./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcspn_malloc.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_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/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_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcspn_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/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_0017d11e-9acf-429b-a21b-b08bcbbefb7b/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 dea536aba24bbbd149deffc3b8406a97f6fac760a5b2f50471455440f523d7fc --- 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 18:46:53,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:46:53,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:46:53,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:46:53,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:46:53,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:46:53,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:46:53,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:46:53,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:46:53,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:46:53,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:46:53,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:46:53,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:46:53,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:46:53,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:46:53,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:46:53,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:46:53,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:46:53,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:46:53,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:46:53,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:46:53,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:46:53,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:46:53,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:46:53,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:46:53,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:46:53,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:46:53,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:46:53,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:46:53,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:46:53,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:46:53,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:46:53,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:46:53,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:46:53,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:46:53,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:46:53,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:46:53,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:46:53,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:46:53,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:46:53,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:46:53,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-18 18:46:53,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:46:53,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:46:53,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:46:53,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:46:53,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:46:53,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:46:53,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:46:53,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:46:53,295 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:46:53,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:46:53,297 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:46:53,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:46:53,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:46:53,297 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:46:53,298 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:46:53,298 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:46:53,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:46:53,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:46:53,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:46:53,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:46:53,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:46:53,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:46:53,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:53,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:46:53,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:46:53,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:46:53,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:46:53,301 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_0017d11e-9acf-429b-a21b-b08bcbbefb7b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea536aba24bbbd149deffc3b8406a97f6fac760a5b2f50471455440f523d7fc [2022-11-18 18:46:53,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:46:53,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:46:53,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:46:53,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:46:53,729 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:46:53,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/termination-15/cstrcspn_malloc.i [2022-11-18 18:46:53,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/data/4bf44107d/762a8eb86a0542848f3fa68e697ca6e4/FLAG99ca341a6 [2022-11-18 18:46:54,583 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:46:54,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/sv-benchmarks/c/termination-15/cstrcspn_malloc.i [2022-11-18 18:46:54,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/data/4bf44107d/762a8eb86a0542848f3fa68e697ca6e4/FLAG99ca341a6 [2022-11-18 18:46:54,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/data/4bf44107d/762a8eb86a0542848f3fa68e697ca6e4 [2022-11-18 18:46:54,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:46:54,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:46:54,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:54,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:46:54,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:46:54,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:54" (1/1) ... [2022-11-18 18:46:54,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f80c710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:54, skipping insertion in model container [2022-11-18 18:46:54,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:54" (1/1) ... [2022-11-18 18:46:54,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:46:54,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:46:55,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:55,351 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:46:55,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:55,490 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:46:55,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55 WrapperNode [2022-11-18 18:46:55,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:55,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:55,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:46:55,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:46:55,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,589 INFO L138 Inliner]: procedures = 152, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-18 18:46:55,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:55,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:46:55,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:46:55,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:46:55,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,643 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:46:55,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:46:55,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:46:55,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:46:55,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (1/1) ... [2022-11-18 18:46:55,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:55,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:46:55,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:46:55,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:46:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:46:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:46:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:46:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:46:55,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:46:55,905 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:46:55,908 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:46:56,259 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:46:56,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:46:56,266 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:46:56,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:56 BoogieIcfgContainer [2022-11-18 18:46:56,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:46:56,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:46:56,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:46:56,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:46:56,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:46:54" (1/3) ... [2022-11-18 18:46:56,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6fda74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:56, skipping insertion in model container [2022-11-18 18:46:56,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:55" (2/3) ... [2022-11-18 18:46:56,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6fda74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:56, skipping insertion in model container [2022-11-18 18:46:56,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:56" (3/3) ... [2022-11-18 18:46:56,292 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcspn_malloc.i [2022-11-18 18:46:56,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:46:56,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-11-18 18:46:56,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:46:56,412 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;@6b98461b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:46:56,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-18 18:46:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 31 states have (on average 1.935483870967742) internal successors, (60), 52 states have internal predecessors, (60), 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 18:46:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:46:56,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:56,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:46:56,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-11-18 18:46:56,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:56,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557067656] [2022-11-18 18:46:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:57,171 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 18:46:57,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557067656] [2022-11-18 18:46:57,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557067656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:57,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:57,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581773595] [2022-11-18 18:46:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:57,219 INFO L87 Difference]: Start difference. First operand has 53 states, 31 states have (on average 1.935483870967742) internal successors, (60), 52 states have internal predecessors, (60), 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 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 18:46:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:57,381 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-11-18 18:46:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:57,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 18:46:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:57,394 INFO L225 Difference]: With dead ends: 99 [2022-11-18 18:46:57,394 INFO L226 Difference]: Without dead ends: 95 [2022-11-18 18:46:57,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:57,399 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 129 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:57,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-18 18:46:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2022-11-18 18:46:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.8) internal successors, (54), 48 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 18:46:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-18 18:46:57,436 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 6 [2022-11-18 18:46:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:57,437 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-18 18:46:57,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 18:46:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-18 18:46:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:46:57,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:57,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:46:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:46:57,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:57,440 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-11-18 18:46:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:57,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845548925] [2022-11-18 18:46:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:57,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:57,637 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 18:46:57,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:57,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845548925] [2022-11-18 18:46:57,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845548925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:57,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:57,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:57,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945545058] [2022-11-18 18:46:57,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:57,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:57,642 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 18:46:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:57,756 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-11-18 18:46:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 18:46:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:57,759 INFO L225 Difference]: With dead ends: 93 [2022-11-18 18:46:57,759 INFO L226 Difference]: Without dead ends: 93 [2022-11-18 18:46:57,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 18:46:57,761 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:57,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-18 18:46:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2022-11-18 18:46:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.803921568627451) internal successors, (92), 69 states have internal predecessors, (92), 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 18:46:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2022-11-18 18:46:57,772 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 6 [2022-11-18 18:46:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:57,773 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2022-11-18 18:46:57,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 18:46:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2022-11-18 18:46:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:46:57,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:57,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:46:57,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:46:57,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2022-11-18 18:46:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080992938] [2022-11-18 18:46:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:57,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:57,992 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 18:46:57,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080992938] [2022-11-18 18:46:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080992938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:57,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:57,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328757681] [2022-11-18 18:46:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:46:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:46:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:57,997 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 18:46:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:58,083 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-11-18 18:46:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 18:46:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:58,088 INFO L225 Difference]: With dead ends: 68 [2022-11-18 18:46:58,088 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 18:46:58,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:58,090 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:58,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 18:46:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2022-11-18 18:46:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 46 states have internal predecessors, (52), 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 18:46:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-11-18 18:46:58,110 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 6 [2022-11-18 18:46:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:58,111 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-11-18 18:46:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 18:46:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-11-18 18:46:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:46:58,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:58,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:58,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:46:58,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:58,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2022-11-18 18:46:58,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:58,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360841857] [2022-11-18 18:46:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:58,211 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 18:46:58,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:58,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360841857] [2022-11-18 18:46:58,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360841857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:58,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:58,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:46:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408771053] [2022-11-18 18:46:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:58,215 INFO L87 Difference]: Start difference. First operand 47 states and 52 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 18:46:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:58,267 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-18 18:46:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:58,268 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 18:46:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:58,270 INFO L225 Difference]: With dead ends: 46 [2022-11-18 18:46:58,270 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 18:46:58,271 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 18:46:58,286 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:46:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 18:46:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-18 18:46:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.7) internal successors, (51), 45 states have internal predecessors, (51), 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 18:46:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-18 18:46:58,292 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 7 [2022-11-18 18:46:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:58,292 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-18 18:46:58,292 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 18:46:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-18 18:46:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:46:58,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:58,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:46:58,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2022-11-18 18:46:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:58,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813371441] [2022-11-18 