./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0218.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- 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-b5237d8 [2022-11-21 16:53:55,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:53:55,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:53:55,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:53:55,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:53:55,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:53:55,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:53:55,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:53:55,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:53:55,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:53:55,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:53:55,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:53:55,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:53:55,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:53:55,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:53:55,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:53:55,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:53:55,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:53:55,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:53:55,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:53:55,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:53:55,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:53:55,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:53:55,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:53:55,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:53:55,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:53:55,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:53:55,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:53:55,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:53:55,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:53:55,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:53:55,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:53:55,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:53:55,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:53:55,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:53:55,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:53:55,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:53:55,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:53:55,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:53:55,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:53:55,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:53:55,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:53:55,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:53:55,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:53:55,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:53:55,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:53:55,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:53:55,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:53:55,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:53:55,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:53:55,520 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:53:55,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:53:55,521 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:53:55,522 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:53:55,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:53:55,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:53:55,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:53:55,523 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:53:55,523 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:53:55,523 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:53:55,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:53:55,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:53:55,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:53:55,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:53:55,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:53:55,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:53:55,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:53:55,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:53:55,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:53:55,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:53:55,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:53:55,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:53:55,526 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_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2022-11-21 16:53:55,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:53:55,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:53:55,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:53:55,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:53:55,831 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:53:55,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/memsafety/test-0218.i [2022-11-21 16:53:58,779 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:53:59,097 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:53:59,098 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/sv-benchmarks/c/memsafety/test-0218.i [2022-11-21 16:53:59,113 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/data/6eeeeb7b1/3cfc6216edf44da5a364313a35ebff65/FLAG6fad8f4c8 [2022-11-21 16:53:59,128 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/data/6eeeeb7b1/3cfc6216edf44da5a364313a35ebff65 [2022-11-21 16:53:59,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:53:59,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:53:59,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:53:59,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:53:59,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:53:59,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e953fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59, skipping insertion in model container [2022-11-21 16:53:59,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:53:59,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:53:59,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:53:59,607 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:53:59,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:53:59,707 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:53:59,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59 WrapperNode [2022-11-21 16:53:59,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:53:59,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:53:59,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:53:59,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:53:59,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,781 INFO L138 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2022-11-21 16:53:59,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:53:59,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:53:59,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:53:59,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:53:59,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:53:59,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:53:59,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:53:59,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:53:59,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (1/1) ... [2022-11-21 16:53:59,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:53:59,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:59,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:53:59,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:53:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-21 16:53:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-21 16:53:59,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:53:59,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:53:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:53:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:53:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:53:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 16:53:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:53:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:53:59,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:54:00,137 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:54:00,139 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:54:00,740 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:54:00,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:54:00,748 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-21 16:54:00,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:54:00 BoogieIcfgContainer [2022-11-21 16:54:00,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:54:00,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:54:00,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:54:00,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:54:00,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:53:59" (1/3) ... [2022-11-21 16:54:00,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1961e354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:54:00, skipping insertion in model container [2022-11-21 16:54:00,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:53:59" (2/3) ... [2022-11-21 16:54:00,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1961e354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:54:00, skipping insertion in model container [2022-11-21 16:54:00,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:54:00" (3/3) ... [2022-11-21 16:54:00,800 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0218.i [2022-11-21 16:54:00,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:54:00,824 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2022-11-21 16:54:00,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:54:00,879 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;@7826e17e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:54:00,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-11-21 16:54:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 163 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 159 states have internal predecessors, (184), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:54:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:54:00,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:00,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:54:00,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1074395626, now seen corresponding path program 1 times [2022-11-21 16:54:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:00,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248034241] [2022-11-21 16:54:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:01,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248034241] [2022-11-21 16:54:01,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248034241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:01,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:01,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:54:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108636385] [2022-11-21 16:54:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:01,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:54:01,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:54:01,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:54:01,135 INFO L87 Difference]: Start difference. First operand has 163 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 159 states have internal predecessors, (184), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-21 16:54:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:01,167 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2022-11-21 16:54:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:54:01,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-21 16:54:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:01,178 INFO L225 Difference]: With dead ends: 163 [2022-11-21 16:54:01,178 INFO L226 Difference]: Without dead ends: 161 [2022-11-21 16:54:01,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:54:01,184 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:01,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:54:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-21 16:54:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-21 16:54:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 93 states have (on average 1.89247311827957) internal successors, (176), 157 states have internal predecessors, (176), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:54:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2022-11-21 16:54:01,233 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 6 [2022-11-21 16:54:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:01,234 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2022-11-21 16:54:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-21 16:54:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2022-11-21 16:54:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:54:01,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:01,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:01,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:54:01,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1280335204, now seen corresponding path program 1 times [2022-11-21 16:54:01,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119447326] [2022-11-21 16:54:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:01,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:01,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:01,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119447326] [2022-11-21 16:54:01,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119447326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:01,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:01,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:54:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775812430] [2022-11-21 16:54:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:01,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:54:01,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:54:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:01,392 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:01,628 INFO L93 Difference]: Finished difference Result 313 states and 350 transitions. [2022-11-21 16:54:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:54:01,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 16:54:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:01,632 INFO L225 Difference]: With dead ends: 313 [2022-11-21 16:54:01,632 INFO L226 Difference]: Without dead ends: 313 [2022-11-21 16:54:01,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:01,634 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 161 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:01,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-21 16:54:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 223. [2022-11-21 16:54:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 152 states have (on average 1.868421052631579) internal successors, (284), 216 states have internal predecessors, (284), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 292 transitions. [2022-11-21 16:54:01,657 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 292 transitions. Word has length 7 [2022-11-21 16:54:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:01,657 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 292 transitions. [2022-11-21 16:54:01,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 292 transitions. [2022-11-21 16:54:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:54:01,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:01,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:01,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:54:01,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1280335203, now seen corresponding path program 1 times [2022-11-21 16:54:01,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419844966] [2022-11-21 16:54:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:01,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:01,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419844966] [2022-11-21 16:54:01,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419844966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:01,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:01,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:54:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740763323] [2022-11-21 16:54:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:01,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:01,873 INFO L87 Difference]: Start difference. First operand 223 states and 292 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-21 16:54:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:02,093 INFO L93 Difference]: Finished difference Result 241 states and 310 transitions. [2022-11-21 16:54:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:02,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-21 16:54:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:02,102 INFO L225 Difference]: With dead ends: 241 [2022-11-21 16:54:02,103 INFO L226 Difference]: Without dead ends: 241 [2022-11-21 16:54:02,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:02,105 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 208 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:02,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 238 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-21 16:54:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2022-11-21 16:54:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 154 states have (on average 1.8636363636363635) internal successors, (287), 218 states have internal predecessors, (287), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 295 transitions. [2022-11-21 16:54:02,134 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 295 transitions. Word has length 7 [2022-11-21 16:54:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:02,135 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 295 transitions. [2022-11-21 16:54:02,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-21 16:54:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 295 transitions. [2022-11-21 16:54:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:54:02,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:02,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:02,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:54:02,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1280335141, now seen corresponding path program 1 times [2022-11-21 16:54:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:02,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845562506] [2022-11-21 16:54:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:02,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845562506] [2022-11-21 16:54:02,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845562506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:02,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:02,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:54:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439833840] [2022-11-21 16:54:02,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:02,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:02,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:02,323 INFO L87 Difference]: Start difference. First operand 225 states and 295 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-21 16:54:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:02,494 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2022-11-21 16:54:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-21 16:54:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:02,496 INFO L225 Difference]: With dead ends: 240 [2022-11-21 16:54:02,497 INFO L226 Difference]: Without dead ends: 240 [2022-11-21 16:54:02,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:02,498 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:02,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 251 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-21 16:54:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2022-11-21 16:54:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 152 states have (on average 1.855263157894737) internal successors, (282), 215 states have internal predecessors, (282), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 290 transitions. [2022-11-21 16:54:02,512 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 290 transitions. Word has length 7 [2022-11-21 16:54:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:02,513 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 290 transitions. [2022-11-21 16:54:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-21 16:54:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 290 transitions. [2022-11-21 16:54:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:54:02,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:02,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:54:02,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1138725070, now seen corresponding path program 1 times [2022-11-21 16:54:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362376949] [2022-11-21 16:54:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:02,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:02,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362376949] [2022-11-21 16:54:02,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362376949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:02,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:02,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:54:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359134873] [2022-11-21 16:54:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:02,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:02,835 INFO L87 Difference]: Start difference. First operand 222 states and 290 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:03,143 INFO L93 Difference]: Finished difference Result 394 states and 505 transitions. [2022-11-21 16:54:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:54:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 16:54:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:03,146 INFO L225 Difference]: With dead ends: 394 [2022-11-21 16:54:03,146 INFO L226 Difference]: Without dead ends: 394 [2022-11-21 16:54:03,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:54:03,152 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 146 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:03,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 745 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-21 16:54:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 288. [2022-11-21 16:54:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 212 states have (on average 1.7971698113207548) internal successors, (381), 277 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:54:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2022-11-21 16:54:03,187 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 10 [2022-11-21 16:54:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:03,190 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2022-11-21 16:54:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2022-11-21 16:54:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:54:03,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:03,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:03,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:54:03,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:03,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:03,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1140572112, now seen corresponding path program 1 times [2022-11-21 16:54:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:03,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178026891] [2022-11-21 16:54:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:03,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:03,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178026891] [2022-11-21 16:54:03,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178026891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:03,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:03,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:54:03,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434412686] [2022-11-21 16:54:03,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:03,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:03,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:03,338 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:03,568 INFO L93 Difference]: Finished difference Result 384 states and 494 transitions. [2022-11-21 16:54:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:54:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 16:54:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:03,571 INFO L225 Difference]: With dead ends: 384 [2022-11-21 16:54:03,571 INFO L226 Difference]: Without dead ends: 384 [2022-11-21 16:54:03,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:54:03,573 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 126 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:03,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 714 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-21 16:54:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 288. [2022-11-21 16:54:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 212 states have (on average 1.7971698113207548) internal successors, (381), 277 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:54:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2022-11-21 16:54:03,585 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 10 [2022-11-21 16:54:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:03,585 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2022-11-21 16:54:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2022-11-21 16:54:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:54:03,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:03,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:03,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:54:03,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 940737540, now seen corresponding path program 1 times [2022-11-21 16:54:03,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:03,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224505309] [2022-11-21 16:54:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:03,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:03,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224505309] [2022-11-21 16:54:03,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224505309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:03,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:03,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:54:03,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816138289] [2022-11-21 16:54:03,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:03,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:54:03,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:54:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:03,611 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:03,730 INFO L93 Difference]: Finished difference Result 339 states and 444 transitions. [2022-11-21 16:54:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:54:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-21 16:54:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:03,734 INFO L225 Difference]: With dead ends: 339 [2022-11-21 16:54:03,734 INFO L226 Difference]: Without dead ends: 332 [2022-11-21 16:54:03,734 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 [2022-11-21 16:54:03,735 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 64 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:03,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 267 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-21 