33b9bbbe [2022-11-18 21:11:06,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/data/12ecb7e4c/feda86ea70fe4e05b6466b122b2e2b55 [2022-11-18 21:11:06,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:11:06,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:11:06,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:11:06,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:11:06,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:11:06,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:11:06" (1/1) ... [2022-11-18 21:11:06,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2650105a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:06, skipping insertion in model container [2022-11-18 21:11:06,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:11:06" (1/1) ... [2022-11-18 21:11:06,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:11:06,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:11:07,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:11:07,071 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:11:07,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:11:07,180 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:11:07,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07 WrapperNode [2022-11-18 21:11:07,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:11:07,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:11:07,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:11:07,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:11:07,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,256 INFO L138 Inliner]: procedures = 151, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2022-11-18 21:11:07,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:11:07,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:11:07,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:11:07,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:11:07,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,305 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:11:07,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:11:07,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:11:07,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:11:07,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (1/1) ... [2022-11-18 21:11:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:11:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:07,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:11:07,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:11:07,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 21:11:07,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 21:11:07,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 21:11:07,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 21:11:07,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:11:07,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:11:07,515 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:11:07,517 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:11:07,725 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:11:07,731 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:11:07,731 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 21:11:07,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:07 BoogieIcfgContainer [2022-11-18 21:11:07,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:11:07,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:11:07,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:11:07,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:11:07,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:11:06" (1/3) ... [2022-11-18 21:11:07,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4467e888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:11:07, skipping insertion in model container [2022-11-18 21:11:07,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:07" (2/3) ... [2022-11-18 21:11:07,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4467e888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:11:07, skipping insertion in model container [2022-11-18 21:11:07,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:07" (3/3) ... [2022-11-18 21:11:07,755 INFO L112 eAbstractionObserver]: Analyzing ICFG array14_alloca.i [2022-11-18 21:11:07,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:11:07,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-18 21:11:07,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:11:07,900 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;@6336f5c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:11:07,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-18 21:11:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.894736842105263) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 21:11:07,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:07,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 21:11:07,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 889508766, now seen corresponding path program 1 times [2022-11-18 21:11:07,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:07,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455246807] [2022-11-18 21:11:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:07,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455246807] [2022-11-18 21:11:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455246807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:08,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:08,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431801093] [2022-11-18 21:11:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:08,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:08,328 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.894736842105263) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 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 2.0) 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) [2022-11-18 21:11:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:08,421 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-18 21:11:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:08,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 [2022-11-18 21:11:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:08,436 INFO L225 Difference]: With dead ends: 29 [2022-11-18 21:11:08,437 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 21:11:08,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:08,444 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:08,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 21:11:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-18 21:11:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-18 21:11:08,488 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2022-11-18 21:11:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:08,489 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-18 21:11:08,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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) [2022-11-18 21:11:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-18 21:11:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:11:08,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:08,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:08,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:11:08,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2022-11-18 21:11:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:08,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918638834] [2022-11-18 21:11:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:08,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:08,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918638834] [2022-11-18 21:11:08,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918638834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:08,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:08,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:08,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99668860] [2022-11-18 21:11:08,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:08,606 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2022-11-18 21:11:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:08,640 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-18 21:11:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 [2022-11-18 21:11:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:08,642 INFO L225 Difference]: With dead ends: 23 [2022-11-18 21:11:08,642 INFO L226 Difference]: Without dead ends: 23 [2022-11-18 21:11:08,642 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 [2022-11-18 21:11:08,644 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:08,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-18 21:11:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-18 21:11:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-18 21:11:08,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2022-11-18 21:11:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:08,650 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-18 21:11:08,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2022-11-18 21:11:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-18 21:11:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:11:08,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:08,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:11:08,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2022-11-18 21:11:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:08,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251502676] [2022-11-18 21:11:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:08,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251502676] [2022-11-18 21:11:08,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251502676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:08,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:08,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:11:08,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083773311] [2022-11-18 21:11:08,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:08,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:11:08,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:11:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:11:08,961 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-18 21:11:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:09,141 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-18 21:11:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:11:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 [2022-11-18 