18:46:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:58,497 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 18:46:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:58,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813371441] [2022-11-18 18:46:58,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813371441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:58,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:58,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:58,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63609168] [2022-11-18 18:46:58,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:58,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:58,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:58,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:58,503 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:58,660 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-11-18 18:46:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:58,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:46:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:58,662 INFO L225 Difference]: With dead ends: 86 [2022-11-18 18:46:58,662 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 18:46:58,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 18:46:58,663 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:58,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 104 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 18:46:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2022-11-18 18:46:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.679245283018868) internal successors, (89), 68 states have internal predecessors, (89), 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 18:46:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-18 18:46:58,671 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 7 [2022-11-18 18:46:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:58,672 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-18 18:46:58,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-18 18:46:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:46:58,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:58,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:46:58,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088457, now seen corresponding path program 1 times [2022-11-18 18:46:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:58,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773320472] [2022-11-18 18:46:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:58,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:58,809 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 18:46:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773320472] [2022-11-18 18:46:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773320472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:58,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:58,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:58,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597162274] [2022-11-18 18:46:58,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:58,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:46:58,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:46:58,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:58,813 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 18:46:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:58,873 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-11-18 18:46:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 18:46:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:58,875 INFO L225 Difference]: With dead ends: 67 [2022-11-18 18:46:58,875 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 18:46:58,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:58,877 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:58,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 18:46:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2022-11-18 18:46:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 43 states have internal predecessors, (49), 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 18:46:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-11-18 18:46:58,883 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 7 [2022-11-18 18:46:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:58,883 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-11-18 18:46:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 18:46:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-11-18 18:46:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:46:58,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:58,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:58,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:46:58,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash -534039922, now seen corresponding path program 1 times [2022-11-18 18:46:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:58,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68017126] [2022-11-18 18:46:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:58,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:58,943 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 18:46:58,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68017126] [2022-11-18 18:46:58,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68017126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:58,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:58,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:58,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310423752] [2022-11-18 18:46:58,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:58,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:58,947 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 18:46:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:59,025 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-18 18:46:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-11-18 18:46:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:59,026 INFO L225 Difference]: With dead ends: 42 [2022-11-18 18:46:59,027 INFO L226 Difference]: Without dead ends: 42 [2022-11-18 18:46:59,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:59,028 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:59,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-18 18:46:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-18 18:46:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 41 states have internal predecessors, (47), 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 18:46:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-18 18:46:59,033 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 9 [2022-11-18 18:46:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:59,034 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-18 18:46:59,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 18:46:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-18 18:46:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:46:59,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:59,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:59,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:46:59,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:59,037 INFO L85 PathProgramCache]: Analyzing trace with hash -534039921, now seen corresponding path program 1 times [2022-11-18 18:46:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:59,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040328587] [2022-11-18 18:46:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:59,178 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 18:46:59,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040328587] [2022-11-18 18:46:59,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040328587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:59,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:46:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043783831] [2022-11-18 18:46:59,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:59,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:46:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:46:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:46:59,184 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 18:46:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:59,304 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-11-18 18:46:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:46:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2022-11-18 18:46:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:59,307 INFO L225 Difference]: With dead ends: 74 [2022-11-18 18:46:59,307 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 18:46:59,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:46:59,310 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 184 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:59,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 61 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 18:46:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2022-11-18 18:46:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 44 states have internal predecessors, (51), 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 18:46:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-18 18:46:59,327 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 9 [2022-11-18 18:46:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:59,327 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-18 18:46:59,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 18:46:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-18 18:46:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:46:59,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:59,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:59,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:46:59,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144940, now seen corresponding path program 1 times [2022-11-18 18:46:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218575] [2022-11-18 18:46:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:59,448 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 18:46:59,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:59,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218575] [2022-11-18 18:46:59,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:59,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:59,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:59,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153895992] [2022-11-18 18:46:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:59,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:46:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:46:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:59,453 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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 18:46:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:59,527 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-11-18 18:46:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:59,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 18:46:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:59,529 INFO L225 Difference]: With dead ends: 48 [2022-11-18 18:46:59,529 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 18:46:59,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:46:59,533 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:59,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 61 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 18:46:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-18 18:46:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 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 18:46:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-18 18:46:59,548 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 13 [2022-11-18 18:46:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:59,549 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-18 18:46:59,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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 18:46:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-18 18:46:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:46:59,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:59,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:46:59,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144939, now seen corresponding path program 1 times [2022-11-18 18:46:59,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:59,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725850394] [2022-11-18 18:46:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:59,806 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 18:46:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:59,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725850394] [2022-11-18 18:46:59,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725850394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:59,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:59,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:46:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553617041] [2022-11-18 18:46:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:46:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:46:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:46:59,810 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 18:46:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:59,971 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-11-18 18:46:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:46:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 18:46:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:59,973 INFO L225 Difference]: With dead ends: 67 [2022-11-18 18:46:59,973 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 18:46:59,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:59,974 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:59,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 18:46:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2022-11-18 18:46:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.425) internal successors, (57), 48 states have internal predecessors, (57), 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 18:46:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-18 18:46:59,981 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2022-11-18 18:46:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:59,981 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-18 18:46:59,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 18:46:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-18 18:46:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:46:59,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:59,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:59,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:46:59,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:46:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -948409995, now seen corresponding path program 1 times [2022-11-18 18:46:59,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786184118] [2022-11-18 18:46:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,037 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 18:47:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786184118] [2022-11-18 18:47:00,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786184118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:00,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:00,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:47:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599763427] [2022-11-18 18:47:00,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:00,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:00,041 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 18:47:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,053 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-18 18:47:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:00,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-11-18 18:47:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,055 INFO L225 Difference]: With dead ends: 48 [2022-11-18 18:47:00,056 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 18:47:00,056 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 18:47:00,057 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:00,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 18:47:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-18 18:47:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.4) internal successors, (56), 47 states have internal predecessors, (56), 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 18:47:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-18 18:47:00,067 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 14 [2022-11-18 18:47:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,067 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-18 18:47:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 18:47:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-18 18:47:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:47:00,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:47:00,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 950889964, now seen corresponding path program 1 times [2022-11-18 18:47:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951688070] [2022-11-18 18:47:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951688070] [2022-11-18 18:47:00,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951688070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:00,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:00,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872432353] [2022-11-18 18:47:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:00,102 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 18:47:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,112 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-18 18:47:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2022-11-18 18:47:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,114 INFO L225 Difference]: With dead ends: 50 [2022-11-18 18:47:00,114 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 18:47:00,115 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 18:47:00,116 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:00,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 18:47:00,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 18:47:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.380952380952381) internal successors, (58), 49 states have internal predecessors, (58), 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 18:47:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-18 18:47:00,126 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 17 [2022-11-18 18:47:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,126 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-18 18:47:00,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 18:47:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-18 18:47:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:47:00,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:00,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:47:00,128 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1787173696, now seen corresponding path program 1 times [2022-11-18 18:47:00,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156957901] [2022-11-18 18:47:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:00,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156957901] [2022-11-18 18:47:00,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156957901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:00,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:00,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:47:00,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959298261] [2022-11-18 18:47:00,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:00,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:00,168 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 18:47:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,181 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-11-18 18:47:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2022-11-18 18:47:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,183 INFO L225 Difference]: With dead ends: 49 [2022-11-18 18:47:00,183 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 18:47:00,183 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 