16:54:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2022-11-21 16:54:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 209 states have (on average 1.799043062200957) internal successors, (376), 274 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:54:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 392 transitions. [2022-11-21 16:54:03,745 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 392 transitions. Word has length 11 [2022-11-21 16:54:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:03,745 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 392 transitions. [2022-11-21 16:54:03,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 392 transitions. [2022-11-21 16:54:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:54:03,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:03,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:54:03,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 418669755, now seen corresponding path program 1 times [2022-11-21 16:54:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:03,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301014289] [2022-11-21 16:54:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:03,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:03,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301014289] [2022-11-21 16:54:03,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301014289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:03,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:03,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:03,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250562514] [2022-11-21 16:54:03,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:03,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:03,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:03,814 INFO L87 Difference]: Start difference. First operand 285 states and 392 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:04,099 INFO L93 Difference]: Finished difference Result 482 states and 587 transitions. [2022-11-21 16:54:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-21 16:54:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:04,102 INFO L225 Difference]: With dead ends: 482 [2022-11-21 16:54:04,102 INFO L226 Difference]: Without dead ends: 482 [2022-11-21 16:54:04,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:04,103 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 307 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:04,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 408 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-21 16:54:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 291. [2022-11-21 16:54:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 215 states have (on average 1.7767441860465116) internal successors, (382), 280 states have internal predecessors, (382), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:54:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2022-11-21 16:54:04,114 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 15 [2022-11-21 16:54:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:04,115 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2022-11-21 16:54:04,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2022-11-21 16:54:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:54:04,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:04,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:04,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:54:04,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 418669756, now seen corresponding path program 1 times [2022-11-21 16:54:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:04,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622073985] [2022-11-21 16:54:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:04,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:04,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:04,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622073985] [2022-11-21 16:54:04,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622073985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:04,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:04,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136320170] [2022-11-21 16:54:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:04,229 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:04,432 INFO L93 Difference]: Finished difference Result 389 states and 506 transitions. [2022-11-21 16:54:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:04,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-21 16:54:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:04,435 INFO L225 Difference]: With dead ends: 389 [2022-11-21 16:54:04,436 INFO L226 Difference]: Without dead ends: 389 [2022-11-21 16:54:04,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:04,436 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 331 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:04,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 264 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-21 16:54:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 288. [2022-11-21 16:54:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.7209302325581395) internal successors, (370), 277 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:54:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 386 transitions. [2022-11-21 16:54:04,452 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 386 transitions. Word has length 15 [2022-11-21 16:54:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:04,452 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 386 transitions. [2022-11-21 16:54:04,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 386 transitions. [2022-11-21 16:54:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 16:54:04,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:04,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:04,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:54:04,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash -66961466, now seen corresponding path program 1 times [2022-11-21 16:54:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:04,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282324554] [2022-11-21 16:54:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:04,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:04,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282324554] [2022-11-21 16:54:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282324554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:04,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:04,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:04,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308900479] [2022-11-21 16:54:04,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:04,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:04,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:04,635 INFO L87 Difference]: Start difference. First operand 288 states and 386 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:05,110 INFO L93 Difference]: Finished difference Result 608 states and 705 transitions. [2022-11-21 16:54:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:54:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-21 16:54:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:05,113 INFO L225 Difference]: With dead ends: 608 [2022-11-21 16:54:05,114 INFO L226 Difference]: Without dead ends: 608 [2022-11-21 16:54:05,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:05,114 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 647 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:05,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 560 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:54:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-21 16:54:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 285. [2022-11-21 16:54:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 216 states have (on average 1.6851851851851851) internal successors, (364), 274 states have internal predecessors, (364), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:54:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 380 transitions. [2022-11-21 16:54:05,131 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 380 transitions. Word has length 17 [2022-11-21 16:54:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:05,131 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 380 transitions. [2022-11-21 16:54:05,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 380 transitions. [2022-11-21 16:54:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 16:54:05,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:05,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:05,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:54:05,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash -66961465, now seen corresponding path program 1 times [2022-11-21 16:54:05,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:05,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211354744] [2022-11-21 16:54:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:05,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:05,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:05,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211354744] [2022-11-21 16:54:05,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211354744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:05,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:05,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:54:05,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571594739] [2022-11-21 16:54:05,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:05,433 INFO L87 Difference]: Start difference. First operand 285 states and 380 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:05,883 INFO L93 Difference]: Finished difference Result 586 states and 782 transitions. [2022-11-21 16:54:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:54:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-21 16:54:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:05,886 INFO L225 Difference]: With dead ends: 586 [2022-11-21 16:54:05,886 INFO L226 Difference]: Without dead ends: 586 [2022-11-21 16:54:05,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:54:05,887 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 526 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:05,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 636 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:54:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-21 16:54:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 347. [2022-11-21 16:54:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 274 states have (on average 1.667883211678832) internal successors, (457), 334 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 481 transitions. [2022-11-21 16:54:05,908 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 481 transitions. Word has length 17 [2022-11-21 16:54:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:05,909 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 481 transitions. [2022-11-21 16:54:05,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 481 transitions. [2022-11-21 16:54:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 16:54:05,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:05,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:54:05,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1874415928, now seen corresponding path program 1 times [2022-11-21 16:54:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:05,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819192630] [2022-11-21 16:54:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:06,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819192630] [2022-11-21 16:54:06,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819192630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:06,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:06,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:54:06,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499944058] [2022-11-21 16:54:06,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:06,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:06,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:06,032 INFO L87 Difference]: Start difference. First operand 347 states and 481 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:06,161 INFO L93 Difference]: Finished difference Result 551 states and 744 transitions. [2022-11-21 16:54:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:54:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-21 16:54:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:06,165 INFO L225 Difference]: With dead ends: 551 [2022-11-21 16:54:06,165 INFO L226 Difference]: Without dead ends: 551 [2022-11-21 16:54:06,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:54:06,166 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 227 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:06,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1358 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:06,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-21 16:54:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 347. [2022-11-21 16:54:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 274 states have (on average 1.6605839416058394) internal successors, (455), 334 states have internal predecessors, (455), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 479 transitions. [2022-11-21 16:54:06,182 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 479 transitions. Word has length 17 [2022-11-21 16:54:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:06,184 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 479 transitions. [2022-11-21 16:54:06,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 479 transitions. [2022-11-21 16:54:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:54:06,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:06,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:54:06,185 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2022703953, now seen corresponding path program 1 times [2022-11-21 16:54:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:06,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752473224] [2022-11-21 16:54:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:06,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752473224] [2022-11-21 16:54:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752473224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:06,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:06,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:54:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737950824] [2022-11-21 16:54:06,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:06,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:06,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:06,414 INFO L87 Difference]: Start difference. First operand 347 states and 479 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:06,903 INFO L93 Difference]: Finished difference Result 627 states and 851 transitions. [2022-11-21 16:54:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:54:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-21 16:54:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:06,906 INFO L225 Difference]: With dead ends: 627 [2022-11-21 16:54:06,907 INFO L226 Difference]: Without dead ends: 627 [2022-11-21 16:54:06,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:54:06,907 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 438 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:06,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 771 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:54:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-11-21 16:54:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 342. [2022-11-21 16:54:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 269 states have (on average 1.661710037174721) internal successors, (447), 329 states have internal predecessors, (447), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 471 transitions. [2022-11-21 16:54:06,927 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 471 transitions. Word has length 18 [2022-11-21 16:54:06,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:06,927 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 471 transitions. [2022-11-21 16:54:06,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 471 transitions. [2022-11-21 16:54:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:54:06,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:06,929 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, 1] [2022-11-21 16:54:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:54:06,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 413987999, now seen corresponding path program 1 times [2022-11-21 16:54:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119292315] [2022-11-21 16:54:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:06,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:07,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:07,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:07,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119292315] [2022-11-21 16:54:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119292315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:07,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:07,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:54:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923749541] [2022-11-21 16:54:07,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:54:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:54:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:54:07,446 INFO L87 Difference]: Start difference. First operand 342 states and 471 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:08,427 INFO L93 Difference]: Finished difference Result 704 states and 955 transitions. [2022-11-21 16:54:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:54:08,428 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-21 16:54:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:08,432 INFO L225 Difference]: With dead ends: 704 [2022-11-21 16:54:08,432 INFO L226 Difference]: Without dead ends: 702 [2022-11-21 16:54:08,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:54:08,433 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 503 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:08,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1400 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:54:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-21 16:54:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 336. [2022-11-21 16:54:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 263 states have (on average 1.6577946768060836) internal successors, (436), 323 states have internal predecessors, (436), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 460 transitions. [2022-11-21 16:54:08,471 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 460 transitions. Word has length 21 [2022-11-21 16:54:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:08,471 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 460 transitions. [2022-11-21 16:54:08,471 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 460 transitions. [2022-11-21 16:54:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:54:08,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:08,472 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, 1] [2022-11-21 16:54:08,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:54:08,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1380079796, now seen corresponding path program 1 times [2022-11-21 16:54:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392868374] [2022-11-21 16:54:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:08,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:08,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392868374] [2022-11-21 16:54:08,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392868374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:08,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:08,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:54:08,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969212494] [2022-11-21 16:54:08,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:08,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:54:08,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:54:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:54:08,859 INFO L87 Difference]: Start difference. First operand 336 states and 460 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:09,263 INFO L93 Difference]: Finished difference Result 512 states and 672 transitions. [2022-11-21 16:54:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:54:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-21 16:54:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:09,266 INFO L225 Difference]: With dead ends: 512 [2022-11-21 16:54:09,266 INFO L226 Difference]: Without dead ends: 512 [2022-11-21 16:54:09,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:54:09,267 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 241 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:09,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 867 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-21 16:54:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 352. [2022-11-21 16:54:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 279 states have (on average 1.6308243727598566) internal successors, (455), 337 states have internal predecessors, (455), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 479 transitions. [2022-11-21 16:54:09,279 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 479 transitions. Word has length 21 [2022-11-21 16:54:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:09,279 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 479 transitions. [2022-11-21 16:54:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 479 transitions. [2022-11-21 16:54:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:54:09,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:09,280 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, 1, 1] [2022-11-21 16:54:09,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:54:09,281 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:09,281 INFO L85 PathProgramCache]: Analyzing trace with hash -43201481, now seen corresponding path program 1 times [2022-11-21 16:54:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:09,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083639959] [2022-11-21 16:54:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:09,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:09,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:09,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:09,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083639959] [2022-11-21 16:54:09,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083639959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:09,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:09,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:54:09,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308087772] [2022-11-21 16:54:09,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:09,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:09,382 INFO L87 Difference]: Start difference. First operand 352 states and 479 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:09,503 INFO L93 Difference]: Finished difference Result 602 states and 821 transitions. [2022-11-21 16:54:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:54:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-21 16:54:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:09,507 INFO L225 Difference]: With dead ends: 602 [2022-11-21 16:54:09,507 INFO L226 Difference]: Without dead ends: 602 [2022-11-21 16:54:09,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:54:09,508 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 227 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:09,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1071 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-21 16:54:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 354. [2022-11-21 16:54:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 281 states have (on average 1.6263345195729537) internal successors, (457), 339 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 481 transitions. [2022-11-21 16:54:09,519 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 481 transitions. Word has length 22 [2022-11-21 16:54:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:09,519 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 481 transitions. [2022-11-21 16:54:09,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 481 transitions. [2022-11-21 16:54:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:54:09,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:09,520 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, 1, 1] [2022-11-21 16:54:09,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:54:09,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1731805881, now seen corresponding path program 1 times [2022-11-21 16:54:09,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:09,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041137333] [2022-11-21 16:54:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:09,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041137333] [2022-11-21 16:54:09,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041137333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:09,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:09,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:54:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816079068] [2022-11-21 16:54:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:09,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:09,637 INFO L87 Difference]: Start difference. First operand 354 states and 481 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:09,745 INFO L93 Difference]: Finished difference Result 598 states and 813 transitions. [2022-11-21 16:54:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:54:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-21 16:54:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:09,748 INFO L225 Difference]: With dead ends: 598 [2022-11-21 16:54:09,748 INFO L226 Difference]: Without dead ends: 598 [2022-11-21 16:54:09,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:54:09,749 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 224 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:09,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1091 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-21 16:54:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 352. [2022-11-21 16:54:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 279 states have (on average 1.6164874551971327) internal successors, (451), 337 states have internal predecessors, (451), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 475 transitions. [2022-11-21 16:54:09,762 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 475 transitions. Word has length 22 [2022-11-21 16:54:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:09,763 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 475 transitions. [2022-11-21 16:54:09,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 475 transitions. [2022-11-21 16:54:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:54:09,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:09,766 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, 1, 1] [2022-11-21 16:54:09,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:54:09,766 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -548760106, now seen corresponding path program 1 times [2022-11-21 16:54:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421593165] [2022-11-21 