21:11:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:09,145 INFO L225 Difference]: With dead ends: 50 [2022-11-18 21:11:09,146 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 21:11:09,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:11:09,149 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:09,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 75 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:11:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 21:11:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2022-11-18 21:11:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-18 21:11:09,165 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 7 [2022-11-18 21:11:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:09,166 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-18 21:11:09,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-18 21:11:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-18 21:11:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:11:09,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:09,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:09,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 21:11:09,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1806815564, now seen corresponding path program 1 times [2022-11-18 21:11:09,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:09,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403424090] [2022-11-18 21:11:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:09,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:09,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403424090] [2022-11-18 21:11:09,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403424090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:09,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:09,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 21:11:09,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903542577] [2022-11-18 21:11:09,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:09,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:11:09,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:09,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:11:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:11:09,505 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 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) [2022-11-18 21:11:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:09,657 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-18 21:11:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:11:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 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 [2022-11-18 21:11:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:09,663 INFO L225 Difference]: With dead ends: 38 [2022-11-18 21:11:09,663 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 21:11:09,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:11:09,668 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:09,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 21 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 21:11:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-11-18 21:11:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-18 21:11:09,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2022-11-18 21:11:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:09,675 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-18 21:11:09,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 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) [2022-11-18 21:11:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-18 21:11:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:11:09,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:09,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:09,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:11:09,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1744874990, now seen corresponding path program 1 times [2022-11-18 21:11:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:09,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713781255] [2022-11-18 21:11:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:09,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:09,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:09,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713781255] [2022-11-18 21:11:09,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713781255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:09,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041625253] [2022-11-18 21:11:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:09,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:09,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:09,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:11:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:09,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:11:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:10,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:11:10,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041625253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:10,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:10,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 21:11:10,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47334703] [2022-11-18 21:11:10,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:11:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:11:10,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:11:10,101 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:10,179 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-18 21:11:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:11:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 21:11:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:10,181 INFO L225 Difference]: With dead ends: 47 [2022-11-18 21:11:10,181 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 21:11:10,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:11:10,182 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:10,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 21:11:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-11-18 21:11:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-18 21:11:10,188 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 13 [2022-11-18 21:11:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:10,188 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-18 21:11:10,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-18 21:11:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:11:10,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:10,190 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:10,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:10,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:10,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1849027728, now seen corresponding path program 1 times [2022-11-18 21:11:10,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:10,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569048347] [2022-11-18 21:11:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:10,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569048347] [2022-11-18 21:11:10,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569048347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848566488] [2022-11-18 21:11:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:10,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:10,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:10,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:11:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:10,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:11:10,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:10,975 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 [2022-11-18 21:11:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:11,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:11,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848566488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:11,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:11:11,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-18 21:11:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623934943] [2022-11-18 21:11:11,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:11,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:11:11,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:11:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:11:11,539 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:11,920 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-18 21:11:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:11,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 21:11:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:11,921 INFO L225 Difference]: With dead ends: 37 [2022-11-18 21:11:11,921 INFO L226 Difference]: Without dead ends: 37 [2022-11-18 21:11:11,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:11:11,922 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:11,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 44 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-18 21:11:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-18 21:11:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-18 21:11:11,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2022-11-18 21:11:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:11,932 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-18 21:11:11,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-18 21:11:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:11,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:11,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:11,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:12,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 21:11:12,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1787579333, now seen corresponding path program 1 times [2022-11-18 21:11:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:12,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605110381] [2022-11-18 21:11:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:12,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605110381] [2022-11-18 21:11:12,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605110381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890296296] [2022-11-18 21:11:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:12,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:12,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:11:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 