18:47:00,184 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:00,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 18:47:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 18:47:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 48 states have internal predecessors, (57), 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 18:47:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-18 18:47:00,188 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 17 [2022-11-18 18:47:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,188 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-18 18:47:00,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 18:47:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-18 18:47:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 18:47:00,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:47:00,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash 432190393, now seen corresponding path program 1 times [2022-11-18 18:47:00,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872611843] [2022-11-18 18:47:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,301 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 18:47:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872611843] [2022-11-18 18:47:00,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872611843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:00,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:00,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:47:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240082742] [2022-11-18 18:47:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:47:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:47:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:47:00,305 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 5 states, 4 states have (on average 4.5) 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 18:47:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,347 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-18 18:47:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:47:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) 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 18:47:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,348 INFO L225 Difference]: With dead ends: 48 [2022-11-18 18:47:00,348 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 18:47:00,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:47:00,350 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:00,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 18:47:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-18 18:47:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 states have internal predecessors, (56), 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 18:47:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-18 18:47:00,353 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2022-11-18 18:47:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,353 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-18 18:47:00,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) 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 18:47:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-18 18:47:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 18:47:00,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,355 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 18:47:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:47:00,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1028637879, now seen corresponding path program 1 times [2022-11-18 18:47:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011548132] [2022-11-18 18:47:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,659 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 18:47:00,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011548132] [2022-11-18 18:47:00,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011548132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:00,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:00,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:47:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386607074] [2022-11-18 18:47:00,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:47:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:47:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:47:00,664 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 18:47:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,822 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-11-18 18:47:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:47:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 18:47:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,824 INFO L225 Difference]: With dead ends: 65 [2022-11-18 18:47:00,824 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 18:47:00,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:00,828 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:00,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 175 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:47:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 18:47:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-11-18 18:47:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 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 18:47:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-18 18:47:00,832 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 19 [2022-11-18 18:47:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,833 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-18 18:47:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 18:47:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-18 18:47:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 18:47:00,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,838 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 18:47:00,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 18:47:00,838 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash 513000419, now seen corresponding path program 1 times [2022-11-18 18:47:00,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077804371] [2022-11-18 18:47:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:01,220 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 18:47:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077804371] [2022-11-18 18:47:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077804371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:01,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:01,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:47:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203844128] [2022-11-18 18:47:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:01,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:47:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:47:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:47:01,223 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 18:47:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:01,346 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-18 18:47:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:47:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 18:47:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:01,347 INFO L225 Difference]: With dead ends: 54 [2022-11-18 18:47:01,347 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 18:47:01,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:47:01,348 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:01,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 76 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 18:47:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-18 18:47:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 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 18:47:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-18 18:47:01,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 19 [2022-11-18 18:47:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:01,350 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-18 18:47:01,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 18:47:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-18 18:47:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 18:47:01,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:01,351 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 18:47:01,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:47:01,352 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1677981515, now seen corresponding path program 1 times [2022-11-18 18:47:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431565373] [2022-11-18 18:47:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431565373] [2022-11-18 18:47:01,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431565373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:01,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:01,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:47:01,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980295392] [2022-11-18 18:47:01,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:01,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:47:01,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:01,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:47:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:47:01,660 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 18:47:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:01,855 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-11-18 18:47:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:47:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 18:47:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:01,856 INFO L225 Difference]: With dead ends: 58 [2022-11-18 18:47:01,856 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 18:47:01,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:47:01,858 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:01,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 124 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:47:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 18:47:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-11-18 18:47:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 55 states have internal predecessors, (63), 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 18:47:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-11-18 18:47:01,861 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2022-11-18 18:47:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:01,861 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-11-18 18:47:01,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 18:47:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-11-18 18:47:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 18:47:01,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:01,863 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 18:47:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:47:01,863 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 656913161, now seen corresponding path program 1 times [2022-11-18 18:47:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231336541] [2022-11-18 18:47:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:02,334 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 18:47:02,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231336541] [2022-11-18 18:47:02,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231336541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210048395] [2022-11-18 18:47:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:02,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:02,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:02,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:47:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:47:02,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:02,524 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:47:02,525 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:47:02,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:02,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:02,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 18:47:03,142 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 18:47:03,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:03,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 11 [2022-11-18 18:47:03,641 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 22 treesize of output 20 [2022-11-18 18:47:03,696 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 18:47:03,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210048395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:03,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:03,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2022-11-18 18:47:03,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212196330] [2022-11-18 18:47:03,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 18:47:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 18:47:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:47:03,700 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 18:47:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:04,230 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-11-18 18:47:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:47:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 18:47:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:04,233 INFO L225 Difference]: With dead ends: 91 [2022-11-18 18:47:04,233 INFO L226 Difference]: Without dead ends: 91 [2022-11-18 18:47:04,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-11-18 18:47:04,234 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 85 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:04,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 205 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-18 18:47:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-18 18:47:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2022-11-18 18:47:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 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 18:47:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-11-18 18:47:04,238 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 19 [2022-11-18 18:47:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:04,239 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-11-18 18:47:04,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 18:47:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-11-18 18:47:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 18:47:04,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:04,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:47:04,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash 658274998, now seen corresponding path program 1 times [2022-11-18 18:47:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:04,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694835664] [2022-11-18 18:47:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:04,787 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 18:47:04,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:04,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694835664] [2022-11-18 18:47:04,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694835664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:04,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764238137] [2022-11-18 18:47:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:04,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:04,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:04,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:47:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:04,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:47:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:04,905 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 10 treesize of output 8 [2022-11-18 18:47:04,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:47:04,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:47:05,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:05,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-18 18:47:05,240 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 18:47:05,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:05,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:05,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-18 18:47:05,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:05,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-11-18 18:47:05,509 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 5 treesize of output 3 [2022-11-18 18:47:05,515 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 16 treesize of output 12 [2022-11-18 18:47:05,561 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 10 treesize of output 8 [2022-11-18 18:47:05,572 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 18:47:05,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764238137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:05,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:05,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2022-11-18 18:47:05,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558308160] [2022-11-18 18:47:05,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:05,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:47:05,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:47:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2022-11-18 18:47:05,575 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 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 18:47:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:05,751 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-11-18 18:47:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:47:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 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 20 [2022-11-18 18:47:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:05,753 INFO L225 Difference]: With dead ends: 121 [2022-11-18 18:47:05,753 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 18:47:05,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=379, Unknown=1, NotChecked=0, Total=462 [2022-11-18 18:47:05,754 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:05,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 238 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-18 18:47:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 18:47:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2022-11-18 18:47:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-11-18 18:47:05,757 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 20 [2022-11-18 18:47:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:05,758 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-11-18 18:47:05,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 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 18:47:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-11-18 18:47:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:47:05,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:05,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:05,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:05,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:05,965 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1423532355, now seen corresponding path program 2 times [2022-11-18 18:47:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:05,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274777815] [2022-11-18 18:47:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:06,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:06,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274777815] [2022-11-18 18:47:06,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274777815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:06,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42711506] [2022-11-18 18:47:06,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:06,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:06,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:06,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:06,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:47:06,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:06,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 18:47:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:06,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:07,448 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-18 18:47:07,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-11-18 18:47:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:07,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:08,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 