16:54:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:10,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:10,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421593165] [2022-11-21 16:54:10,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421593165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:10,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:10,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:54:10,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160640693] [2022-11-21 16:54:10,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:10,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:54:10,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:54:10,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:54:10,044 INFO L87 Difference]: Start difference. First operand 352 states and 475 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:10,436 INFO L93 Difference]: Finished difference Result 532 states and 702 transitions. [2022-11-21 16:54:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:54:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-21 16:54:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:10,439 INFO L225 Difference]: With dead ends: 532 [2022-11-21 16:54:10,439 INFO L226 Difference]: Without dead ends: 532 [2022-11-21 16:54:10,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:54:10,440 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 185 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:10,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1096 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:54:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-21 16:54:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 362. [2022-11-21 16:54:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 289 states have (on average 1.602076124567474) internal successors, (463), 345 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 487 transitions. [2022-11-21 16:54:10,452 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 487 transitions. Word has length 22 [2022-11-21 16:54:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:10,452 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 487 transitions. [2022-11-21 16:54:10,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 487 transitions. [2022-11-21 16:54:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:54:10,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:10,453 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, 1, 1, 1] [2022-11-21 16:54:10,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 16:54:10,454 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1581850198, now seen corresponding path program 1 times [2022-11-21 16:54:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220575161] [2022-11-21 16:54:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:10,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:10,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:10,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220575161] [2022-11-21 16:54:10,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220575161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:10,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:10,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766633185] [2022-11-21 16:54:10,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:10,523 INFO L87 Difference]: Start difference. First operand 362 states and 487 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:10,720 INFO L93 Difference]: Finished difference Result 639 states and 842 transitions. [2022-11-21 16:54:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-21 16:54:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:10,723 INFO L225 Difference]: With dead ends: 639 [2022-11-21 16:54:10,723 INFO L226 Difference]: Without dead ends: 639 [2022-11-21 16:54:10,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:10,724 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 513 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:10,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 497 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-21 16:54:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 357. [2022-11-21 16:54:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 290 states have (on average 1.5689655172413792) internal successors, (455), 340 states have internal predecessors, (455), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 479 transitions. [2022-11-21 16:54:10,735 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 479 transitions. Word has length 23 [2022-11-21 16:54:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:10,736 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 479 transitions. [2022-11-21 16:54:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 479 transitions. [2022-11-21 16:54:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:54:10,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:10,737 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, 1, 1, 1] [2022-11-21 16:54:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:54:10,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1581850197, now seen corresponding path program 1 times [2022-11-21 16:54:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:10,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682582033] [2022-11-21 16:54:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:10,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682582033] [2022-11-21 16:54:10,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682582033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:10,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:10,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568869839] [2022-11-21 16:54:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:10,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:10,849 INFO L87 Difference]: Start difference. First operand 357 states and 479 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:11,017 INFO L93 Difference]: Finished difference Result 409 states and 549 transitions. [2022-11-21 16:54:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:54:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-21 16:54:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:11,019 INFO L225 Difference]: With dead ends: 409 [2022-11-21 16:54:11,020 INFO L226 Difference]: Without dead ends: 409 [2022-11-21 16:54:11,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:11,020 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 155 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:11,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 388 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-21 16:54:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 354. [2022-11-21 16:54:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 290 states have (on average 1.5448275862068965) internal successors, (448), 337 states have internal predecessors, (448), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2022-11-21 16:54:11,031 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 23 [2022-11-21 16:54:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:11,031 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2022-11-21 16:54:11,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2022-11-21 16:54:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:54:11,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:11,032 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, 1, 1, 1, 1, 1] [2022-11-21 16:54:11,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 16:54:11,033 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:11,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1433519231, now seen corresponding path program 1 times [2022-11-21 16:54:11,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615401148] [2022-11-21 16:54:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:11,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:11,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615401148] [2022-11-21 16:54:11,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615401148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:11,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:11,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:11,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160156628] [2022-11-21 16:54:11,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:11,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:11,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:11,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:11,067 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:11,089 INFO L93 Difference]: Finished difference Result 370 states and 488 transitions. [2022-11-21 16:54:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:54:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-21 16:54:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:11,091 INFO L225 Difference]: With dead ends: 370 [2022-11-21 16:54:11,091 INFO L226 Difference]: Without dead ends: 370 [2022-11-21 16:54:11,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:11,092 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 3 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:11,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 472 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:54:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-21 16:54:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 366. [2022-11-21 16:54:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 302 states have (on average 1.5231788079470199) internal successors, (460), 349 states have internal predecessors, (460), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 484 transitions. [2022-11-21 16:54:11,101 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 484 transitions. Word has length 25 [2022-11-21 16:54:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:11,102 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 484 transitions. [2022-11-21 16:54:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 484 transitions. [2022-11-21 16:54:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:54:11,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:11,103 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, 1, 1, 1, 1, 1] [2022-11-21 16:54:11,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:54:11,103 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1431672189, now seen corresponding path program 1 times [2022-11-21 16:54:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:11,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487408489] [2022-11-21 16:54:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487408489] [2022-11-21 16:54:11,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487408489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:11,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:11,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353783136] [2022-11-21 16:54:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:11,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:11,205 INFO L87 Difference]: Start difference. First operand 366 states and 484 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:11,411 INFO L93 Difference]: Finished difference Result 704 states and 925 transitions. [2022-11-21 16:54:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-21 16:54:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:11,416 INFO L225 Difference]: With dead ends: 704 [2022-11-21 16:54:11,416 INFO L226 Difference]: Without dead ends: 704 [2022-11-21 16:54:11,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:11,417 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 295 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:11,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 444 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-21 16:54:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 442. [2022-11-21 16:54:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 378 states have (on average 1.5132275132275133) internal successors, (572), 425 states have internal predecessors, (572), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 596 transitions. [2022-11-21 16:54:11,435 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 596 transitions. Word has length 25 [2022-11-21 16:54:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:11,435 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 596 transitions. [2022-11-21 16:54:11,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 596 transitions. [2022-11-21 16:54:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:54:11,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:11,437 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, 1, 1, 1, 1, 1] [2022-11-21 16:54:11,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 16:54:11,437 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1431672190, now seen corresponding path program 1 times [2022-11-21 16:54:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:11,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592806488] [2022-11-21 16:54:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:11,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:11,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:11,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592806488] [2022-11-21 16:54:11,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592806488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:11,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:11,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:54:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11637635] [2022-11-21 16:54:11,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:11,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:54:11,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:54:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:11,477 INFO L87 Difference]: Start difference. First operand 442 states and 596 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:11,591 INFO L93 Difference]: Finished difference Result 512 states and 667 transitions. [2022-11-21 16:54:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:54:11,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-21 16:54:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:11,594 INFO L225 Difference]: With dead ends: 512 [2022-11-21 16:54:11,594 INFO L226 Difference]: Without dead ends: 512 [2022-11-21 16:54:11,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:11,595 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 126 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:11,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 233 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-21 16:54:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 440. [2022-11-21 16:54:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 378 states have (on average 1.4814814814814814) internal successors, (560), 423 states have internal predecessors, (560), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 584 transitions. [2022-11-21 16:54:11,607 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 584 transitions. Word has length 25 [2022-11-21 16:54:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:11,607 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 584 transitions. [2022-11-21 16:54:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 584 transitions. [2022-11-21 16:54:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:54:11,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:11,608 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, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 16:54:11,608 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -517911170, now seen corresponding path program 1 times [2022-11-21 16:54:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:11,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090946315] [2022-11-21 16:54:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:11,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090946315] [2022-11-21 16:54:11,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090946315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:11,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:11,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:54:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853106746] [2022-11-21 16:54:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:11,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:54:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:54:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:11,801 INFO L87 Difference]: Start difference. First operand 440 states and 584 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:12,209 INFO L93 Difference]: Finished difference Result 1078 states and 1436 transitions. [2022-11-21 16:54:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:54:12,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-21 16:54:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:12,214 INFO L225 Difference]: With dead ends: 1078 [2022-11-21 16:54:12,214 INFO L226 Difference]: Without dead ends: 1078 [2022-11-21 16:54:12,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:54:12,215 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 449 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:12,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1488 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:54:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-11-21 16:54:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 495. [2022-11-21 16:54:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 433 states have (on average 1.4595842956120093) internal successors, (632), 474 states have internal predecessors, (632), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 656 transitions. [2022-11-21 16:54:12,236 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 656 transitions. Word has length 26 [2022-11-21 16:54:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:12,239 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 656 transitions. [2022-11-21 16:54:12,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 656 transitions. [2022-11-21 16:54:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:54:12,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:12,240 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, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:12,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-21 16:54:12,240 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1028445347, now seen corresponding path program 1 times [2022-11-21 16:54:12,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:12,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89246030] [2022-11-21 16:54:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:12,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:12,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:12,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89246030] [2022-11-21 16:54:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89246030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:12,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:12,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:54:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128076185] [2022-11-21 16:54:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:12,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:54:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:54:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:12,375 INFO L87 Difference]: Start difference. First operand 495 states and 656 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:12,775 INFO L93 Difference]: Finished difference Result 1076 states and 1434 transitions. [2022-11-21 16:54:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:54:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-21 16:54:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:12,779 INFO L225 Difference]: With dead ends: 1076 [2022-11-21 16:54:12,780 INFO L226 Difference]: Without dead ends: 1076 [2022-11-21 16:54:12,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:54:12,781 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 428 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:12,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1695 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:54:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-11-21 16:54:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 438. [2022-11-21 16:54:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 378 states have (on average 1.4761904761904763) internal successors, (558), 421 states have internal predecessors, (558), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 582 transitions. [2022-11-21 16:54:12,805 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 582 transitions. Word has length 26 [2022-11-21 16:54:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:12,805 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 582 transitions. [2022-11-21 16:54:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 582 transitions. [2022-11-21 16:54:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:54:12,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:12,811 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, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 16:54:12,811 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1470694413, now seen corresponding path program 1 times [2022-11-21 16:54:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:12,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492732947] [2022-11-21 16:54:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:12,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492732947] [2022-11-21 16:54:12,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492732947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:12,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:12,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648177531] [2022-11-21 16:54:12,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:12,917 INFO L87 Difference]: Start difference. First operand 438 states and 582 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:13,112 INFO L93 Difference]: Finished difference Result 770 states and 1011 transitions. [2022-11-21 16:54:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-21 16:54:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:13,115 INFO L225 Difference]: With dead ends: 770 [2022-11-21 16:54:13,115 INFO L226 Difference]: Without dead ends: 770 [2022-11-21 16:54:13,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:13,116 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 330 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:13,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 406 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-11-21 16:54:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 438. [2022-11-21 16:54:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 378 states have (on average 1.4761904761904763) internal successors, (558), 421 states have internal predecessors, (558), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 582 transitions. [2022-11-21 16:54:13,132 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 582 transitions. Word has length 26 [2022-11-21 16:54:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:13,133 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 582 transitions. [2022-11-21 16:54:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 582 transitions. [2022-11-21 16:54:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:54:13,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:13,134 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, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:13,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-21 16:54:13,134 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:13,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2123208305, now seen corresponding path program 1 times [2022-11-21 16:54:13,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:13,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685183313] [2022-11-21 16:54:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:13,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:13,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685183313] [2022-11-21 16:54:13,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685183313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:13,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:13,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:54:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332446757] [2022-11-21 16:54:13,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:13,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:13,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:13,270 INFO L87 Difference]: Start difference. First operand 438 states and 582 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:13,354 INFO L93 Difference]: Finished difference Result 612 states and 801 transitions. [2022-11-21 16:54:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:54:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-21 16:54:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:13,357 INFO L225 Difference]: With dead ends: 612 [2022-11-21 16:54:13,357 INFO L226 Difference]: Without dead ends: 612 [2022-11-21 16:54:13,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:54:13,358 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 208 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:13,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1267 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-21 16:54:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 361. [2022-11-21 16:54:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 302 states have (on average 1.4635761589403973) internal successors, (442), 344 states have internal predecessors, (442), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 466 transitions. [2022-11-21 16:54:13,368 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 466 transitions. Word has length 26 [2022-11-21 16:54:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:13,368 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 466 transitions. [2022-11-21 16:54:13,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 466 transitions. [2022-11-21 16:54:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:54:13,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:13,370 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:13,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-21 16:54:13,371 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1124600241, now seen corresponding path program 1 times [2022-11-21 16:54:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:13,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465247803] [2022-11-21 16:54:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:13,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:13,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465247803] [2022-11-21 16:54:13,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465247803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:13,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:13,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:13,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794975368] [2022-11-21 16:54:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:13,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:13,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:13,503 INFO L87 Difference]: Start difference. First operand 361 states and 466 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:13,669 INFO L93 Difference]: Finished difference Result 421 states and 523 transitions. [2022-11-21 16:54:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:54:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-21 16:54:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:13,671 INFO L225 Difference]: With dead ends: 