21:11:12,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:12,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:12,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-18 21:11:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:12,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890296296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:12,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:11:12,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 21:11:12,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043395593] [2022-11-18 21:11:12,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:11:12,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:12,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:11:12,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:11:12,532 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:12,692 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-11-18 21:11:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:12,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 21:11:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:12,695 INFO L225 Difference]: With dead ends: 43 [2022-11-18 21:11:12,695 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 21:11:12,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:11:12,697 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:12,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 48 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 21:11:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-18 21:11:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-18 21:11:12,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 15 [2022-11-18 21:11:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:12,709 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-18 21:11:12,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-18 21:11:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 21:11:12,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:12,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:12,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:12,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:12,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash -419617070, now seen corresponding path program 1 times [2022-11-18 21:11:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:12,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166177679] [2022-11-18 21:11:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:12,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166177679] [2022-11-18 21:11:12,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166177679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:12,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:12,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:11:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248928247] [2022-11-18 21:11:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:12,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:11:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:11:12,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:12,984 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:13,007 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-18 21:11:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:11:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 21:11:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:13,008 INFO L225 Difference]: With dead ends: 34 [2022-11-18 21:11:13,008 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 21:11:13,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:13,009 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:13,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 21:11:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-18 21:11:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-18 21:11:13,013 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2022-11-18 21:11:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:13,013 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-18 21:11:13,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-18 21:11:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 21:11:13,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:13,014 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:13,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 21:11:13,014 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash 476404122, now seen corresponding path program 1 times [2022-11-18 21:11:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461651886] [2022-11-18 21:11:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:13,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461651886] [2022-11-18 21:11:13,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461651886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:13,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301344569] [2022-11-18 21:11:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:13,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:13,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:13,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:11:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:11:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:13,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:11:13,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301344569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:13,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:13,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-18 21:11:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466841233] [2022-11-18 21:11:13,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:13,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:11:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:13,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:11:13,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:11:13,135 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:13,159 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-18 21:11:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:11:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 21:11:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:13,160 INFO L225 Difference]: With dead ends: 38 [2022-11-18 21:11:13,160 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 21:11:13,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:11:13,161 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:13,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 21:11:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-18 21:11:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-18 21:11:13,164 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2022-11-18 21:11:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:13,164 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-18 21:11:13,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-18 21:11:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 21:11:13,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:13,165 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:13,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:13,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:13,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash 476406044, now seen corresponding path program 1 times [2022-11-18 21:11:13,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:13,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654722444] [2022-11-18 21:11:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:13,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:13,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:13,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654722444] [2022-11-18 21:11:13,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654722444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:13,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787849654] [2022-11-18 21:11:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:13,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:13,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:13,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:13,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:11:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:13,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:11:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:13,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:11:13,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787849654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:13,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:13,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-18 21:11:13,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414093121] [2022-11-18 21:11:13,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:13,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:11:13,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:11:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:13,637 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:13,670 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-18 21:11:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:11:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 21:11:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:13,671 INFO L225 Difference]: With dead ends: 47 [2022-11-18 21:11:13,671 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 21:11:13,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:13,672 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:13,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 21:11:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-11-18 21:11:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-18 21:11:13,683 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 18 [2022-11-18 21:11:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:13,683 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-18 21:11:13,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-18 21:11:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 21:11:13,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:13,686 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:13,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:11:13,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -544662310, now seen corresponding path program 1 times [2022-11-18 21:11:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010133937] [2022-11-18 