25 [2022-11-18 18:47:08,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-18 18:47:08,536 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 35 treesize of output 27 [2022-11-18 18:47:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:08,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42711506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:08,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:08,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-11-18 18:47:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353133195] [2022-11-18 18:47:08,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:08,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 18:47:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 18:47:08,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 18:47:08,574 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 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 18:47:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:09,863 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-11-18 18:47:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:47:09,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 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 25 [2022-11-18 18:47:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:09,868 INFO L225 Difference]: With dead ends: 96 [2022-11-18 18:47:09,868 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 18:47:09,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 18:47:09,870 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:09,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 295 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-11-18 18:47:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 18:47:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-11-18 18:47:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 85 states have internal predecessors, (98), 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 18:47:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-11-18 18:47:09,875 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2022-11-18 18:47:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:09,875 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-11-18 18:47:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 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 18:47:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-11-18 18:47:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 18:47:09,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:09,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:09,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:10,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:10,084 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash 54678101, now seen corresponding path program 1 times [2022-11-18 18:47:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164184973] [2022-11-18 18:47:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 18:47:10,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:10,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164184973] [2022-11-18 18:47:10,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164184973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:10,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:10,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:47:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708001672] [2022-11-18 18:47:10,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:10,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:10,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:10,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:10,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:10,140 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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 18:47:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:10,167 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2022-11-18 18:47:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-18 18:47:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:10,168 INFO L225 Difference]: With dead ends: 84 [2022-11-18 18:47:10,169 INFO L226 Difference]: Without dead ends: 84 [2022-11-18 18:47:10,169 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 18:47:10,170 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 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 18:47:10,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-18 18:47:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2022-11-18 18:47:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 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 18:47:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2022-11-18 18:47:10,174 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 28 [2022-11-18 18:47:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:10,174 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2022-11-18 18:47:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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 18:47:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2022-11-18 18:47:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 18:47:10,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:10,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:10,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 18:47:10,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:10,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1673469902, now seen corresponding path program 1 times [2022-11-18 18:47:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:10,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886462843] [2022-11-18 18:47:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886462843] [2022-11-18 18:47:10,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886462843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970694614] [2022-11-18 18:47:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:10,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:10,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:10,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:10,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:47:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:47:10,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:10,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:11,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:11,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 18:47:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:11,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:11,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 11 [2022-11-18 18:47:11,868 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 16 treesize of output 12 [2022-11-18 18:47:11,875 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 22 treesize of output 20 [2022-11-18 18:47:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970694614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:11,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:11,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-11-18 18:47:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457197635] [2022-11-18 18:47:11,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 18:47:11,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 18:47:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:47:11,897 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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 18:47:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:12,784 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2022-11-18 18:47:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:47:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-18 18:47:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:12,789 INFO L225 Difference]: With dead ends: 129 [2022-11-18 18:47:12,789 INFO L226 Difference]: Without dead ends: 129 [2022-11-18 18:47:12,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:47:12,791 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:12,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 237 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 173 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-11-18 18:47:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-18 18:47:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2022-11-18 18:47:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-11-18 18:47:12,794 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 30 [2022-11-18 18:47:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:12,794 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-11-18 18:47:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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 18:47:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-11-18 18:47:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 18:47:12,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:12,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:12,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:13,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:13,000 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash 351969265, now seen corresponding path program 2 times [2022-11-18 18:47:13,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:13,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572149170] [2022-11-18 18:47:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:13,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:14,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572149170] [2022-11-18 18:47:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572149170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565150505] [2022-11-18 18:47:14,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:14,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:14,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:14,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:14,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:47:14,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:14,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:14,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 18:47:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:14,432 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 10 treesize of output 8 [2022-11-18 18:47:14,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:47:14,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:47:15,120 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-18 18:47:15,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-11-18 18:47:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:15,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:16,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:16,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-18 18:47:16,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:16,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-11-18 18:47:16,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-18 18:47:16,112 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 16 treesize of output 12 [2022-11-18 18:47:16,215 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 10 treesize of output 8 [2022-11-18 18:47:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:16,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565150505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:16,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:16,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 32 [2022-11-18 18:47:16,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554091252] [2022-11-18 18:47:16,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:16,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 18:47:16,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 18:47:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=944, Unknown=1, NotChecked=0, Total=1056 [2022-11-18 18:47:16,248 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 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 18:47:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:17,274 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-11-18 18:47:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 18:47:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 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 31 [2022-11-18 18:47:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:17,275 INFO L225 Difference]: With dead ends: 94 [2022-11-18 18:47:17,275 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 18:47:17,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=246, Invalid=1733, Unknown=1, NotChecked=0, Total=1980 [2022-11-18 18:47:17,277 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:17,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 267 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-18 18:47:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 18:47:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-18 18:47:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.108695652173913) internal successors, (102), 93 states have internal predecessors, (102), 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 18:47:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-11-18 18:47:17,280 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 31 [2022-11-18 18:47:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:17,281 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-11-18 18:47:17,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 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 18:47:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-11-18 18:47:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 18:47:17,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:17,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:17,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:17,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:17,488 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1925553675, now seen corresponding path program 1 times [2022-11-18 18:47:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:17,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440986903] [2022-11-18 18:47:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:17,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440986903] [2022-11-18 18:47:17,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440986903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455951596] [2022-11-18 18:47:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:17,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:17,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:18,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:47:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 18:47:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:18,126 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:47:18,126 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:47:18,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:18,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:18,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 18:47:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:18,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:19,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 11 [2022-11-18 18:47:19,384 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 22 treesize of output 20 [2022-11-18 18:47:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:19,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455951596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:19,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:19,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-11-18 18:47:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630256967] [2022-11-18 18:47:19,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:19,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 18:47:19,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 18:47:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:47:19,492 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 30 states have internal predecessors, (77), 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 18:47:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:20,817 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2022-11-18 18:47:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:47:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-18 18:47:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:20,819 INFO L225 Difference]: With dead ends: 159 [2022-11-18 18:47:20,819 INFO L226 Difference]: Without dead ends: 159 [2022-11-18 18:47:20,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 18:47:20,821 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 168 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:20,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 370 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 450 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2022-11-18 18:47:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-18 18:47:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2022-11-18 18:47:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 117 states have internal predecessors, (132), 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 18:47:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2022-11-18 18:47:20,826 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 32 [2022-11-18 18:47:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:20,826 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2022-11-18 18:47:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 30 states have internal predecessors, (77), 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 18:47:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2022-11-18 18:47:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 18:47:20,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:20,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:20,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-18 18:47:21,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 18:47:21,034 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 617833804, now seen corresponding path program 1 times [2022-11-18 18:47:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:21,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630497255] [2022-11-18 18:47:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:21,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:21,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630497255] [2022-11-18 18:47:21,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630497255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663240824] [2022-11-18 18:47:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:21,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:21,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:21,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:47:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 18:47:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:21,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18:47:21,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-18 18:47:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:21,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:21,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663240824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:21,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:21,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 20 [2022-11-18 18:47:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836228109] [2022-11-18 18:47:21,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:47:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:47:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:47:21,772 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 18:47:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:22,360 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2022-11-18 18:47:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:47:22,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 18:47:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:22,362 INFO L225 Difference]: With dead ends: 140 [2022-11-18 18:47:22,362 INFO L226 Difference]: Without dead ends: 140 [2022-11-18 18:47:22,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:47:22,363 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:22,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 168 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:47:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-18 18:47:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 