421 [2022-11-21 16:54:13,671 INFO L226 Difference]: Without dead ends: 421 [2022-11-21 16:54:13,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:13,672 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 137 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:13,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 579 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-21 16:54:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 361. [2022-11-21 16:54:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 302 states have (on average 1.4602649006622517) internal successors, (441), 344 states have internal predecessors, (441), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2022-11-21 16:54:13,680 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 27 [2022-11-21 16:54:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:13,680 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2022-11-21 16:54:13,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2022-11-21 16:54:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:54:13,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:13,681 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:13,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-21 16:54:13,682 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1447437661, now seen corresponding path program 1 times [2022-11-21 16:54:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:13,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730559215] [2022-11-21 16:54:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:13,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730559215] [2022-11-21 16:54:13,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730559215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:13,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:13,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:54:13,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854375297] [2022-11-21 16:54:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:13,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:54:13,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:54:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:13,812 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:14,043 INFO L93 Difference]: Finished difference Result 535 states and 682 transitions. [2022-11-21 16:54:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:54:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-21 16:54:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:14,045 INFO L225 Difference]: With dead ends: 535 [2022-11-21 16:54:14,046 INFO L226 Difference]: Without dead ends: 535 [2022-11-21 16:54:14,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:54:14,046 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 137 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:14,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1059 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-21 16:54:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 393. [2022-11-21 16:54:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 334 states have (on average 1.4341317365269461) internal successors, (479), 376 states have internal predecessors, (479), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 503 transitions. [2022-11-21 16:54:14,058 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 503 transitions. Word has length 27 [2022-11-21 16:54:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:14,058 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 503 transitions. [2022-11-21 16:54:14,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 503 transitions. [2022-11-21 16:54:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:54:14,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:14,059 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:14,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-21 16:54:14,060 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1447437467, now seen corresponding path program 1 times [2022-11-21 16:54:14,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:14,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045285119] [2022-11-21 16:54:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:14,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045285119] [2022-11-21 16:54:14,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045285119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:14,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:14,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:14,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73664174] [2022-11-21 16:54:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:14,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:14,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:14,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:14,172 INFO L87 Difference]: Start difference. First operand 393 states and 503 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:14,362 INFO L93 Difference]: Finished difference Result 756 states and 962 transitions. [2022-11-21 16:54:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:54:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-21 16:54:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:14,365 INFO L225 Difference]: With dead ends: 756 [2022-11-21 16:54:14,366 INFO L226 Difference]: Without dead ends: 756 [2022-11-21 16:54:14,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:14,366 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 398 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:14,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 564 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-11-21 16:54:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 509. [2022-11-21 16:54:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 450 states have (on average 1.4244444444444444) internal successors, (641), 492 states have internal predecessors, (641), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-21 16:54:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 665 transitions. [2022-11-21 16:54:14,381 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 665 transitions. Word has length 27 [2022-11-21 16:54:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:14,381 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 665 transitions. [2022-11-21 16:54:14,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 665 transitions. [2022-11-21 16:54:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:54:14,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:14,382 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-21 16:54:14,383 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash 503577342, now seen corresponding path program 1 times [2022-11-21 16:54:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:14,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883533721] [2022-11-21 16:54:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:54:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883533721] [2022-11-21 16:54:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883533721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:14,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:14,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:54:14,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790362314] [2022-11-21 16:54:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:54:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:54:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:54:14,731 INFO L87 Difference]: Start difference. First operand 509 states and 665 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:15,075 INFO L93 Difference]: Finished difference Result 688 states and 883 transitions. [2022-11-21 16:54:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:54:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-21 16:54:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:15,078 INFO L225 Difference]: With dead ends: 688 [2022-11-21 16:54:15,079 INFO L226 Difference]: Without dead ends: 688 [2022-11-21 16:54:15,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:54:15,079 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 435 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:15,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1415 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-21 16:54:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 452. [2022-11-21 16:54:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 397 states have (on average 1.438287153652393) internal successors, (571), 439 states have internal predecessors, (571), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 589 transitions. [2022-11-21 16:54:15,090 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 589 transitions. Word has length 28 [2022-11-21 16:54:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:15,091 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 589 transitions. [2022-11-21 16:54:15,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 589 transitions. [2022-11-21 16:54:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:54:15,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:15,092 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:15,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-21 16:54:15,092 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:15,093 INFO L85 PathProgramCache]: Analyzing trace with hash 293091951, now seen corresponding path program 1 times [2022-11-21 16:54:15,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:15,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869153724] [2022-11-21 16:54:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:15,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:15,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869153724] [2022-11-21 16:54:15,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869153724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:15,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:15,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:15,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99021212] [2022-11-21 16:54:15,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:15,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:15,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:15,183 INFO L87 Difference]: Start difference. First operand 452 states and 589 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:15,355 INFO L93 Difference]: Finished difference Result 617 states and 784 transitions. [2022-11-21 16:54:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-21 16:54:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:15,358 INFO L225 Difference]: With dead ends: 617 [2022-11-21 16:54:15,358 INFO L226 Difference]: Without dead ends: 617 [2022-11-21 16:54:15,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:15,359 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 272 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:15,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 353 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-21 16:54:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 339. [2022-11-21 16:54:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 285 states have (on average 1.424561403508772) internal successors, (406), 326 states have internal predecessors, (406), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 424 transitions. [2022-11-21 16:54:15,368 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 424 transitions. Word has length 28 [2022-11-21 16:54:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:15,368 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 424 transitions. [2022-11-21 16:54:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 424 transitions. [2022-11-21 16:54:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 16:54:15,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:15,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:15,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-21 16:54:15,370 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash -417408815, now seen corresponding path program 1 times [2022-11-21 16:54:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:15,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420621236] [2022-11-21 16:54:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:15,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:15,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:15,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420621236] [2022-11-21 16:54:15,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420621236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:15,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:15,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787557490] [2022-11-21 16:54:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:15,504 INFO L87 Difference]: Start difference. First operand 339 states and 424 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:15,632 INFO L93 Difference]: Finished difference Result 338 states and 422 transitions. [2022-11-21 16:54:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:54:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-21 16:54:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:15,634 INFO L225 Difference]: With dead ends: 338 [2022-11-21 16:54:15,634 INFO L226 Difference]: Without dead ends: 338 [2022-11-21 16:54:15,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:15,635 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 321 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:15,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 259 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-21 16:54:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2022-11-21 16:54:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 285 states have (on average 1.4175438596491228) internal successors, (404), 325 states have internal predecessors, (404), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 422 transitions. [2022-11-21 16:54:15,641 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 422 transitions. Word has length 33 [2022-11-21 16:54:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:15,642 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 422 transitions. [2022-11-21 16:54:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 422 transitions. [2022-11-21 16:54:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 16:54:15,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:15,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:15,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-21 16:54:15,643 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -417408816, now seen corresponding path program 1 times [2022-11-21 16:54:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384871010] [2022-11-21 16:54:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:15,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:15,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:15,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384871010] [2022-11-21 16:54:15,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384871010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:15,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:15,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188249798] [2022-11-21 16:54:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:15,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:15,746 INFO L87 Difference]: Start difference. First operand 338 states and 422 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:15,921 INFO L93 Difference]: Finished difference Result 407 states and 501 transitions. [2022-11-21 16:54:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:54:15,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-21 16:54:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:15,923 INFO L225 Difference]: With dead ends: 407 [2022-11-21 16:54:15,923 INFO L226 Difference]: Without dead ends: 407 [2022-11-21 16:54:15,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:15,924 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 294 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:15,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 373 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-21 16:54:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 337. [2022-11-21 16:54:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 285 states have (on average 1.4105263157894736) internal successors, (402), 324 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 420 transitions. [2022-11-21 16:54:15,935 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 420 transitions. Word has length 33 [2022-11-21 16:54:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:15,935 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 420 transitions. [2022-11-21 16:54:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 420 transitions. [2022-11-21 16:54:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:54:15,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:15,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:15,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-21 16:54:15,937 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1697910415, now seen corresponding path program 1 times [2022-11-21 16:54:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:15,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543211303] [2022-11-21 16:54:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:16,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:16,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543211303] [2022-11-21 16:54:16,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543211303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:16,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:16,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:54:16,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217880216] [2022-11-21 16:54:16,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:16,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:54:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:54:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:16,033 INFO L87 Difference]: Start difference. First operand 337 states and 420 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:16,268 INFO L93 Difference]: Finished difference Result 608 states and 733 transitions. [2022-11-21 16:54:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:54:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-11-21 16:54:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:16,271 INFO L225 Difference]: With dead ends: 608 [2022-11-21 16:54:16,271 INFO L226 Difference]: Without dead ends: 608 [2022-11-21 16:54:16,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:16,271 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 390 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:16,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 467 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-21 16:54:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 334. [2022-11-21 16:54:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 285 states have (on average 1.3894736842105264) internal successors, (396), 321 states have internal predecessors, (396), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 414 transitions. [2022-11-21 16:54:16,281 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 414 transitions. Word has length 35 [2022-11-21 16:54:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:16,281 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 414 transitions. [2022-11-21 16:54:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 414 transitions. [2022-11-21 16:54:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:54:16,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:16,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:16,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-21 16:54:16,282 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1697910414, now seen corresponding path program 1 times [2022-11-21 16:54:16,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700624120] [2022-11-21 16:54:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700624120] [2022-11-21 16:54:16,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700624120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:16,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:16,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:54:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898570652] [2022-11-21 16:54:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:16,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:54:16,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:54:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:54:16,451 INFO L87 Difference]: Start difference. First operand 334 states and 414 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:16,687 INFO L93 Difference]: Finished difference Result 466 states and 567 transitions. [2022-11-21 16:54:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:54:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-11-21 16:54:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:16,689 INFO L225 Difference]: With dead ends: 466 [2022-11-21 16:54:16,689 INFO L226 Difference]: Without dead ends: 466 [2022-11-21 16:54:16,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:54:16,690 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 597 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:16,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 429 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:54:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-21 16:54:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 333. [2022-11-21 16:54:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 285 states have (on average 1.3824561403508773) internal successors, (394), 320 states have internal predecessors, (394), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 412 transitions. [2022-11-21 16:54:16,703 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 412 transitions. Word has length 35 [2022-11-21 16:54:16,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:16,703 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 412 transitions. [2022-11-21 16:54:16,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:16,703 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 412 transitions. [2022-11-21 16:54:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:54:16,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:16,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:16,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-21 16:54:16,704 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:16,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1697910253, now seen corresponding path program 1 times [2022-11-21 16:54:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:16,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143051136] [2022-11-21 16:54:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:16,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:16,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143051136] [2022-11-21 16:54:16,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143051136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:16,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:16,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364960427] [2022-11-21 16:54:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:16,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:54:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:54:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:54:16,941 INFO L87 Difference]: Start difference. First operand 333 states and 412 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:17,042 INFO L93 Difference]: Finished difference Result 331 states and 408 transitions. [2022-11-21 16:54:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:54:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-11-21 16:54:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:17,044 INFO L225 Difference]: With dead ends: 331 [2022-11-21 16:54:17,044 INFO L226 Difference]: Without dead ends: 331 [2022-11-21 16:54:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:54:17,045 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 256 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:17,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 144 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:54:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-21 16:54:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-11-21 16:54:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 285 states have (on average 1.368421052631579) internal successors, (390), 318 states have internal predecessors, (390), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 408 transitions. [2022-11-21 16:54:17,052 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 408 transitions. Word has length 35 [2022-11-21 16:54:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:17,052 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 408 transitions. [2022-11-21 16:54:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 408 transitions. [2022-11-21 16:54:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 16:54:17,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:17,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:17,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-21 16:54:17,054 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1314168092, now seen corresponding path program 1 times [2022-11-21 16:54:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279377419] [2022-11-21 16:54:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:17,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:20,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279377419] [2022-11-21 16:54:20,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279377419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:20,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:20,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-21 16:54:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991654427] [2022-11-21 16:54:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:20,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:54:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:54:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:54:20,268 INFO L87 Difference]: Start difference. First operand 331 states and 408 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:21,817 INFO L93 Difference]: Finished difference Result 363 states and 441 transitions. [2022-11-21 16:54:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:54:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-21 16:54:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:21,819 INFO L225 Difference]: With dead ends: 363 [2022-11-21 16:54:21,819 INFO L226 Difference]: Without dead ends: 363 [2022-11-21 16:54:21,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:54:21,820 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 143 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:21,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1200 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:54:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-21 16:54:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 353. [2022-11-21 16:54:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 307 states have (on average 1.3452768729641693) internal successors, (413), 340 states have internal predecessors, (413), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 431 transitions. [2022-11-21 16:54:21,827 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 431 transitions. Word has length 49 [2022-11-21 16:54:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:21,828 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 431 transitions. [2022-11-21 16:54:21,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 431 transitions. [2022-11-21 