./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 --- 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-2329fc7 [2022-12-14 13:50:59,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:50:59,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:50:59,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:50:59,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:50:59,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:50:59,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:50:59,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:50:59,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:50:59,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:50:59,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:50:59,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:50:59,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:50:59,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:50:59,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:50:59,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:50:59,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:50:59,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:50:59,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:50:59,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:50:59,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:50:59,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:50:59,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:50:59,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:50:59,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:50:59,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:50:59,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:50:59,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:50:59,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:50:59,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:50:59,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:50:59,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:50:59,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:50:59,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:50:59,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:50:59,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:50:59,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:50:59,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:50:59,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:50:59,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:50:59,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:50:59,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:50:59,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:50:59,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:50:59,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:50:59,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:50:59,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:50:59,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:50:59,465 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:50:59,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:50:59,466 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:50:59,466 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:50:59,466 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:50:59,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:50:59,467 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:50:59,467 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:50:59,467 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:50:59,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:50:59,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:50:59,467 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:50:59,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:50:59,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:50:59,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:50:59,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:50:59,469 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:50:59,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:50:59,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:50:59,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:50:59,470 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:50:59,470 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:50:59,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:50:59,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:50:59,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:50:59,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:50:59,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:50:59,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:50:59,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:50:59,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:50:59,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:50:59,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:50:59,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:50:59,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:50:59,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:50:59,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:50:59,472 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_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 [2022-12-14 13:50:59,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:50:59,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:50:59,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:50:59,691 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:50:59,691 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:50:59,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety/test-0232-2.i [2022-12-14 13:51:02,273 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:51:02,485 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:51:02,486 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/sv-benchmarks/c/memsafety/test-0232-2.i [2022-12-14 13:51:02,495 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/data/d65605cc0/400595d42c1542ab8693523be4822bf4/FLAG439f816aa [2022-12-14 13:51:02,834 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/data/d65605cc0/400595d42c1542ab8693523be4822bf4 [2022-12-14 13:51:02,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:51:02,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:51:02,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:51:02,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:51:02,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:51:02,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:51:02" (1/1) ... [2022-12-14 13:51:02,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff1ec01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:02, skipping insertion in model container [2022-12-14 13:51:02,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:51:02" (1/1) ... [2022-12-14 13:51:02,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:51:02,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:51:03,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:51:03,056 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:51:03,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:51:03,097 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:51:03,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03 WrapperNode [2022-12-14 13:51:03,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:51:03,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:51:03,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:51:03,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:51:03,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,126 INFO L138 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-12-14 13:51:03,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:51:03,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:51:03,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:51:03,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:51:03,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,143 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:51:03,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:51:03,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:51:03,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:51:03,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (1/1) ... [2022-12-14 13:51:03,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:51:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:03,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:51:03,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:51:03,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 13:51:03,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:51:03,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:51:03,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:51:03,291 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:51:03,293 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:51:03,548 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:51:03,569 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:51:03,569 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:51:03,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:51:03 BoogieIcfgContainer [2022-12-14 13:51:03,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:51:03,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:51:03,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:51:03,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:51:03,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:51:02" (1/3) ... [2022-12-14 13:51:03,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e2ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:51:03, skipping insertion in model container [2022-12-14 13:51:03,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:03" (2/3) ... [2022-12-14 13:51:03,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e2ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:51:03, skipping insertion in model container [2022-12-14 13:51:03,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:51:03" (3/3) ... [2022-12-14 13:51:03,579 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-2.i [2022-12-14 13:51:03,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:51:03,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-12-14 13:51:03,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:51:03,632 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;@46d520b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:51:03,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-12-14 13:51:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 36 states have (on average 2.5) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:51:03,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:03,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:51:03,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 157798, now seen corresponding path program 1 times [2022-12-14 13:51:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:03,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286281195] [2022-12-14 13:51:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:03,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:03,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286281195] [2022-12-14 13:51:03,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286281195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:03,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:03,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:51:03,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884238334] [2022-12-14 13:51:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:03,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:51:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:51:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:51:03,953 INFO L87 Difference]: Start difference. First operand has 85 states, 36 states have (on average 2.5) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:04,087 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-12-14 13:51:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:51:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-12-14 13:51:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:04,095 INFO L225 Difference]: With dead ends: 95 [2022-12-14 13:51:04,095 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 13:51:04,096 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 [2022-12-14 13:51:04,098 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:04,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 51 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 13:51:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2022-12-14 13:51:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-12-14 13:51:04,125 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 3 [2022-12-14 13:51:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:04,125 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-12-14 13:51:04,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-12-14 13:51:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:51:04,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:04,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:51:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:51:04,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash 157799, now seen corresponding path program 1 times [2022-12-14 13:51:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:04,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996003053] [2022-12-14 13:51:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:04,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:04,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996003053] [2022-12-14 13:51:04,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996003053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:04,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:04,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:51:04,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321721821] [2022-12-14 13:51:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:04,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:51:04,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:04,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:51:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:51:04,242 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:04,424 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2022-12-14 13:51:04,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:51:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-12-14 13:51:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:04,426 INFO L225 Difference]: With dead ends: 156 [2022-12-14 13:51:04,426 INFO L226 Difference]: Without dead ends: 156 [2022-12-14 13:51:04,427 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 [2022-12-14 13:51:04,428 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 136 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:04,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 102 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:51:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-14 13:51:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2022-12-14 13:51:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-12-14 13:51:04,433 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 3 [2022-12-14 13:51:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:04,434 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-12-14 13:51:04,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-12-14 13:51:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:51:04,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:04,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:51:04,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:51:04,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 