118. [2022-11-18 18:47:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 117 states have internal predecessors, (130), 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 18:47:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2022-11-18 18:47:22,369 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 33 [2022-11-18 18:47:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:22,371 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2022-11-18 18:47:22,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 18:47:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2022-11-18 18:47:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 18:47:22,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:22,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:22,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 18:47:22,589 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash -587507249, now seen corresponding path program 1 times [2022-11-18 18:47:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913343069] [2022-11-18 18:47:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:23,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913343069] [2022-11-18 18:47:23,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913343069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641888158] [2022-11-18 18:47:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:23,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:47:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:23,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:47:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:23,486 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 10 treesize of output 8 [2022-11-18 18:47:23,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:47:23,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:47:24,084 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-18 18:47:24,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-11-18 18:47:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:26,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:26,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-18 18:47:26,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:26,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-11-18 18:47:26,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-18 18:47:26,995 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 16 treesize of output 12 [2022-11-18 18:47:27,141 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 10 treesize of output 8 [2022-11-18 18:47:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:27,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641888158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:27,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:27,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 27 [2022-11-18 18:47:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121772365] [2022-11-18 18:47:27,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:27,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:47:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:47:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=662, Unknown=1, NotChecked=0, Total=756 [2022-11-18 18:47:27,171 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 28 states have internal predecessors, (87), 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 18:47:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:28,366 INFO L93 Difference]: Finished difference Result 240 states and 270 transitions. [2022-11-18 18:47:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:47:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-18 18:47:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:28,369 INFO L225 Difference]: With dead ends: 240 [2022-11-18 18:47:28,370 INFO L226 Difference]: Without dead ends: 240 [2022-11-18 18:47:28,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=202, Invalid=1357, Unknown=1, NotChecked=0, Total=1560 [2022-11-18 18:47:28,371 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 269 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:28,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 432 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 195 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-18 18:47:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-18 18:47:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2022-11-18 18:47:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 190 states have (on average 1.1473684210526316) internal successors, (218), 191 states have internal predecessors, (218), 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 18:47:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 218 transitions. [2022-11-18 18:47:28,386 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 218 transitions. Word has length 35 [2022-11-18 18:47:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:28,386 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 218 transitions. [2022-11-18 18:47:28,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 28 states have internal predecessors, (87), 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 18:47:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 218 transitions. [2022-11-18 18:47:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 18:47:28,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:28,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:28,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:28,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 18:47:28,597 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash -918987778, now seen corresponding path program 2 times [2022-11-18 18:47:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:28,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234960160] [2022-11-18 18:47:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:28,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:28,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234960160] [2022-11-18 18:47:28,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234960160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:28,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963128982] [2022-11-18 18:47:28,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:28,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:47:29,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:47:29,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:29,094 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:47:29,094 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:47:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:29,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963128982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:29,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:29,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-11-18 18:47:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350286251] [2022-11-18 18:47:29,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:29,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 18:47:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 18:47:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:47:29,923 INFO L87 Difference]: Start difference. First operand 192 states and 218 transitions. Second operand has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:30,617 INFO L93 Difference]: Finished difference Result 346 states and 393 transitions. [2022-11-18 18:47:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:47:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-18 18:47:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:30,619 INFO L225 Difference]: With dead ends: 346 [2022-11-18 18:47:30,619 INFO L226 Difference]: Without dead ends: 346 [2022-11-18 18:47:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:47:30,621 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 243 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:30,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 243 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:47:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-18 18:47:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 140. [2022-11-18 18:47:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 139 states have internal predecessors, (156), 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 18:47:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2022-11-18 18:47:30,627 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 36 [2022-11-18 18:47:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:30,628 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2022-11-18 18:47:30,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2022-11-18 18:47:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 18:47:30,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:30,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:30,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 18:47:30,835 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:30,835 INFO L85 PathProgramCache]: Analyzing trace with hash -63083351, now seen corresponding path program 2 times [2022-11-18 18:47:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959897102] [2022-11-18 18:47:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:31,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959897102] [2022-11-18 18:47:31,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959897102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954833729] [2022-11-18 18:47:31,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:31,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:31,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:31,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:47:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:47:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:31,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:32,964 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-11-18 18:47:32,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2022-11-18 18:47:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:34,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 25 [2022-11-18 18:47:34,356 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 16 treesize of output 12 [2022-11-18 18:47:34,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-18 18:47:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:34,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954833729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:34,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:34,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 16] total 39 [2022-11-18 18:47:34,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885197509] [2022-11-18 18:47:34,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:34,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 18:47:34,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 18:47:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 18:47:34,474 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 40 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 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 18:47:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:37,717 INFO L93 Difference]: Finished difference Result 306 states and 343 transitions. [2022-11-18 18:47:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:47:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 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 38 [2022-11-18 18:47:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:37,719 INFO L225 Difference]: With dead ends: 306 [2022-11-18 18:47:37,719 INFO L226 Difference]: Without dead ends: 306 [2022-11-18 18:47:37,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 18:47:37,721 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 194 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:37,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 896 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 814 Invalid, 0 Unknown, 289 Unchecked, 0.7s Time] [2022-11-18 18:47:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-18 18:47:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 195. [2022-11-18 18:47:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.1347150259067358) internal successors, (219), 194 states have internal predecessors, (219), 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 18:47:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 219 transitions. [2022-11-18 18:47:37,729 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 219 transitions. Word has length 38 [2022-11-18 18:47:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:37,729 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 219 transitions. [2022-11-18 18:47:37,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 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 18:47:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 219 transitions. [2022-11-18 18:47:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 18:47:37,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:37,731 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:37,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:37,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 18:47:37,936 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1940978674, now seen corresponding path program 3 times [2022-11-18 18:47:37,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:37,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686478400] [2022-11-18 18:47:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686478400] [2022-11-18 18:47:38,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686478400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690854284] [2022-11-18 18:47:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:38,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:38,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:38,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:47:38,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:47:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 18:47:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:39,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:39,278 INFO L321 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2022-11-18 18:47:39,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-11-18 18:47:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:39,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690854284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:39,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:39,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 25 [2022-11-18 18:47:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971516061] [2022-11-18 18:47:39,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:39,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 18:47:39,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:39,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 18:47:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:47:39,399 INFO L87 Difference]: Start difference. First operand 195 states and 219 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 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 18:47:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:40,269 INFO L93 Difference]: Finished difference Result 335 states and 373 transitions. [2022-11-18 18:47:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:47:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 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 42 [2022-11-18 18:47:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:40,273 INFO L225 Difference]: With dead ends: 335 [2022-11-18 18:47:40,273 INFO L226 Difference]: Without dead ends: 335 [2022-11-18 18:47:40,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 18:47:40,274 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 193 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:40,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 307 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:47:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-18 18:47:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2022-11-18 18:47:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 270 states have (on average 1.137037037037037) internal successors, (307), 271 states have internal predecessors, (307), 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 18:47:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 307 transitions. [2022-11-18 18:47:40,284 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 307 transitions. Word has length 42 [2022-11-18 18:47:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:40,284 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 307 transitions. [2022-11-18 18:47:40,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 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 18:47:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 307 transitions. [2022-11-18 18:47:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 18:47:40,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:40,286 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:40,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 18:47:40,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:40,492 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 221421661, now seen corresponding path program 3 times [2022-11-18 18:47:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:40,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325445696] [2022-11-18 18:47:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:41,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325445696] [2022-11-18 18:47:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325445696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250248822] [2022-11-18 18:47:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:41,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:41,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:47:41,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:47:41,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:41,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 18:47:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:41,693 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:47:41,693 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:47:41,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:43,289 INFO L321 Elim1Store]: treesize reduction 8, result has 81.4 percent of original size [2022-11-18 18:47:43,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 49 [2022-11-18 18:47:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:43,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:46,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 36 [2022-11-18 18:47:46,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:46,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2022-11-18 18:47:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:46,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250248822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:46,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:46,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 20] total 50 [2022-11-18 18:47:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239998672] [2022-11-18 18:47:46,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:46,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 18:47:46,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 18:47:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 18:47:46,530 INFO L87 Difference]: Start difference. First operand 272 states and 307 transitions. Second operand has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 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 18:47:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:52,683 INFO L93 Difference]: Finished difference Result 371 states and 422 transitions. [2022-11-18 18:47:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 18:47:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 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 44 [2022-11-18 18:47:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:52,687 INFO L225 Difference]: With dead ends: 371 [2022-11-18 18:47:52,687 INFO L226 Difference]: Without dead ends: 371 [2022-11-18 18:47:52,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=717, Invalid=7655, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 18:47:52,692 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 241 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:52,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 724 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 395 Invalid, 