16:54:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:54:21,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:21,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:21,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-21 16:54:21,845 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1837653963, now seen corresponding path program 1 times [2022-11-21 16:54:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:21,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300765714] [2022-11-21 16:54:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:21,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300765714] [2022-11-21 16:54:22,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300765714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:54:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48236935] [2022-11-21 16:54:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:22,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:22,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:22,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:22,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:54:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 16:54:23,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:23,239 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:54:23,240 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 11 treesize of output 11 [2022-11-21 16:54:23,457 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 15 treesize of output 11 [2022-11-21 16:54:23,462 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 15 treesize of output 11 [2022-11-21 16:54:23,535 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 18 treesize of output 20 [2022-11-21 16:54:23,542 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 18 treesize of output 20 [2022-11-21 16:54:23,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-21 16:54:23,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-21 16:54:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:23,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:54:23,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48236935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:23,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:54:23,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 24 [2022-11-21 16:54:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447591418] [2022-11-21 16:54:23,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:23,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:54:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:54:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:54:23,724 INFO L87 Difference]: Start difference. First operand 353 states and 431 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:24,798 INFO L93 Difference]: Finished difference Result 779 states and 896 transitions. [2022-11-21 16:54:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:54:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-11-21 16:54:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:24,801 INFO L225 Difference]: With dead ends: 779 [2022-11-21 16:54:24,801 INFO L226 Difference]: Without dead ends: 779 [2022-11-21 16:54:24,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:54:24,802 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 675 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:24,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1503 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:54:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-21 16:54:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 383. [2022-11-21 16:54:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 337 states have (on average 1.3293768545994065) internal successors, (448), 370 states have internal predecessors, (448), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-21 16:54:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 466 transitions. [2022-11-21 16:54:24,813 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 466 transitions. Word has length 50 [2022-11-21 16:54:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:24,813 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 466 transitions. [2022-11-21 16:54:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 466 transitions. [2022-11-21 16:54:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:54:24,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:24,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:24,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-21 16:54:25,022 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -457671058, now seen corresponding path program 1 times [2022-11-21 16:54:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45159259] [2022-11-21 16:54:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:54:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45159259] [2022-11-21 16:54:27,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45159259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:27,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:27,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-21 16:54:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741240953] [2022-11-21 16:54:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:27,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:54:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:54:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:54:27,666 INFO L87 Difference]: Start difference. First operand 383 states and 466 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:29,594 INFO L93 Difference]: Finished difference Result 848 states and 1030 transitions. [2022-11-21 16:54:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:54:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-11-21 16:54:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:29,596 INFO L225 Difference]: With dead ends: 848 [2022-11-21 16:54:29,597 INFO L226 Difference]: Without dead ends: 848 [2022-11-21 16:54:29,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:54:29,598 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 473 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:29,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2007 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:54:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-21 16:54:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 535. [2022-11-21 16:54:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 481 states have (on average 1.32016632016632) internal successors, (635), 516 states have internal predecessors, (635), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-21 16:54:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 665 transitions. [2022-11-21 16:54:29,613 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 665 transitions. Word has length 50 [2022-11-21 16:54:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:29,613 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 665 transitions. [2022-11-21 16:54:29,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 665 transitions. [2022-11-21 16:54:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:54:29,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:29,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-21 16:54:29,615 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -455824016, now seen corresponding path program 1 times [2022-11-21 16:54:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718278251] [2022-11-21 16:54:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:29,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:30,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:30,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718278251] [2022-11-21 16:54:30,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718278251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:30,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:30,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 16:54:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991440952] [2022-11-21 16:54:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:30,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:54:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:54:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:54:30,211 INFO L87 Difference]: Start difference. First operand 535 states and 665 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:31,347 INFO L93 Difference]: Finished difference Result 1338 states and 1665 transitions. [2022-11-21 16:54:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:54:31,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-11-21 16:54:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:31,352 INFO L225 Difference]: With dead ends: 1338 [2022-11-21 16:54:31,352 INFO L226 Difference]: Without dead ends: 1338 [2022-11-21 16:54:31,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:54:31,353 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 845 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:31,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1939 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:54:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-11-21 16:54:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 700. [2022-11-21 16:54:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 631 states have (on average 1.3280507131537242) internal successors, (838), 673 states have internal predecessors, (838), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 17 states have call predecessors, (36), 18 states have call successors, (36) [2022-11-21 16:54:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 892 transitions. [2022-11-21 16:54:31,393 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 892 transitions. Word has length 50 [2022-11-21 16:54:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:31,393 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 892 transitions. [2022-11-21 16:54:31,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 892 transitions. [2022-11-21 16:54:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:54:31,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:31,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-21 16:54:31,398 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash -455824015, now seen corresponding path program 1 times [2022-11-21 16:54:31,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:31,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916581120] [2022-11-21 16:54:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:31,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916581120] [2022-11-21 16:54:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916581120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:54:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168822913] [2022-11-21 16:54:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:32,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:32,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:32,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:32,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:54:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:32,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-21 16:54:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:33,112 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:54:33,112 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 11 treesize of output 11 [2022-11-21 16:54:33,507 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 16 treesize of output 18 [2022-11-21 16:54:33,524 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 16 treesize of output 18 [2022-11-21 16:54:33,574 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 16 treesize of output 18 [2022-11-21 16:54:33,585 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 16 treesize of output 18 [2022-11-21 16:54:33,730 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-21 16:54:33,731 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 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-21 16:54:33,748 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-21 16:54:33,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 20 [2022-11-21 16:54:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:54:34,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:54:34,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 53 [2022-11-21 16:54:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:54:34,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:54:34,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2022-11-21 16:54:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:34,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:54:35,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:54:35,387 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 96 treesize of output 100 [2022-11-21 16:54:35,506 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* ~unnamed2~0~ITEM_PREV 4)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) (.cse6 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4) 1))) (and (forall ((v_ArrVal_312 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (or (= .cse0 |c_ULTIMATE.start_create_item_~item~0#1.base|) (= .cse0 0)))) (forall ((v_ArrVal_313 (Array Int Int))) (<= 0 (+ .cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_313 (Array Int Int))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2))) (or (= .cse5 0) (< (+ .cse3 .cse5) .cse6)))) (or (forall ((v_ArrVal_313 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_313 (Array Int Int))) (< (+ .cse3 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)) .cse6))))) is different from false [2022-11-21 16:54:36,002 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* ~unnamed2~0~ITEM_PREV 4)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) (.cse6 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* ~unnamed2~0~ITEM_NEXT 4) 1))) (and (forall ((v_ArrVal_312 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (or (= .cse0 |c_ULTIMATE.start_create_item_~item~0#1.base|) (= .cse0 0)))) (forall ((v_ArrVal_313 (Array Int Int))) (<= 0 (+ .cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_313 (Array Int Int))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2))) (or (= .cse5 0) (< (+ .cse3 .cse5) .cse6)))) (or (forall ((v_ArrVal_313 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_313 (Array Int Int))) (< (+ .cse3 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)) .cse6))))) is different from false [2022-11-21 16:54:36,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168822913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:54:36,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:54:36,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 27 [2022-11-21 16:54:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697600257] [2022-11-21 16:54:36,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:54:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:54:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:54:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1108, Unknown=4, NotChecked=138, Total=1406 [2022-11-21 16:54:36,910 INFO L87 Difference]: Start difference. First operand 700 states and 892 transitions. Second operand has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:54:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:40,916 INFO L93 Difference]: Finished difference Result 993 states and 1246 transitions. [2022-11-21 16:54:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:54:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-11-21 16:54:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:40,919 INFO L225 Difference]: With dead ends: 993 [2022-11-21 16:54:40,920 INFO L226 Difference]: Without dead ends: 993 [2022-11-21 16:54:40,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=429, Invalid=2326, Unknown=9, NotChecked=206, Total=2970 [2022-11-21 16:54:40,921 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 632 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:40,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 2385 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-21 16:54:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-21 16:54:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 798. [2022-11-21 16:54:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 721 states have (on average 1.3300970873786409) internal successors, (959), 767 states have internal predecessors, (959), 22 states have call successors, (22), 11 states have call predecessors, (22), 22 states have return successors, (44), 19 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-21 16:54:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1025 transitions. [2022-11-21 16:54:40,939 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1025 transitions. Word has length 50 [2022-11-21 16:54:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:40,939 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1025 transitions. [2022-11-21 16:54:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:54:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1025 transitions. [2022-11-21 16:54:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:54:40,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:40,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:40,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-21 16:54:41,152 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 267567628, now seen corresponding path program 1 times [2022-11-21 16:54:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388295077] [2022-11-21 16:54:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:42,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388295077] [2022-11-21 16:54:42,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388295077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:54:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155631364] [2022-11-21 16:54:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:42,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:42,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:42,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:54:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:42,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:54:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:42,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:54:43,123 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 15 treesize of output 11 [2022-11-21 16:54:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:54:43,205 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 29 treesize of output 28 [2022-11-21 16:54:43,352 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 21 treesize of output 9 [2022-11-21 16:54:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:43,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:54:43,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155631364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:43,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:54:43,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2022-11-21 16:54:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120244604] [2022-11-21 16:54:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:43,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:54:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:54:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:54:43,361 INFO L87 Difference]: Start difference. First operand 798 states and 1025 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:44,115 INFO L93 Difference]: Finished difference Result 1242 states and 1584 transitions. [2022-11-21 16:54:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:54:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:54:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:44,120 INFO L225 Difference]: With dead ends: 1242 [2022-11-21 16:54:44,120 INFO L226 Difference]: Without dead ends: 1242 [2022-11-21 16:54:44,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:54:44,121 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 722 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:44,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 942 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:54:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-21 16:54:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 916. [2022-11-21 16:54:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 823 states have (on average 1.330498177399757) internal successors, (1095), 877 states have internal predecessors, (1095), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 23 states have call predecessors, (60), 30 states have call successors, (60) [2022-11-21 16:54:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1185 transitions. [2022-11-21 16:54:44,141 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1185 transitions. Word has length 51 [2022-11-21 16:54:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:44,142 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1185 transitions. [2022-11-21 16:54:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1185 transitions. [2022-11-21 16:54:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:54:44,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:44,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:44,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:44,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:44,349 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:44,350 INFO L85 PathProgramCache]: Analyzing trace with hash 267567629, now seen corresponding path program 1 times [2022-11-21 16:54:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:44,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410746878] [2022-11-21 16:54:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:46,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:46,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410746878] [2022-11-21 16:54:46,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410746878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:54:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406334464] [2022-11-21 16:54:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:46,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:46,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:46,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:54:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-21 16:54:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:46,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:54:46,851 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 15 treesize of output 11 [2022-11-21 16:54:46,856 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 15 treesize of output 11 [2022-11-21 16:54:46,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:54:46,934 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 29 treesize of output 28 [2022-11-21 16:54:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:54:46,942 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 27 treesize of output 26 [2022-11-21 16:54:47,113 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 19 treesize of output 7 [2022-11-21 16:54:47,117 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 21 treesize of output 9 [2022-11-21 16:54:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:47,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:54:47,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406334464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:47,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:54:47,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 23 [2022-11-21 16:54:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195438041] [2022-11-21 16:54:47,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:47,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:54:47,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:54:47,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:54:47,178 INFO L87 Difference]: Start difference. First operand 916 states and 1185 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:48,028 INFO L93 Difference]: Finished difference Result 1180 states and 1503 transitions. [2022-11-21 16:54:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:54:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:54:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:48,032 INFO L225 Difference]: With dead ends: 1180 [2022-11-21 16:54:48,032 INFO L226 Difference]: Without dead ends: 1180 [2022-11-21 16:54:48,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:54:48,033 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 614 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:48,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 869 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:54:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-21 16:54:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 961. [2022-11-21 16:54:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 864 states have (on average 1.3368055555555556) internal successors, (1155), 920 states have internal predecessors, (1155), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 24 states have call predecessors, (64), 32 states have call successors, (64) [2022-11-21 16:54:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1251 transitions. [2022-11-21 16:54:48,053 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1251 transitions. Word has length 51 [2022-11-21 16:54:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:48,053 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1251 transitions. [2022-11-21 16:54:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1251 transitions. [2022-11-21 16:54:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:54:48,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:48,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:48,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:48,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:48,260 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash 269414670, now seen corresponding path program 1 times [2022-11-21 16:54:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053774903] [2022-11-21 16:54:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:48,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:48,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053774903] [2022-11-21 16:54:48,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053774903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:48,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:48,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:54:48,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874101965] [2022-11-21 16:54:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:48,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:54:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:54:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:54:48,638 INFO L87 Difference]: Start difference. First operand 961 states and 1251 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:49,287 INFO L93 Difference]: Finished difference Result 1487 states and 1913 transitions. [2022-11-21 16:54:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:54:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:54:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:49,291 INFO L225 Difference]: With dead ends: 1487 [2022-11-21 16:54:49,292 INFO L226 Difference]: Without dead ends: 1487 [2022-11-21 16:54:49,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:54:49,292 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 482 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:49,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1150 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:54:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-11-21 16:54:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 933. [2022-11-21 16:54:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 840 states have (on average 1.338095238095238) internal successors, (1124), 894 states have internal predecessors, (1124), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 