21:11:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:14,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:14,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010133937] [2022-11-18 21:11:14,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010133937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:14,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408304134] [2022-11-18 21:11:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:14,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:14,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:14,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:11:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:14,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 21:11:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:14,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:14,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408304134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:14,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:11:14,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-18 21:11:14,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837065373] [2022-11-18 21:11:14,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:14,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:11:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:11:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:11:14,237 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:14,575 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-11-18 21:11:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:11:14,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 18 [2022-11-18 21:11:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:14,579 INFO L225 Difference]: With dead ends: 64 [2022-11-18 21:11:14,579 INFO L226 Difference]: Without dead ends: 64 [2022-11-18 21:11:14,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:11:14,580 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:14,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 73 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-18 21:11:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-11-18 21:11:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-11-18 21:11:14,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-11-18 21:11:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-11-18 21:11:14,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-11-18 21:11:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 21:11:14,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:14,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:14,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:14,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:14,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 21:11:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1883624349, now seen corresponding path program 1 times [2022-11-18 21:11:14,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:14,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678462142] [2022-11-18 21:11:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:14,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:11:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678462142] [2022-11-18 21:11:14,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678462142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:14,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:14,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:14,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674938991] [2022-11-18 21:11:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:14,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:11:14,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:11:14,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:14,958 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:14,975 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-11-18 21:11:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:11:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-18 21:11:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:14,976 INFO L225 Difference]: With dead ends: 44 [2022-11-18 21:11:14,977 INFO L226 Difference]: Without dead ends: 0 [2022-11-18 21:11:14,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:14,978 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:14,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-18 21:11:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-18 21:11:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-18 21:11:14,980 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2022-11-18 21:11:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:14,980 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 21:11:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-18 21:11:14,981 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-18 21:11:14,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-18 21:11:14,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-18 21:11:14,985 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-18 21:11:14,985 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-18 21:11:14,985 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-18 21:11:14,986 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-18 21:11:14,986 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-18 21:11:14,986 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-18 21:11:14,986 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-18 21:11:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 21:11:14,991 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:14,994 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 21:11:14,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:11:14 BoogieIcfgContainer [2022-11-18 21:11:14,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 21:11:14,998 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 21:11:14,998 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 21:11:14,998 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 21:11:14,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:07" (3/4) ... [2022-11-18 21:11:15,003 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-18 21:11:15,014 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-18 21:11:15,015 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-18 21:11:15,015 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-18 21:11:15,015 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-18 21:11:15,057 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 21:11:15,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 21:11:15,058 INFO L158 Benchmark]: Toolchain (without parser) took 8554.21ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 99.7MB in the beginning and 84.1MB in the end (delta: 15.6MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. [2022-11-18 21:11:15,058 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 86.0MB. Free memory was 42.1MB in the beginning and 42.0MB in the end (delta: 40.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 21:11:15,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 676.16ms. Allocated memory is still 132.1MB. Free memory was 99.7MB in the beginning and 101.8MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 21:11:15,059 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.35ms. Allocated memory is still 132.1MB. Free memory was 101.8MB in the beginning and 100.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 21:11:15,059 INFO L158 Benchmark]: Boogie Preprocessor took 60.27ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 98.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 21:11:15,060 INFO L158 Benchmark]: RCFGBuilder took 413.26ms. Allocated memory is still 132.1MB. Free memory was 98.9MB in the beginning and 87.0MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 21:11:15,060 INFO L158 Benchmark]: TraceAbstraction took 7262.10ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 86.3MB in the beginning and 86.2MB in the end (delta: 135.8kB). Peak memory consumption was 28.8MB. Max. memory is 16.1GB. [2022-11-18 21:11:15,061 INFO L158 Benchmark]: Witness Printer took 59.06ms. Allocated memory is still 159.4MB. Free memory was 86.2MB in the beginning and 84.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 21:11:15,063 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 86.0MB. Free memory was 42.1MB in the beginning and 42.0MB in the end (delta: 40.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 676.16ms. Allocated memory is still 132.1MB. Free memory was 99.7MB in the beginning and 101.8MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.35ms. Allocated memory is still 132.1MB. Free memory was 101.8MB in the beginning and 100.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 60.27ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 98.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 413.26ms. Allocated memory is still 132.1MB. Free memory was 98.9MB in the beginning and 87.0MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7262.10ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 86.3MB in the beginning and 86.2MB in the end (delta: 135.8kB). Peak memory consumption was 28.8MB. Max. memory is 16.1GB. * Witness Printer took 59.06ms. Allocated memory is still 159.4MB. Free memory was 86.2MB in the beginning and 84.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 364]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 603 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 603 mSDsluCounter, 493 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 299 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 540 IncrementalHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 194 mSDtfsCounter, 540 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=11, InterpolantAutomatonStates: 75, 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, 12 MinimizatonAttempts, 83 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 252 NumberOfCodeBlocks, 252 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 277 ConstructedInterpolants, 0 QuantifiedInterpolants, 2057 SizeOfPredicates, 15 NumberOfNonLiveVariables, 391 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 21 InterpolantComputations, 9 PerfectInterpolantSequences, 22/37 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 - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-18 21:11:15,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e47b7e1-59d9-43e7-be12-dd65d9c8d797/bin/uautomizer-TMbwUNV5ro/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: TRUE