0 Unknown, 693 Unchecked, 0.4s Time] [2022-11-18 18:47:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-18 18:47:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 308. [2022-11-18 18:47:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 306 states have (on average 1.1601307189542485) internal successors, (355), 307 states have internal predecessors, (355), 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 18:47:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 355 transitions. [2022-11-18 18:47:52,702 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 355 transitions. Word has length 44 [2022-11-18 18:47:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:52,703 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 355 transitions. [2022-11-18 18:47:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 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 18:47:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 355 transitions. [2022-11-18 18:47:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 18:47:52,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:52,704 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:52,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:52,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:52,910 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1189913483, now seen corresponding path program 4 times [2022-11-18 18:47:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:52,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455934867] [2022-11-18 18:47:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:52,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:53,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:53,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455934867] [2022-11-18 18:47:53,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455934867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:53,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646785226] [2022-11-18 18:47:53,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:53,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:53,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:53,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:53,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:47:53,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 18:47:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:54,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:47:54,812 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-18 18:47:54,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 31 [2022-11-18 18:47:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:55,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:56,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 25 [2022-11-18 18:47:56,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-18 18:47:56,408 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 35 treesize of output 27 [2022-11-18 18:47:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646785226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:56,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:56,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 40 [2022-11-18 18:47:56,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485611447] [2022-11-18 18:47:56,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:56,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 18:47:56,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 18:47:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 18:47:56,443 INFO L87 Difference]: Start difference. First operand 308 states and 355 transitions. Second operand has 41 states, 40 states have (on average 2.9) internal successors, (116), 41 states have internal predecessors, (116), 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 18:47:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:58,425 INFO L93 Difference]: Finished difference Result 443 states and 507 transitions. [2022-11-18 18:47:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:47:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.9) internal successors, (116), 41 states have internal predecessors, (116), 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 44 [2022-11-18 18:47:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:58,428 INFO L225 Difference]: With dead ends: 443 [2022-11-18 18:47:58,428 INFO L226 Difference]: Without dead ends: 443 [2022-11-18 18:47:58,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=435, Invalid=3105, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 18:47:58,430 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 229 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:58,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 485 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 511 Invalid, 0 Unknown, 158 Unchecked, 0.5s Time] [2022-11-18 18:47:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-18 18:47:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 390. [2022-11-18 18:47:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 388 states have (on average 1.175257731958763) internal successors, (456), 389 states have internal predecessors, (456), 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 18:47:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 456 transitions. [2022-11-18 18:47:58,442 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 456 transitions. Word has length 44 [2022-11-18 18:47:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:58,442 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 456 transitions. [2022-11-18 18:47:58,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.9) internal successors, (116), 41 states have internal predecessors, (116), 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 18:47:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 456 transitions. [2022-11-18 18:47:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 18:47:58,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:58,444 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:58,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:58,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 18:47:58,652 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:47:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -248371778, now seen corresponding path program 4 times [2022-11-18 18:47:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:58,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724883351] [2022-11-18 18:47:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724883351] [2022-11-18 18:47:59,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724883351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29429566] [2022-11-18 18:47:59,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:59,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:59,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:59,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:59,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:47:59,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:59,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:59,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 18:47:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:59,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:59,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:59,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-18 18:48:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:00,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29429566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:00,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:00,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-11-18 18:48:00,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159589848] [2022-11-18 18:48:00,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:00,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:48:00,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:48:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:48:00,136 INFO L87 Difference]: Start difference. First operand 390 states and 456 transitions. Second operand has 26 states, 25 states have (on average 4.96) internal successors, (124), 26 states have internal predecessors, (124), 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 18:48:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:01,232 INFO L93 Difference]: Finished difference Result 638 states and 730 transitions. [2022-11-18 18:48:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:48:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.96) internal successors, (124), 26 states have internal predecessors, (124), 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 48 [2022-11-18 18:48:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:01,236 INFO L225 Difference]: With dead ends: 638 [2022-11-18 18:48:01,236 INFO L226 Difference]: Without dead ends: 638 [2022-11-18 18:48:01,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 18:48:01,237 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 298 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:01,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 459 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:48:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-18 18:48:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 414. [2022-11-18 18:48:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 412 states have (on average 1.162621359223301) internal successors, (479), 413 states have internal predecessors, (479), 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 18:48:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 479 transitions. [2022-11-18 18:48:01,263 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 479 transitions. Word has length 48 [2022-11-18 18:48:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:01,264 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 479 transitions. [2022-11-18 18:48:01,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.96) internal successors, (124), 26 states have internal predecessors, (124), 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 18:48:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 479 transitions. [2022-11-18 18:48:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 18:48:01,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:01,265 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:01,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:01,472 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:48:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 789612329, now seen corresponding path program 5 times [2022-11-18 18:48:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:01,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983792663] [2022-11-18 18:48:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 18:48:02,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:02,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983792663] [2022-11-18 18:48:02,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983792663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:02,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980712020] [2022-11-18 18:48:02,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:48:02,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:02,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:02,382 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:02,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:48:02,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 18:48:02,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 18:48:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:02,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:48:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:48:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:48:04,288 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-18 18:48:04,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2022-11-18 18:48:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:06,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 38 [2022-11-18 18:48:06,457 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 22 treesize of output 18 [2022-11-18 18:48:06,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-11-18 18:48:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:06,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980712020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:06,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:06,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 20] total 49 [2022-11-18 18:48:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755969948] [2022-11-18 18:48:06,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:06,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:48:06,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:48:06,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:48:06,617 INFO L87 Difference]: Start difference. First operand 414 states and 479 transitions. Second operand has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 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 18:48:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:14,118 INFO L93 Difference]: Finished difference Result 774 states and 900 transitions. [2022-11-18 18:48:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-18 18:48:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 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 50 [2022-11-18 18:48:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:14,122 INFO L225 Difference]: With dead ends: 774 [2022-11-18 18:48:14,122 INFO L226 Difference]: Without dead ends: 774 [2022-11-18 18:48:14,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1125, Invalid=10431, Unknown=0, NotChecked=0, Total=11556 [2022-11-18 18:48:14,126 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:14,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 728 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 760 Invalid, 0 Unknown, 437 Unchecked, 0.8s Time] [2022-11-18 18:48:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-18 18:48:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 434. [2022-11-18 18:48:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 432 states have (on average 1.1782407407407407) internal successors, (509), 433 states have internal predecessors, (509), 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 18:48:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 509 transitions. [2022-11-18 18:48:14,140 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 509 transitions. Word has length 50 [2022-11-18 18:48:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:14,141 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 509 transitions. [2022-11-18 18:48:14,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 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 18:48:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 509 transitions. [2022-11-18 18:48:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 18:48:14,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:14,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:14,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:14,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-18 18:48:14,348 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:48:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1730621137, now seen corresponding path program 3 times [2022-11-18 18:48:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030591092] [2022-11-18 18:48:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:15,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030591092] [2022-11-18 18:48:15,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030591092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838297841] [2022-11-18 18:48:15,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:48:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:15,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:15,764 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:15,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:48:15,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 18:48:15,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:48:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:16,017 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:48:16,018 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:48:16,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:48:16,406 INFO L321 Elim1Store]: treesize reduction 48, result has 55.1 percent of original size [2022-11-18 18:48:16,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 115 [2022-11-18 18:48:19,587 INFO L321 Elim1Store]: treesize reduction 94, result has 22.3 percent of original size [2022-11-18 18:48:19,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 46 [2022-11-18 18:48:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:48:19,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:22,482 INFO L321 Elim1Store]: treesize reduction 50, result has 35.9 percent of original size [2022-11-18 18:48:22,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 192 [2022-11-18 18:48:22,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:48:22,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 142 [2022-11-18 18:48:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:48:22,544 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-18 18:48:22,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 70 [2022-11-18 18:48:22,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:48:22,666 INFO L321 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2022-11-18 18:48:22,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 160 treesize of output 177 [2022-11-18 18:48:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:48:23,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838297841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:23,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:23,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2022-11-18 18:48:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574544761] [2022-11-18 18:48:23,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 18:48:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 18:48:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 18:48:23,589 INFO L87 Difference]: Start difference. First operand 434 states and 509 transitions. Second operand has 51 states, 50 states have (on average 2.26) internal successors, (113), 51 states have internal predecessors, (113), 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 18:48:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:35,471 INFO L93 Difference]: Finished difference Result 483 states and 557 transitions. [2022-11-18 18:48:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 18:48:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.26) internal successors, (113), 51 states have internal predecessors, (113), 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 53 [2022-11-18 18:48:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:35,475 INFO L225 Difference]: With dead ends: 483 [2022-11-18 18:48:35,475 INFO L226 Difference]: Without dead ends: 385 [2022-11-18 18:48:35,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4561 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1963, Invalid=14807, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:48:35,481 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:35,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 366 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 308 Unchecked, 0.1s Time] [2022-11-18 18:48:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-18 18:48:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-11-18 18:48:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.1932114882506528) internal successors, (457), 384 states have internal predecessors, (457), 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 18:48:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 457 transitions. [2022-11-18 18:48:35,491 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 457 transitions. Word has length 53 [2022-11-18 18:48:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:35,491 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 457 transitions. [2022-11-18 18:48:35,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.26) internal successors, (113), 51 states have internal predecessors, (113), 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 18:48:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 457 transitions. [2022-11-18 18:48:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-18 18:48:35,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:35,493 