23 states have call predecessors, (60), 30 states have call successors, (60) [2022-11-21 16:54:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1214 transitions. [2022-11-21 16:54:49,318 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1214 transitions. Word has length 51 [2022-11-21 16:54:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:49,319 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1214 transitions. [2022-11-21 16:54:49,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1214 transitions. [2022-11-21 16:54:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:54:49,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:49,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:49,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-21 16:54:49,320 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 269414671, now seen corresponding path program 1 times [2022-11-21 16:54:49,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666492910] [2022-11-21 16:54:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:49,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666492910] [2022-11-21 16:54:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666492910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:49,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:49,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:54:49,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8149152] [2022-11-21 16:54:49,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:54:49,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:54:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:54:49,863 INFO L87 Difference]: Start difference. First operand 933 states and 1214 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:50,550 INFO L93 Difference]: Finished difference Result 1507 states and 1953 transitions. [2022-11-21 16:54:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:54:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:54:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:50,554 INFO L225 Difference]: With dead ends: 1507 [2022-11-21 16:54:50,555 INFO L226 Difference]: Without dead ends: 1507 [2022-11-21 16:54:50,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:54:50,555 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 426 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:50,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1034 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:54:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-11-21 16:54:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1156. [2022-11-21 16:54:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1035 states have (on average 1.3458937198067633) internal successors, (1393), 1103 states have internal predecessors, (1393), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 30 states have call predecessors, (88), 44 states have call successors, (88) [2022-11-21 16:54:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1525 transitions. [2022-11-21 16:54:50,584 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1525 transitions. Word has length 51 [2022-11-21 16:54:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:50,585 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1525 transitions. [2022-11-21 16:54:50,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1525 transitions. [2022-11-21 16:54:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:54:50,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:50,586 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:50,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-21 16:54:50,586 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1432637722, now seen corresponding path program 1 times [2022-11-21 16:54:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911130088] [2022-11-21 16:54:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:51,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:51,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911130088] [2022-11-21 16:54:51,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911130088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:54:51,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188616738] [2022-11-21 16:54:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:51,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:51,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:51,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:54:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-21 16:54:52,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:52,760 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 15 treesize of output 11 [2022-11-21 16:54:52,768 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 15 treesize of output 11 [2022-11-21 16:54:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:54:52,900 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 33 treesize of output 32 [2022-11-21 16:54:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:54:52,909 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 27 treesize of output 26 [2022-11-21 16:54:53,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:54:53,230 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-11-21 16:54:53,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:54:53,242 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2022-11-21 16:54:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:53,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:54:53,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188616738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:53,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:54:53,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 26 [2022-11-21 16:54:53,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852900899] [2022-11-21 16:54:53,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:53,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:54:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:54:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:54:53,324 INFO L87 Difference]: Start difference. First operand 1156 states and 1525 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:55,479 INFO L93 Difference]: Finished difference Result 2007 states and 2617 transitions. [2022-11-21 16:54:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:54:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:54:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:55,491 INFO L225 Difference]: With dead ends: 2007 [2022-11-21 16:54:55,491 INFO L226 Difference]: Without dead ends: 2007 [2022-11-21 16:54:55,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:54:55,492 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1000 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:55,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 2047 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 16:54:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-11-21 16:54:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1102. [2022-11-21 16:54:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 989 states have (on average 1.346814964610718) internal successors, (1332), 1053 states have internal predecessors, (1332), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2022-11-21 16:54:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1452 transitions. [2022-11-21 16:54:55,521 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1452 transitions. Word has length 51 [2022-11-21 16:54:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:55,522 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1452 transitions. [2022-11-21 16:54:55,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:54:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1452 transitions. [2022-11-21 16:54:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:54:55,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:55,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:55,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:55,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:55,729 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:54:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1302902172, now seen corresponding path program 1 times [2022-11-21 16:54:55,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:55,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737422261] [2022-11-21 16:54:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:57,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:54:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:57,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:57,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737422261] [2022-11-21 16:54:57,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737422261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:57,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:57,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-21 16:54:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210252879] [2022-11-21 16:54:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:57,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:54:57,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:54:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:54:57,029 INFO L87 Difference]: Start difference. First operand 1102 states and 1452 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:00,173 INFO L93 Difference]: Finished difference Result 2442 states and 3236 transitions. [2022-11-21 16:55:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:55:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:55:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:00,179 INFO L225 Difference]: With dead ends: 2442 [2022-11-21 16:55:00,179 INFO L226 Difference]: Without dead ends: 2439 [2022-11-21 16:55:00,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:55:00,180 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1317 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:00,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 2436 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 16:55:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-11-21 16:55:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1290. [2022-11-21 16:55:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1157 states have (on average 1.3491789109766639) internal successors, (1561), 1231 states have internal predecessors, (1561), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 33 states have call predecessors, (100), 50 states have call successors, (100) [2022-11-21 16:55:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1711 transitions. [2022-11-21 16:55:00,214 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1711 transitions. Word has length 51 [2022-11-21 16:55:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:00,214 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1711 transitions. [2022-11-21 16:55:00,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1711 transitions. [2022-11-21 16:55:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:55:00,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:00,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:00,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-21 16:55:00,216 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1245643870, now seen corresponding path program 1 times [2022-11-21 16:55:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:00,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016683781] [2022-11-21 16:55:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:00,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016683781] [2022-11-21 16:55:00,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016683781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:00,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:00,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:55:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781467508] [2022-11-21 16:55:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:00,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:55:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:00,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:55:00,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:55:00,653 INFO L87 Difference]: Start difference. First operand 1290 states and 1711 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:01,415 INFO L93 Difference]: Finished difference Result 2146 states and 2810 transitions. [2022-11-21 16:55:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:55:01,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-21 16:55:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:01,420 INFO L225 Difference]: With dead ends: 2146 [2022-11-21 16:55:01,420 INFO L226 Difference]: Without dead ends: 2146 [2022-11-21 16:55:01,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:55:01,421 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 565 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:01,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 2227 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:55:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-21 16:55:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1439. [2022-11-21 16:55:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1290 states have (on average 1.3534883720930233) internal successors, (1746), 1372 states have internal predecessors, (1746), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 37 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-21 16:55:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1920 transitions. [2022-11-21 16:55:01,456 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1920 transitions. Word has length 51 [2022-11-21 16:55:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:01,456 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1920 transitions. [2022-11-21 16:55:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1920 transitions. [2022-11-21 16:55:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:55:01,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:01,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:01,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-21 16:55:01,458 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash -295339386, now seen corresponding path program 1 times [2022-11-21 16:55:01,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:01,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421199694] [2022-11-21 16:55:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:01,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:01,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:01,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:01,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421199694] [2022-11-21 16:55:01,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421199694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:01,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:01,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:55:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27373379] [2022-11-21 16:55:01,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:55:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:55:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:55:01,883 INFO L87 Difference]: Start difference. First operand 1439 states and 1920 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:02,325 INFO L93 Difference]: Finished difference Result 1668 states and 2185 transitions. [2022-11-21 16:55:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:55:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-21 16:55:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:02,332 INFO L225 Difference]: With dead ends: 1668 [2022-11-21 16:55:02,333 INFO L226 Difference]: Without dead ends: 1668 [2022-11-21 16:55:02,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:55:02,333 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 604 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:02,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1218 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:55:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-11-21 16:55:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1439. [2022-11-21 16:55:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1290 states have (on average 1.3534883720930233) internal successors, (1746), 1372 states have internal predecessors, (1746), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 37 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-21 16:55:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1920 transitions. [2022-11-21 16:55:02,360 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1920 transitions. Word has length 52 [2022-11-21 16:55:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:02,360 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1920 transitions. [2022-11-21 16:55:02,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1920 transitions. [2022-11-21 16:55:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:55:02,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:02,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:02,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-21 16:55:02,362 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -238081084, now seen corresponding path program 1 times [2022-11-21 16:55:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:02,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349972381] [2022-11-21 16:55:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:02,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:02,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:02,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349972381] [2022-11-21 16:55:02,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349972381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:02,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:02,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:55:02,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200580874] [2022-11-21 16:55:02,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:02,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:55:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:55:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:55:02,712 INFO L87 Difference]: Start difference. First operand 1439 states and 1920 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:03,096 INFO L93 Difference]: Finished difference Result 1705 states and 2226 transitions. [2022-11-21 16:55:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:55:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-21 16:55:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:03,100 INFO L225 Difference]: With dead ends: 1705 [2022-11-21 16:55:03,100 INFO L226 Difference]: Without dead ends: 1705 [2022-11-21 16:55:03,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:55:03,101 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 579 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:03,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:55:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-11-21 16:55:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2022-11-21 16:55:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1197 states have (on average 1.3500417710944026) internal successors, (1616), 1273 states have internal predecessors, (1616), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2022-11-21 16:55:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1772 transitions. [2022-11-21 16:55:03,125 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1772 transitions. Word has length 52 [2022-11-21 16:55:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:03,126 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1772 transitions. [2022-11-21 16:55:03,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1772 transitions. [2022-11-21 16:55:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:55:03,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:03,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:03,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-21 16:55:03,128 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1622196871, now seen corresponding path program 1 times [2022-11-21 16:55:03,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204854674] [2022-11-21 16:55:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:03,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:03,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204854674] [2022-11-21 16:55:03,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204854674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:03,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:03,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:55:03,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745574152] [2022-11-21 16:55:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:55:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:55:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:55:03,453 INFO L87 Difference]: Start difference. First operand 1334 states and 1772 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:03,801 INFO L93 Difference]: Finished difference Result 1558 states and 2020 transitions. [2022-11-21 16:55:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:55:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-21 16:55:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:03,806 INFO L225 Difference]: With dead ends: 1558 [2022-11-21 16:55:03,806 INFO L226 Difference]: Without dead ends: 1558 [2022-11-21 16:55:03,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:55:03,807 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 353 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:03,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1256 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:55:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-11-21 16:55:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1230. [2022-11-21 16:55:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1105 states have (on average 1.3402714932126696) internal successors, (1481), 1175 states have internal predecessors, (1481), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 31 states have call predecessors, (92), 46 states have call successors, (92) [2022-11-21 16:55:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1619 transitions. [2022-11-21 16:55:03,830 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1619 transitions. Word has length 52 [2022-11-21 16:55:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:03,831 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1619 transitions. [2022-11-21 16:55:03,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1619 transitions. [2022-11-21 16:55:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:55:03,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:03,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:03,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-21 16:55:03,832 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1233573638, now seen corresponding path program 1 times [2022-11-21 16:55:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:03,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973771862] [2022-11-21 16:55:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:04,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:04,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973771862] [2022-11-21 16:55:04,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973771862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:04,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:04,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 16:55:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566549939] [2022-11-21 16:55:04,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:55:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:55:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:55:04,432 INFO L87 Difference]: Start difference. First operand 1230 states and 1619 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:05,352 INFO L93 Difference]: Finished difference Result 1812 states and 2323 transitions. [2022-11-21 16:55:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:55:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-11-21 16:55:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:05,356 INFO L225 Difference]: With dead ends: 1812 [2022-11-21 16:55:05,357 INFO L226 Difference]: Without dead ends: 1812 [2022-11-21 16:55:05,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:55:05,357 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 640 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:05,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1753 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:55:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-21 16:55:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1346. [2022-11-21 16:55:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1209 states have (on average 1.3440860215053763) internal successors, (1625), 1285 states have internal predecessors, (1625), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2022-11-21 16:55:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1781 transitions. [2022-11-21 16:55:05,385 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1781 transitions. Word has length 53 [2022-11-21 16:55:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:05,385 INFO L495 AbstractCegarLoop]: Abstraction has 1346 states and 1781 transitions. [2022-11-21 16:55:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1781 transitions. [2022-11-21 16:55:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:55:05,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:05,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:05,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-21 16:55:05,387 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash -351851286, now seen corresponding path program 1 times [2022-11-21 16:55:05,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:05,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433693701] [2022-11-21 16:55:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:05,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:06,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433693701] [2022-11-21 16:55:06,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433693701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:06,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:06,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 16:55:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749977318] [2022-11-21 16:55:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:55:06,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:55:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:55:06,154 INFO L87 Difference]: Start difference. First operand 1346 states and 1781 transitions. Second operand has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:08,355 INFO L93 Difference]: Finished difference Result 2163 states and 2826 transitions. [2022-11-21 16:55:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:55:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-11-21 16:55:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:08,359 INFO L225 Difference]: With dead ends: 2163 [2022-11-21 16:55:08,359 INFO L226 Difference]: Without dead ends: 2163 [2022-11-21 16:55:08,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:55:08,360 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1338 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:08,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 1864 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:55:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-11-21 16:55:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1346. [2022-11-21 16:55:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1209 states have (on average 1.3440860215053763) internal successors, (1625), 1285 states have internal predecessors, (1625), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2022-11-21 16:55:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1781 transitions. [2022-11-21 16:55:08,390 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1781 transitions. Word has length 54 [2022-11-21 16:55:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:08,391 INFO L495 AbstractCegarLoop]: Abstraction has 1346 states and 1781 transitions. [2022-11-21 16:55:08,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1781 transitions. [2022-11-21 16:55:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:55:08,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:08,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:08,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-21 16:55:08,392 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1161197912, now seen corresponding path program 1 times [2022-11-21 16:55:08,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:08,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892403257] [2022-11-21 16:55:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892403257] [2022-11-21 16:55:08,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892403257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:08,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:08,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:55:08,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087327778] [2022-11-21 16:55:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:08,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:55:08,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:55:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:55:08,724 INFO L87 Difference]: Start difference. First operand 1346 states and 1781 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:09,174 INFO L93 Difference]: Finished difference Result 1557 states and 2022 transitions. [2022-11-21 16:55:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:55:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-11-21 16:55:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:09,178 INFO L225 Difference]: With dead ends: 1557 [2022-11-21 16:55:09,178 INFO L226 Difference]: Without dead ends: 1557 [2022-11-21 16:55:09,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:55:09,179 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 424 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:09,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 958 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:55:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-11-21 16:55:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1237. [2022-11-21 16:55:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1112 states have (on average 1.341726618705036) internal successors, (1492), 1182 states have internal predecessors, (1492), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 31 states have call predecessors, (92), 46 states have call successors, (92) [2022-11-21 16:55:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1630 transitions. [2022-11-21 16:55:09,200 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1630 transitions. Word has length 54 [2022-11-21 16:55:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:09,200 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 1630 transitions. [2022-11-21 16:55:09,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:55:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1630 transitions. [2022-11-21 16:55:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:55:09,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:09,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-21 16:55:09,202 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 112689098, now seen corresponding path program 1 times [2022-11-21 16:55:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765779815] [2022-11-21 16:55:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:09,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:09,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:09,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 16:55:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:55:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:09,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765779815] [2022-11-21 16:55:09,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765779815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:09,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:09,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 16:55:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771914660] [2022-11-21 16:55:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:09,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:55:09,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:55:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:55:09,949 INFO L87 Difference]: Start difference. First operand 1237 states and 1630 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:55:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:13,781 INFO L93 Difference]: Finished difference Result 4702 states and 6285 transitions. [2022-11-21 16:55:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:55:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-11-21 16:55:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:13,791 INFO L225 Difference]: With dead ends: 4702 [2022-11-21 16:55:13,791 INFO L226 Difference]: Without dead ends: 4702 [2022-11-21 16:55:13,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:55:13,792 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 1152 mSDsluCounter, 4553 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 5200 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:13,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 5200 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:55:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2022-11-21 16:55:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 1951. [2022-11-21 16:55:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1770 states have (on average 1.3468926553672316) internal successors, (2384), 1864 states have internal predecessors, (2384), 74 states have call successors, (74), 37 states have call predecessors, (74), 74 states have return successors, (148), 49 states have call predecessors, (148), 74 states have call successors, (148) [2022-11-21 16:55:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2606 transitions. [2022-11-21 16:55:13,856 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2606 transitions. Word has length 55 [2022-11-21 16:55:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:13,856 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 2606 transitions. [2022-11-21 16:55:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:55:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2606 transitions. [2022-11-21 16:55:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:55:13,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:13,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:13,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-21 16:55:13,858 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1681378697, now seen corresponding path program 1 times [2022-11-21 16:55:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091906444] [2022-11-21 16:55:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:13,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:14,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-21 16:55:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:55:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091906444] [2022-11-21 16:55:14,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091906444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:55:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557225536] [2022-11-21 16:55:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:55:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:55:14,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:55:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:55:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:14,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-21 16:55:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:55:14,887 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:55:14,887 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 11 treesize of output 11 [2022-11-21 16:55:15,019 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 15 treesize of output 11 [2022-11-21 16:55:15,025 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 15 treesize of output 11 [2022-11-21 16:55:15,137 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-21 16:55:15,137 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 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-21 16:55:15,153 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-21 16:55:15,154 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 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-21 16:55:15,238 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 18 treesize of output 20 [2022-11-21 16:55:15,247 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 18 treesize of output 20 [2022-11-21 16:55:15,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-21 16:55:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-21 16:55:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:15,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:55:15,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557225536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:15,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:55:15,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 23 [2022-11-21 16:55:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316770168] [2022-11-21 16:55:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:55:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:55:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:55:15,382 INFO L87 Difference]: Start difference. First operand 1951 states and 2606 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:55:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:16,592 INFO L93 Difference]: Finished difference Result 3030 states and 4094 transitions. [2022-11-21 16:55:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:55:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-11-21 16:55:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:16,599 INFO L225 Difference]: With dead ends: 3030 [2022-11-21 16:55:16,599 INFO L226 Difference]: Without dead ends: 3030 [2022-11-21 16:55:16,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:55:16,600 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 596 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:16,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 2043 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:55:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2022-11-21 16:55:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1700. [2022-11-21 16:55:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1539 states have (on average 1.3534762833008447) internal successors, (2083), 1625 states have internal predecessors, (2083), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 42 states have call predecessors, (128), 64 states have call successors, (128) [2022-11-21 16:55:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2275 transitions. [2022-11-21 16:55:16,643 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2275 transitions. Word has length 55 [2022-11-21 16:55:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:16,644 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2275 transitions. [2022-11-21 16:55:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:55:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2275 transitions. [2022-11-21 16:55:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:55:16,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:16,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:16,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:55:16,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:55:16,851 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:16,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:16,851 INFO L85 PathProgramCache]: Analyzing trace with hash 839700204, now seen corresponding path program 1 times [2022-11-21 16:55:16,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:16,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968332347] [2022-11-21 16:55:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:16,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:17,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:17,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-21 16:55:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:55:17,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968332347] [2022-11-21 16:55:17,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968332347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:17,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:17,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 16:55:17,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899037588] [2022-11-21 16:55:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:17,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:55:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:55:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:55:17,664 INFO L87 Difference]: Start difference. First operand 1700 states and 2275 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:55:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:19,476 INFO L93 Difference]: Finished difference Result 4178 states and 5625 transitions. [2022-11-21 16:55:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:55:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-11-21 16:55:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:19,486 INFO L225 Difference]: With dead ends: 4178 [2022-11-21 16:55:19,487 INFO L226 Difference]: Without dead ends: 4176 [2022-11-21 16:55:19,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 16:55:19,488 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1603 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:19,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 2228 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 16:55:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2022-11-21 16:55:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 1870. [2022-11-21 16:55:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1685 states have (on average 1.3513353115727003) internal successors, (2277), 1783 states have internal predecessors, (2277), 76 states have call successors, (76), 38 states have call predecessors, (76), 76 states have return successors, (152), 48 states have call predecessors, (152), 76 states have call successors, (152) [2022-11-21 16:55:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2505 transitions. [2022-11-21 16:55:19,537 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2505 transitions. Word has length 56 [2022-11-21 16:55:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:19,537 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2505 transitions. [2022-11-21 16:55:19,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:55:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2505 transitions. [2022-11-21 16:55:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:55:19,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:19,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:19,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-11-21 16:55:19,539 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash -954367591, now seen corresponding path program 1 times [2022-11-21 16:55:19,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:19,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425977426] [2022-11-21 16:55:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:20,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:55:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:55:20,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425977426] [2022-11-21 16:55:20,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425977426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:55:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301126902] [2022-11-21 16:55:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:20,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:55:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:55:20,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:55:20,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:55:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:20,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-21 16:55:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:55:20,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:55:20,975 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 15 treesize of output 11 [2022-11-21 16:55:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:21,035 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 29 treesize of output 28 [2022-11-21 16:55:21,222 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-21 16:55:21,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 23 treesize of output 33 [2022-11-21 16:55:21,292 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 21 treesize of output 9 [2022-11-21 16:55:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:21,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:55:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301126902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:55:21,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:55:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2022-11-21 16:55:21,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691831571] [2022-11-21 16:55:21,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:55:21,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:55:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:21,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:55:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:55:21,406 INFO L87 Difference]: Start difference. First operand 1870 states and 2505 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:55:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:22,932 INFO L93 Difference]: Finished difference Result 3227 states and 4322 transitions. [2022-11-21 16:55:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 16:55:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-21 16:55:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:22,939 INFO L225 Difference]: With dead ends: 3227 [2022-11-21 16:55:22,939 INFO L226 Difference]: Without dead ends: 3227 [2022-11-21 16:55:22,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=498, Invalid=1952, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:55:22,940 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 2070 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:22,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2071 Valid, 1734 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:55:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-11-21 16:55:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 1910. [2022-11-21 16:55:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1725 states have (on average 1.3489855072463768) internal successors, (2327), 1819 states have internal predecessors, (2327), 76 states have call successors, (76), 38 states have call predecessors, (76), 76 states have return successors, (152), 52 states have call predecessors, (152), 76 states have call successors, (152) [2022-11-21 16:55:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2555 transitions. [2022-11-21 16:55:22,983 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2555 transitions. Word has length 56 [2022-11-21 16:55:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:22,984 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2555 transitions. [2022-11-21 16:55:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:55:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2555 transitions. [2022-11-21 16:55:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:55:22,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:22,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:22,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:55:23,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:55:23,191 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash -954367590, now seen corresponding path program 1 times [2022-11-21 16:55:23,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544681527] [2022-11-21 16:55:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:24,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:24,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:55:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:55:24,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544681527] [2022-11-21 16:55:24,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544681527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:55:24,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44135072] [2022-11-21 16:55:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:24,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:55:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:55:24,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:55:25,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:55:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-21 16:55:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:55:25,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:55:25,763 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 15 treesize of output 11 [2022-11-21 16:55:25,770 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 15 treesize of output 11 [2022-11-21 16:55:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:25,898 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 55 treesize of output 46 [2022-11-21 16:55:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:25,904 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 57 treesize of output 48 [2022-11-21 16:55:26,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:26,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 27 [2022-11-21 16:55:26,214 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-21 16:55:26,215 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 15 treesize of output 15 [2022-11-21 16:55:26,369 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 32 treesize of output 20 [2022-11-21 16:55:26,372 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 39 treesize of output 21 [2022-11-21 16:55:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:26,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:55:34,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44135072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:55:34,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:55:34,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2022-11-21 16:55:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768583374] [2022-11-21 16:55:34,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:55:34,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 16:55:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 16:55:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:55:34,817 INFO L87 Difference]: Start difference. First operand 1910 states and 2555 transitions. Second operand has 33 states, 32 states have (on average 3.21875) internal successors, (103), 30 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:55:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:40,394 INFO L93 Difference]: Finished difference Result 4300 states and 5801 transitions. [2022-11-21 16:55:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-21 16:55:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.21875) internal successors, (103), 30 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-21 16:55:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:40,400 INFO L225 Difference]: With dead ends: 4300 [2022-11-21 16:55:40,400 INFO L226 Difference]: Without dead ends: 4300 [2022-11-21 16:55:40,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=844, Invalid=4268, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 16:55:40,402 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 4970 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4971 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:40,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4971 Valid, 3054 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 16:55:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2022-11-21 16:55:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 1910. [2022-11-21 16:55:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1725 states have (on average 1.3466666666666667) internal successors, (2323), 1819 states have internal predecessors, (2323), 76 states have call successors, (76), 38 states have call predecessors, (76), 76 states have return successors, (152), 52 states have call predecessors, (152), 76 states have call successors, (152) [2022-11-21 16:55:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2551 transitions. [2022-11-21 16:55:40,454 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2551 transitions. Word has length 56 [2022-11-21 16:55:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:40,454 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2551 transitions. [2022-11-21 16:55:40,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.21875) internal successors, (103), 30 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:55:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2551 transitions. [2022-11-21 16:55:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:55:40,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:40,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:40,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:55:40,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-21 16:55:40,670 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:55:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1104158581, now seen corresponding path program 1 times [2022-11-21 16:55:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846411831] [2022-11-21 16:55:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:55:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-21 16:55:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:55:42,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846411831] [2022-11-21 16:55:42,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846411831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:55:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788802314] [2022-11-21 16:55:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:42,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:55:42,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:55:42,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:55:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:55:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-21 16:55:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:55:43,021 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 15 treesize of output 11 [2022-11-21 16:55:43,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:43,219 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 30 treesize of output 23 [2022-11-21 16:55:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:43,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:43,584 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 56 treesize of output 52 [2022-11-21 16:55:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:43,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:55:44,563 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 84 treesize of output 78 [2022-11-21 16:55:44,613 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 104 treesize of output 98 [2022-11-21 16:55:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:55:45,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788802314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:55:45,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:55:45,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 