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:35,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-18 18:48:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:35,699 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:48:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 853243314, now seen corresponding path program 5 times [2022-11-18 18:48:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225331662] [2022-11-18 18:48:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:36,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225331662] [2022-11-18 18:48:36,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225331662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170190545] [2022-11-18 18:48:36,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:48:36,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:36,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:36,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:48:37,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 18:48:37,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 18:48:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:37,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18:48:37,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-18 18:48:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:37,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 23 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:38,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170190545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:38,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:38,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 39 [2022-11-18 18:48:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346804065] [2022-11-18 18:48:38,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:38,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 18:48:38,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 18:48:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 18:48:38,399 INFO L87 Difference]: Start difference. First operand 385 states and 457 transitions. Second operand has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 39 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:45,503 INFO L93 Difference]: Finished difference Result 1018 states and 1168 transitions. [2022-11-18 18:48:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 18:48:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 39 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-18 18:48:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:45,507 INFO L225 Difference]: With dead ends: 1018 [2022-11-18 18:48:45,508 INFO L226 Difference]: Without dead ends: 1018 [2022-11-18 18:48:45,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=865, Invalid=4835, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 18:48:45,509 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 868 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:45,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 835 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 18:48:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-18 18:48:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 392. [2022-11-18 18:48:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 390 states have (on average 1.1794871794871795) internal successors, (460), 391 states have internal predecessors, (460), 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 18:48:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 460 transitions. [2022-11-18 18:48:45,524 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 460 transitions. Word has length 54 [2022-11-18 18:48:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:45,524 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 460 transitions. [2022-11-18 18:48:45,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 39 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 460 transitions. [2022-11-18 18:48:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 18:48:45,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:45,526 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:45,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-18 18:48:45,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 18:48:45,732 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:48:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -101154107, now seen corresponding path program 6 times [2022-11-18 18:48:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:45,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558574394] [2022-11-18 18:48:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:48:46,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:46,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558574394] [2022-11-18 18:48:46,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558574394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:46,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780118381] [2022-11-18 18:48:46,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:48:46,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:46,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:46,628 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:46,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:48:46,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 18:48:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-18 18:48:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:46,933 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:48:46,933 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:48:46,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:48:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:48:50,638 INFO L321 Elim1Store]: treesize reduction 16, result has 86.8 percent of original size [2022-11-18 18:48:50,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 49 treesize of output 127 [2022-11-18 18:48:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:51,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:00,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 68 treesize of output 58 [2022-11-18 18:49:00,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:49:01,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:01,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 166 [2022-11-18 18:49:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:01,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780118381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:01,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29, 28] total 68 [2022-11-18 18:49:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699104013] [2022-11-18 18:49:01,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:01,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 18:49:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 18:49:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=4275, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:49:01,468 INFO L87 Difference]: Start difference. First operand 392 states and 460 transitions. Second operand has 69 states, 68 states have (on average 2.3529411764705883) internal successors, (160), 69 states have internal predecessors, (160), 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 18:50:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:03,715 INFO L93 Difference]: Finished difference Result 668 states and 783 transitions. [2022-11-18 18:50:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-18 18:50:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.3529411764705883) internal successors, (160), 69 states have internal predecessors, (160), 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 56 [2022-11-18 18:50:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:03,718 INFO L225 Difference]: With dead ends: 668 [2022-11-18 18:50:03,718 INFO L226 Difference]: Without dead ends: 668 [2022-11-18 18:50:03,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 79 SyntacticMatches, 28 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6279 ImplicationChecksByTransitivity, 72.0s TimeCoverageRelationStatistics Valid=1566, Invalid=16504, Unknown=20, NotChecked=0, Total=18090 [2022-11-18 18:50:03,720 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 327 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 810 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:03,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1369 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 936 Invalid, 0 Unknown, 810 Unchecked, 0.9s Time] [2022-11-18 18:50:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-11-18 18:50:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 473. [2022-11-18 18:50:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.2059447983014862) internal successors, (568), 472 states have internal predecessors, (568), 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 18:50:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 568 transitions. [2022-11-18 18:50:03,733 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 568 transitions. Word has length 56 [2022-11-18 18:50:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:03,734 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 568 transitions. [2022-11-18 18:50:03,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.3529411764705883) internal successors, (160), 69 states have internal predecessors, (160), 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 18:50:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 568 transitions. [2022-11-18 18:50:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 18:50:03,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:03,739 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:03,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:03,945 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:50:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1444482825, now seen corresponding path program 7 times [2022-11-18 18:50:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:03,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771301504] [2022-11-18 18:50:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:50:04,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771301504] [2022-11-18 18:50:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771301504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99225173] [2022-11-18 18:50:04,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:50:04,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:04,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:04,734 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:04,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:50:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 18:50:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:04,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:50:05,846 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-11-18 18:50:05,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2022-11-18 18:50:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 18:50:06,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:07,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 25 [2022-11-18 18:50:07,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-18 18:50:07,205 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 16 treesize of output 12 [2022-11-18 18:50:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 18:50:07,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99225173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:07,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:07,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 41 [2022-11-18 18:50:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381640430] [2022-11-18 18:50:07,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:07,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 18:50:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 18:50:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 18:50:07,303 INFO L87 Difference]: Start difference. First operand 473 states and 568 transitions. Second operand has 42 states, 41 states have (on average 3.8292682926829267) internal successors, (157), 42 states have internal predecessors, (157), 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 18:50:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:09,507 INFO L93 Difference]: Finished difference Result 599 states and 723 transitions. [2022-11-18 18:50:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:50:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.8292682926829267) internal successors, (157), 42 states have internal predecessors, (157), 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 57 [2022-11-18 18:50:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:09,509 INFO L225 Difference]: With dead ends: 599 [2022-11-18 18:50:09,509 INFO L226 Difference]: Without dead ends: 599 [2022-11-18 18:50:09,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=722, Invalid=4108, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 18:50:09,511 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:09,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 391 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-18 18:50:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-18 18:50:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 429. [2022-11-18 18:50:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 427 states have (on average 1.2060889929742389) internal successors, (515), 428 states have internal predecessors, (515), 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 18:50:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 515 transitions. [2022-11-18 18:50:09,521 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 515 transitions. Word has length 57 [2022-11-18 18:50:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:09,521 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 515 transitions. [2022-11-18 18:50:09,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.8292682926829267) internal successors, (157), 42 states have internal predecessors, (157), 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 18:50:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 515 transitions. [2022-11-18 18:50:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 18:50:09,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:09,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:09,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-18 18:50:09,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:09,729 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:50:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 395114831, now seen corresponding path program 2 times [2022-11-18 18:50:09,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:09,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607754350] [2022-11-18 18:50:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:09,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:10,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:10,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607754350] [2022-11-18 18:50:10,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607754350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:10,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065655776] [2022-11-18 18:50:10,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:10,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:10,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:10,504 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:10,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 18:50:10,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:10,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:10,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 18:50:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:10,669 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 10 treesize of output 8 [2022-11-18 18:50:10,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:50:10,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:12,402 INFO L321 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2022-11-18 18:50:12,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 51 [2022-11-18 18:50:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:12,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:13,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:13,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 58 [2022-11-18 18:50:13,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:13,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 127 [2022-11-18 18:50:13,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-11-18 18:50:13,988 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 16 treesize of output 12 [2022-11-18 18:50:14,130 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 10 treesize of output 8 [2022-11-18 18:50:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:14,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065655776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:14,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:14,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 18] total 42 [2022-11-18 18:50:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194708784] [2022-11-18 18:50:14,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:14,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 18:50:14,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:14,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 18:50:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1584, Unknown=1, NotChecked=0, Total=1806 [2022-11-18 18:50:14,153 INFO L87 Difference]: Start difference. First operand 429 states and 515 transitions. Second operand has 43 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 43 states have internal predecessors, (165), 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 18:50:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:15,020 INFO L93 Difference]: Finished difference Result 428 states and 511 transitions. [2022-11-18 18:50:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:50:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 43 states have internal predecessors, (165), 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 61 [2022-11-18 18:50:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:15,022 INFO L225 Difference]: With dead ends: 428 [2022-11-18 18:50:15,022 INFO L226 Difference]: Without dead ends: 298 [2022-11-18 18:50:15,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=451, Invalid=2854, Unknown=1, NotChecked=0, Total=3306 [2022-11-18 18:50:15,023 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 254 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:15,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 615 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-11-18 18:50:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-18 18:50:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 119. [2022-11-18 18:50:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1864406779661016) internal successors, (140), 118 states have internal predecessors, (140), 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 18:50:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2022-11-18 18:50:15,027 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 61 [2022-11-18 18:50:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:15,028 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2022-11-18 18:50:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 43 states have internal predecessors, (165), 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 18:50:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2022-11-18 18:50:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 18:50:15,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:15,029 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:15,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 18:50:15,235 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:50:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash 9869201, now seen corresponding path program 8 times [2022-11-18 18:50:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:15,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326237165] [2022-11-18 18:50:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:15,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 18:50:16,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326237165] [2022-11-18 18:50:16,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326237165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682466968] [2022-11-18 18:50:16,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:16,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:16,067 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:16,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 18:50:16,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 18:50:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:16,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-18 18:50:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:18,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:18,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:18,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:18,805 INFO L321 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2022-11-18 18:50:18,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 53 [2022-11-18 18:50:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:19,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:22,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 74 treesize of output 64 [2022-11-18 18:50:22,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:50:22,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:22,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 118 [2022-11-18 18:50:22,635 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 16 treesize of output 12 [2022-11-18 18:50:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 5 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:22,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682466968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:22,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:22,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29, 28] total 68 [2022-11-18 18:50:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357139520] [2022-11-18 18:50:22,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:22,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 18:50:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 18:50:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:50:22,831 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 69 states, 68 states have (on average 2.5441176470588234) internal successors, (173), 69 states have internal predecessors, (173), 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 18:50:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:38,172 INFO L93 Difference]: Finished difference Result 315 states and 378 transitions. [2022-11-18 18:50:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-18 18:50:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.5441176470588234) internal successors, (173), 69 states have internal predecessors, (173), 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 62 [2022-11-18 18:50:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:38,174 INFO L225 Difference]: With dead ends: 315 [2022-11-18 18:50:38,174 INFO L226 Difference]: Without dead ends: 315 [2022-11-18 18:50:38,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 100 SyntacticMatches, 20 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7568 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1691, Invalid=21565, Unknown=0, NotChecked=0, Total=23256 [2022-11-18 18:50:38,177 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 304 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:38,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 949 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 346 Unchecked, 0.2s Time] [2022-11-18 18:50:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-18 18:50:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2022-11-18 18:50:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.2) internal successors, (270), 225 states have internal predecessors, (270), 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 18:50:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-11-18 18:50:38,183 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 62 [2022-11-18 18:50:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:38,183 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-11-18 18:50:38,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.5441176470588234) internal successors, (173), 69 states have internal predecessors, (173), 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 18:50:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-11-18 18:50:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-18 18:50:38,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:38,185 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:38,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:38,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 18:50:38,390 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-18 18:50:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1994294886, now seen corresponding path program 6 times [2022-11-18 18:50:38,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:38,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483616728] [2022-11-18 18:50:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:38,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 72 proven. 137 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:50:39,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:39,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483616728] [2022-11-18 18:50:39,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483616728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:39,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647697503] [2022-11-18 18:50:39,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:50:39,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:39,082 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:39,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 18:50:39,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 18:50:39,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 18:50:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:39,388 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 18:50:39,388 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 18:50:39,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 15 [2022-11-18 18:50:41,591 INFO L321 Elim1Store]: treesize reduction 8, result has 86.9 percent of original size [2022-11-18 18:50:41,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 67 [2022-11-18 18:50:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 18:50:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:44,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 36 [2022-11-18 18:50:44,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:44,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2022-11-18 18:50:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 33 proven. 145 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 18:50:44,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647697503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:44,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:44,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 21] total 60 [2022-11-18 18:50:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395090389] [2022-11-18 18:50:44,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:44,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 18:50:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 18:50:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=3197, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 18:50:44,823 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 60 states, 60 states have (on average 2.816666666666667) internal successors, (169), 60 states have internal predecessors, (169), 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 18:50:53,330 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|))) (and (= |c_ULTIMATE.start_cstrcspn_~s~0#1.offset| 0) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_cstrcspn_~s2#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcspn_~s2#1.base|))) (or (not (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 1) .cse1)) (= (select .cse2 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|) 0) (not (<= 0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|)) (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 2) .cse1)))) (= (select .cse2 (+ 1 |c_ULTIMATE.start_cstrcspn_~s2#1.offset|)) 0) (not (<= 0 (+ |c_ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1))))) (= |c_ULTIMATE.start_cstrcspn_~s2#1.base| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|) (= (select .cse0 3) 0) (= 0 |c_ULTIMATE.start_cstrcspn_~s2#1.offset|) (or (= (select .cse0 (+ |c_ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) 0) (forall ((|v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| Int)) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|))) (or (not (<= 0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|)) (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 2) .cse3) (not (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 1) .cse3)) (= (select .cse0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|) 0))))))) is different from false [2022-11-18 18:50:55,102 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|))) (and (= (select .cse0 (+ 2 |c_ULTIMATE.start_cstrcspn_~s~0#1.offset|)) 0) (<= |c_ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_cstrcspn_~s2#1.base|))) (or (forall ((|v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcspn_~s2#1.base|))) (or (not (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 1) .cse1)) (= (select .cse2 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|) 0) (not (<= 0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|)) (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 2) .cse1)))) (= (select .cse2 (+ 1 |c_ULTIMATE.start_cstrcspn_~s2#1.offset|)) 0) (not (<= 0 (+ |c_ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1))))) (= |c_ULTIMATE.start_cstrcspn_~s2#1.base| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|) (or (= (select .cse0 |c_ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| Int)) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|))) (or (not (<= 0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|)) (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 2) .cse3) (not (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 1) .cse3)) (= (select .cse0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|) 0))))) (<= 1 |c_ULTIMATE.start_cstrcspn_~s~0#1.offset|) (= 0 |c_ULTIMATE.start_cstrcspn_~s2#1.offset|))) is different from false [2022-11-18 18:50:55,516 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|))) (let ((.cse1 (forall ((|ULTIMATE.start_cstrcspn_~s~0#1.offset| Int)) (let ((.cse4 (select |c_#length| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|))) (or (= (select .cse0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 2) .cse4) (not (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) .cse4)) (not (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|))))))) (and (= (select .cse0 (+ 2 |c_ULTIMATE.start_cstrcspn_~s~0#1.offset|)) 0) (<= |c_ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (or (not |c_ULTIMATE.start_cstrcspn_#t~short210#1|) .cse1) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_cstrcspn_~s2#1.base|))) (or (forall ((|v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| Int)) (let ((.cse2 (select |c_#length| |c_ULTIMATE.start_cstrcspn_~s2#1.base|))) (or (not (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 1) .cse2)) (= (select .cse3 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|) 0) (not (<= 0 |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168|)) (<= (+ |v_ULTIMATE.start_cstrcspn_~s~0#1.offset_168| 2) .cse2)))) (= (select .cse3 (+ 1 |c_ULTIMATE.start_cstrcspn_~s2#1.offset|)) 0) (not (<= 0 (+ |c_ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1))))) (= |c_ULTIMATE.start_cstrcspn_~s2#1.base| |c_ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 1 |c_ULTIMATE.start_cstrcspn_~s~0#1.offset|) (or (= |c_ULTIMATE.start_cstrcspn_#t~mem208#1| 0) .cse1) (= 0 |c_ULTIMATE.start_cstrcspn_~s2#1.offset|)))) is different from false [2022-11-18 18:50:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:57,319 INFO L93 Difference]: Finished difference Result 472 states and 557 transitions. [2022-11-18 18:50:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-18 18:50:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.816666666666667) internal successors, (169), 60 states have internal predecessors, (169), 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 72 [2022-11-18 18:50:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:57,319 INFO L225 Difference]: With dead ends: 472 [2022-11-18 18:50:57,319 INFO L226 Difference]: Without dead ends: 0 [2022-11-18 18:50:57,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 120 SyntacticMatches, 31 SemanticMatches, 140 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 6617 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2815, Invalid=16365, Unknown=14, NotChecked=828, Total=20022 [2022-11-18 18:50:57,324 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 324 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:57,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 668 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 416 Unchecked, 0.0s Time] [2022-11-18 18:50:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-18 18:50:57,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-18 18:50:57,325 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 18:50:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-18 18:50:57,325 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2022-11-18 18:50:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:57,325 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 18:50:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.816666666666667) internal successors, (169), 60 states have internal predecessors, (169), 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 18:50:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-18 18:50:57,325 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-18 18:50:57,327 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2022-11-18 18:50:57,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2022-11-18 18:50:57,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2022-11-18 18:50:57,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2022-11-18 18:50:57,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2022-11-18 18:50:57,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (1 of 21 remaining) [2022-11-18 18:50:57,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2022-11-18 18:50:57,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 18:50:57,534 INFO L444 BasicCegarLoop]: Path program histogram: [8, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:57,536 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 18:50:57,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 06:50:57 BoogieIcfgContainer [2022-11-18 18:50:57,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 18:50:57,539 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 18:50:57,539 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 18:50:57,540 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 18:50:57,540 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:56" (3/4) ... [2022-11-18 18:50:57,543 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-18 18:50:57,556 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-18 18:50:57,556 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-18 18:50:57,557 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-18 18:50:57,557 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-18 18:50:57,599 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 18:50:57,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 18:50:57,600 INFO L158 Benchmark]: Toolchain (without parser) took 242781.50ms. Allocated memory was 123.7MB in the beginning and 281.0MB in the end (delta: 157.3MB). Free memory was 88.3MB in the beginning and 113.1MB in the end (delta: -24.8MB). Peak memory consumption was 132.2MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,600 INFO L158 Benchmark]: CDTParser took 0.65ms. Allocated memory is still 79.7MB. Free memory is still 37.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:50:57,600 INFO L158 Benchmark]: CACSL2BoogieTranslator took 664.50ms. Allocated memory is still 123.7MB. Free memory was 88.0MB in the beginning and 89.5MB in the end (delta: -1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,601 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.23ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 87.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,601 INFO L158 Benchmark]: Boogie Preprocessor took 64.39ms. Allocated memory is still 123.7MB. Free memory was 87.5MB in the beginning and 85.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,601 INFO L158 Benchmark]: RCFGBuilder took 611.39ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 70.7MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,601 INFO L158 Benchmark]: TraceAbstraction took 241255.74ms. Allocated memory was 123.7MB in the beginning and 281.0MB in the end (delta: 157.3MB). Free memory was 70.0MB in the beginning and 115.8MB in the end (delta: -45.9MB). Peak memory consumption was 114.0MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,602 INFO L158 Benchmark]: Witness Printer took 60.41ms. Allocated memory is still 281.0MB. Free memory was 115.8MB in the beginning and 113.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:50:57,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65ms. Allocated memory is still 79.7MB. Free memory is still 37.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 664.50ms. Allocated memory is still 123.7MB. Free memory was 88.0MB in the beginning and 89.5MB in the end (delta: -1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.23ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 87.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.39ms. Allocated memory is still 123.7MB. Free memory was 87.5MB in the beginning and 85.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 611.39ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 70.7MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 241255.74ms. Allocated memory was 123.7MB in the beginning and 281.0MB in the end (delta: 157.3MB). Free memory was 70.0MB in the beginning and 115.8MB in the end (delta: -45.9MB). Peak memory consumption was 114.0MB. Max. memory is 16.1GB. * Witness Printer took 60.41ms. Allocated memory is still 281.0MB. Free memory was 115.8MB in the beginning and 113.1MB in the end (delta: 2.7MB). 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: -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: 393]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 393]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 393]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 394]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 394]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 394]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 379]: 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, 53 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 241.2s, OverallIterations: 40, TraceHistogramMax: 9, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.1s, AutomataDifference: 142.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6224 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6224 mSDsluCounter, 12492 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4120 IncrementalHoareTripleChecker+Unchecked, 11238 mSDsCounter, 271 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8975 IncrementalHoareTripleChecker+Invalid, 13366 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 271 mSolverCounterUnsat, 1254 mSDtfsCounter, 8975 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3143 GetRequests, 1479 SyntacticMatches, 145 SemanticMatches, 1519 ConstructedPredicates, 3 IntricatePredicates, 3 DeprecatedPredicates, 37104 ImplicationChecksByTransitivity, 179.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=473occurred in iteration=36, InterpolantAutomatonStates: 878, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 40 MinimizatonAttempts, 2774 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 89.0s InterpolantComputationTime, 2118 NumberOfCodeBlocks, 2106 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 2976 ConstructedInterpolants, 684 QuantifiedInterpolants, 60125 SizeOfPredicates, 373 NumberOfNonLiveVariables, 4280 ConjunctsInSsa, 981 ConjunctsInUnsatCore, 84 InterpolantComputations, 18 PerfectInterpolantSequences, 575/3458 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 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-18 18:50:57,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0017d11e-9acf-429b-a21b-b08bcbbefb7b/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