16] total 49 [2022-11-21 16:55:45,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965872649] [2022-11-21 16:55:45,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:55:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 16:55:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 16:55:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2186, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:55:45,348 INFO L87 Difference]: Start difference. First operand 1910 states and 2551 transitions. Second operand has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:56:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:17,537 INFO L93 Difference]: Finished difference Result 9298 states and 12076 transitions. [2022-11-21 16:56:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-11-21 16:56:17,538 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2022-11-21 16:56:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:17,548 INFO L225 Difference]: With dead ends: 9298 [2022-11-21 16:56:17,548 INFO L226 Difference]: Without dead ends: 9295 [2022-11-21 16:56:17,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13862 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=4506, Invalid=36906, Unknown=0, NotChecked=0, Total=41412 [2022-11-21 16:56:17,552 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 4533 mSDsluCounter, 26235 mSDsCounter, 0 mSdLazyCounter, 17652 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4533 SdHoareTripleChecker+Valid, 27157 SdHoareTripleChecker+Invalid, 18090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 17652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:17,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4533 Valid, 27157 Invalid, 18090 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [438 Valid, 17652 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-11-21 16:56:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2022-11-21 16:56:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 1726. [2022-11-21 16:56:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1565 states have (on average 1.344408945686901) internal successors, (2104), 1647 states have internal predecessors, (2104), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 46 states have call predecessors, (128), 64 states have call successors, (128) [2022-11-21 16:56:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2296 transitions. [2022-11-21 16:56:17,629 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2296 transitions. Word has length 56 [2022-11-21 16:56:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:17,629 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 2296 transitions. [2022-11-21 16:56:17,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:56:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2296 transitions. [2022-11-21 16:56:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:56:17,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:17,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:17,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:56:17,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:17,837 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:56:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash -236583639, now seen corresponding path program 1 times [2022-11-21 16:56:17,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:17,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657871461] [2022-11-21 16:56:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:18,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:56:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:56:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:56:18,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657871461] [2022-11-21 16:56:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657871461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923620109] [2022-11-21 16:56:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:18,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:18,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:18,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:56:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 16:56:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:18,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:56:19,167 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 15 treesize of output 11 [2022-11-21 16:56:19,478 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2022-11-21 16:56:19,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 25 treesize of output 37 [2022-11-21 16:56:19,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:56:19,631 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-21 16:56:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:19,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:56:19,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923620109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:19,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:56:19,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2022-11-21 16:56:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052651625] [2022-11-21 16:56:19,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:56:19,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:56:19,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:56:19,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:56:19,738 INFO L87 Difference]: Start difference. First operand 1726 states and 2296 transitions. Second operand has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:56:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:21,521 INFO L93 Difference]: Finished difference Result 2520 states and 3321 transitions. [2022-11-21 16:56:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:56:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-21 16:56:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:21,525 INFO L225 Difference]: With dead ends: 2520 [2022-11-21 16:56:21,525 INFO L226 Difference]: Without dead ends: 2520 [2022-11-21 16:56:21,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:56:21,526 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1610 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:21,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 1764 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:56:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-11-21 16:56:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1870. [2022-11-21 16:56:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1693 states have (on average 1.3372711163614885) internal successors, (2264), 1779 states have internal predecessors, (2264), 72 states have call successors, (72), 36 states have call predecessors, (72), 72 states have return successors, (144), 54 states have call predecessors, (144), 72 states have call successors, (144) [2022-11-21 16:56:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2480 transitions. [2022-11-21 16:56:21,559 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2480 transitions. Word has length 57 [2022-11-21 16:56:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:21,560 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2480 transitions. [2022-11-21 16:56:21,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:56:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2480 transitions. [2022-11-21 16:56:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:56:21,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:21,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:21,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-21 16:56:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:21,768 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:56:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash -236583638, now seen corresponding path program 1 times [2022-11-21 16:56:21,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257304425] [2022-11-21 16:56:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:21,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:23,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:56:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:23,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:56:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:56:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257304425] [2022-11-21 16:56:23,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257304425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98235606] [2022-11-21 16:56:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:23,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:23,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:23,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:56:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-21 16:56:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:23,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:56:24,428 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 15 treesize of output 11 [2022-11-21 16:56:24,434 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 15 treesize of output 11 [2022-11-21 16:56:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:56:24,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 26 [2022-11-21 16:56:24,805 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-21 16:56:24,806 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 19 treesize of output 19 [2022-11-21 16:56:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:56:25,086 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-21 16:56:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:56:25,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-21 16:56:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:25,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:56:33,581 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:56:33,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98235606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:33,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:56:33,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 31 [2022-11-21 16:56:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400457225] [2022-11-21 16:56:33,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:56:33,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 16:56:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 16:56:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:56:33,583 INFO L87 Difference]: Start difference. First operand 1870 states and 2480 transitions. Second operand has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 29 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:56:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:48,838 INFO L93 Difference]: Finished difference Result 6559 states and 8773 transitions. [2022-11-21 16:56:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-21 16:56:48,843 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 29 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-21 16:56:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:48,851 INFO L225 Difference]: With dead ends: 6559 [2022-11-21 16:56:48,852 INFO L226 Difference]: Without dead ends: 6559 [2022-11-21 16:56:48,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4605 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=2340, Invalid=13160, Unknown=0, NotChecked=0, Total=15500 [2022-11-21 16:56:48,854 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 4619 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 5177 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4625 SdHoareTripleChecker+Valid, 4877 SdHoareTripleChecker+Invalid, 5664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 5177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:48,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4625 Valid, 4877 Invalid, 5664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [487 Valid, 5177 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-21 16:56:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2022-11-21 16:56:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 3245. [2022-11-21 16:56:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 2988 states have (on average 1.3340026773761713) internal successors, (3986), 3091 states have internal predecessors, (3986), 128 states have call successors, (128), 48 states have call predecessors, (128), 96 states have return successors, (256), 105 states have call predecessors, (256), 128 states have call successors, (256) [2022-11-21 16:56:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4370 transitions. [2022-11-21 16:56:48,938 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4370 transitions. Word has length 57 [2022-11-21 16:56:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:48,938 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 4370 transitions. [2022-11-21 16:56:48,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 29 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:56:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4370 transitions. [2022-11-21 16:56:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:56:48,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:48,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:48,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:56:49,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:49,148 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:56:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -628308544, now seen corresponding path program 1 times [2022-11-21 16:56:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:49,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479538593] [2022-11-21 16:56:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:56:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:56:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:56:50,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:50,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479538593] [2022-11-21 16:56:50,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479538593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:50,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517721152] [2022-11-21 16:56:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:50,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:50,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:50,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:56:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-21 16:56:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:50,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:56:50,783 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 15 treesize of output 11 [2022-11-21 16:56:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:56:50,877 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 29 treesize of output 28 [2022-11-21 16:56:51,115 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-21 16:56:51,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-21 16:56:51,192 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 21 treesize of output 9 [2022-11-21 16:56:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:51,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:56:51,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517721152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:51,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:56:51,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2022-11-21 16:56:51,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266893801] [2022-11-21 16:56:51,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:56:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:56:51,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:56:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:56:51,303 INFO L87 Difference]: Start difference. First operand 3245 states and 4370 transitions. Second operand has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:56:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:52,807 INFO L93 Difference]: Finished difference Result 4288 states and 5731 transitions. [2022-11-21 16:56:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:56:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-21 16:56:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:52,815 INFO L225 Difference]: With dead ends: 4288 [2022-11-21 16:56:52,815 INFO L226 Difference]: Without dead ends: 4288 [2022-11-21 16:56:52,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:56:52,817 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1189 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:52,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 2339 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 16:56:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2022-11-21 16:56:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3289. [2022-11-21 16:56:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3032 states have (on average 1.3324538258575198) internal successors, (4040), 3131 states have internal predecessors, (4040), 128 states have call successors, (128), 48 states have call predecessors, (128), 96 states have return successors, (256), 109 states have call predecessors, (256), 128 states have call successors, (256) [2022-11-21 16:56:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4424 transitions. [2022-11-21 16:56:52,878 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4424 transitions. Word has length 57 [2022-11-21 16:56:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:52,878 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4424 transitions. [2022-11-21 16:56:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:56:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4424 transitions. [2022-11-21 16:56:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:56:52,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:52,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:52,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:56:53,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-21 16:56:53,086 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:56:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -628308543, now seen corresponding path program 1 times [2022-11-21 16:56:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:53,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816012769] [2022-11-21 16:56:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:56:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:56:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:56:54,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816012769] [2022-11-21 16:56:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816012769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673675573] [2022-11-21 16:56:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:54,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:54,302 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:54,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:56:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-21 16:56:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:54,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:56:55,187 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 15 treesize of output 11 [2022-11-21 16:56:55,206 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 15 treesize of output 11 [2022-11-21 16:56:55,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:56:55,341 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 46 treesize of output 37 [2022-11-21 16:56:55,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:56:55,351 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 27 treesize of output 26 [2022-11-21 16:56:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:56:55,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 22 [2022-11-21 16:56:55,654 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-21 16:56:55,654 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 15 treesize of output 15 [2022-11-21 16:56:55,806 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 19 treesize of output 7 [2022-11-21 16:56:55,809 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 25 treesize of output 13 [2022-11-21 16:56:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:55,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:56:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673675573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:58,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:56:58,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2022-11-21 16:56:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198069154] [2022-11-21 16:56:58,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:56:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:56:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:56:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:56:58,175 INFO L87 Difference]: Start difference. First operand 3289 states and 4424 transitions. Second operand has 30 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 26 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:57:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:01,750 INFO L93 Difference]: Finished difference Result 4629 states and 6165 transitions. [2022-11-21 16:57:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:57:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 26 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-21 16:57:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:01,755 INFO L225 Difference]: With dead ends: 4629 [2022-11-21 16:57:01,755 INFO L226 Difference]: Without dead ends: 4629 [2022-11-21 16:57:01,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=523, Invalid=2339, Unknown=0, NotChecked=0, Total=2862 [2022-11-21 16:57:01,756 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 2471 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:01,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2471 Valid, 2774 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-21 16:57:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-11-21 16:57:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 3361. [2022-11-21 16:57:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3100 states have (on average 1.3335483870967741) internal successors, (4134), 3199 states have internal predecessors, (4134), 132 states have call successors, (132), 48 states have call predecessors, (132), 96 states have return successors, (264), 113 states have call predecessors, (264), 132 states have call successors, (264) [2022-11-21 16:57:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4530 transitions. [2022-11-21 16:57:01,809 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4530 transitions. Word has length 57 [2022-11-21 16:57:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:01,810 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 4530 transitions. [2022-11-21 16:57:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 26 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:57:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4530 transitions. [2022-11-21 16:57:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:57:01,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:01,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:01,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-21 16:57:02,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:02,017 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-21 16:57:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2013817809, now seen corresponding path program 1 times [2022-11-21 16:57:02,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:02,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483912897] [2022-11-21 16:57:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:57:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:04,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483912897] [2022-11-21 16:57:04,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483912897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:04,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178111741] [2022-11-21 16:57:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:04,784 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:04,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a30ce6d5-bcd8-489d-8931-0e115efedc4c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:57:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-21 16:57:04,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:05,052 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:57:05,053 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 11 treesize of output 11 [2022-11-21 16:57:05,464 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 15 treesize of output 11 [2022-11-21 16:57:05,475 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 15 treesize of output 11 [2022-11-21 16:57:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:05,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:57:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:05,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:57:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:05,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 16:57:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:05,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 16:57:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:06,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 16:57:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-21 16:57:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:57:06,275 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-21 16:57:06,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 51 [2022-11-21 16:57:06,284 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 24 treesize of output 26 [2022-11-21 16:57:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:57:06,750 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-11-21 16:57:06,750 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 42 [2022-11-21 16:57:06,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:57:06,758 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 21 treesize of output 15 [2022-11-21 16:57:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:07,205 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse3 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse1 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))) (and (forall ((v_ArrVal_1470 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1470)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) .cse1))) 4) 0)) (forall ((v_ArrVal_1470 Int) (v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1472) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1470)) |c_~#list~0.base|) .cse1)) 4) 0)))) is different from false [2022-11-21 16:57:08,865 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-21 16:57:08,865 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 2 case distinctions, treesize of input 103 treesize of output 99 [2022-11-21 16:57:08,890 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-21 16:57:08,891 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 2 case distinctions, treesize of input 65 treesize of output 80 [2022-11-21 16:57:08,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:57:08,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 307 treesize of output 321 [2022-11-21 16:57:09,084 INFO L321 Elim1Store]: treesize reduction 103, result has 67.5 percent of original size [2022-11-21 16:57:09,084 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 1951 treesize of output 1952 [2022-11-21 16:57:09,114 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 1726 treesize of output 1702 [2022-11-21 16:57:09,142 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 1702 treesize of output 1654 [2022-11-21 16:57:09,176 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 3577 treesize of output 3205 [2022-11-21 16:57:09,481 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 4