4891718, now seen corresponding path program 1 times [2022-12-14 13:51:04,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:04,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064150545] [2022-12-14 13:51:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:04,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:04,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064150545] [2022-12-14 13:51:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064150545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:04,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:04,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:51:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803975884] [2022-12-14 13:51:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:51:04,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:51:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:51:04,466 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:04,515 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-12-14 13:51:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:51:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:51:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:04,516 INFO L225 Difference]: With dead ends: 85 [2022-12-14 13:51:04,517 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 13:51:04,517 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 [2022-12-14 13:51:04,518 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:04,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:51:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 13:51:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-12-14 13:51:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-12-14 13:51:04,524 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 4 [2022-12-14 13:51:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:04,524 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-12-14 13:51:04,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-12-14 13:51:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:51:04,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:04,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:51:04,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:51:04,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash 4891719, now seen corresponding path program 1 times [2022-12-14 13:51:04,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:04,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160054422] [2022-12-14 13:51:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:04,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:04,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160054422] [2022-12-14 13:51:04,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160054422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:04,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:04,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:51:04,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39750981] [2022-12-14 13:51:04,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:04,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:51:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:51:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:51:04,583 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:04,632 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-12-14 13:51:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:51:04,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:51:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:04,633 INFO L225 Difference]: With dead ends: 72 [2022-12-14 13:51:04,633 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 13:51:04,633 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 [2022-12-14 13:51:04,635 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:04,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 35 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:51:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 13:51:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-12-14 13:51:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-12-14 13:51:04,640 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 4 [2022-12-14 13:51:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:04,640 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-12-14 13:51:04,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-12-14 13:51:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:51:04,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:04,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:04,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:51:04,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash -590037817, now seen corresponding path program 1 times [2022-12-14 13:51:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:04,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221235407] [2022-12-14 13:51:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:04,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:04,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:04,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221235407] [2022-12-14 13:51:04,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221235407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:04,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:04,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:51:04,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751279284] [2022-12-14 13:51:04,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:51:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:51:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:51:04,822 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:04,942 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-12-14 13:51:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:51:04,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 13:51:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:04,943 INFO L225 Difference]: With dead ends: 79 [2022-12-14 13:51:04,943 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 13:51:04,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:51:04,944 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 11 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:04,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 294 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 13:51:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-12-14 13:51:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-12-14 13:51:04,947 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 8 [2022-12-14 13:51:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:04,948 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-12-14 13:51:04,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-12-14 13:51:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:51:04,948 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:04,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:51:04,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash -590025684, now seen corresponding path program 1 times [2022-12-14 13:51:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551132950] [2022-12-14 13:51:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:05,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551132950] [2022-12-14 13:51:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551132950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:51:05,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550443958] [2022-12-14 13:51:05,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:05,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:51:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:51:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:51:05,032 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:05,117 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-12-14 13:51:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:51:05,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 13:51:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:05,117 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:51:05,118 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 13:51:05,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:51:05,118 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 226 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:05,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 36 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 13:51:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-12-14 13:51:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2022-12-14 13:51:05,124 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 8 [2022-12-14 13:51:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:05,124 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2022-12-14 13:51:05,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2022-12-14 13:51:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:51:05,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:05,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:05,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:51:05,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:05,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1415869557, now seen corresponding path program 1 times [2022-12-14 13:51:05,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:05,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052054075] [2022-12-14 13:51:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:05,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052054075] [2022-12-14 13:51:05,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052054075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:05,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:05,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:51:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627416371] [2022-12-14 13:51:05,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:05,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:51:05,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:51:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:51:05,242 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:05,344 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-12-14 13:51:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:51:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 13:51:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:05,345 INFO L225 Difference]: With dead ends: 81 [2022-12-14 13:51:05,345 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 13:51:05,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:51:05,346 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:05,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 73 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 13:51:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-12-14 13:51:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-12-14 13:51:05,349 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 13 [2022-12-14 13:51:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:05,349 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-12-14 13:51:05,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-12-14 13:51:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:51:05,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:05,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:05,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:51:05,350 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:05,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1415869556, now seen corresponding path program 1 times [2022-12-14 13:51:05,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447128141] [2022-12-14 13:51:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:05,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:05,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447128141] [2022-12-14 13:51:05,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447128141] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:05,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:51:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496495103] [2022-12-14 13:51:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:51:05,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:51:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:51:05,538 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:05,642 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2022-12-14 13:51:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:51:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 13:51:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:05,643 INFO L225 Difference]: With dead ends: 83 [2022-12-14 13:51:05,643 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 13:51:05,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:51:05,644 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:05,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 73 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 13:51:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2022-12-14 13:51:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.673913043478261) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-12-14 13:51:05,647 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 13 [2022-12-14 13:51:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:05,647 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-12-14 13:51:05,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-12-14 13:51:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:51:05,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:05,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:51:05,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash 854058774, now seen corresponding path program 1 times [2022-12-14 13:51:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:05,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651209138] [2022-12-14 13:51:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:05,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:05,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651209138] [2022-12-14 13:51:05,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651209138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:05,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:05,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:51:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149375743] [2022-12-14 13:51:05,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:05,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:51:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:51:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:51:05,697 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:05,770 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-12-14 13:51:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:51:05,770 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 13:51:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:05,771 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:51:05,771 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 13:51:05,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:51:05,772 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 15 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:05,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 120 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 13:51:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-14 13:51:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-12-14 13:51:05,776 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 15 [2022-12-14 13:51:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:05,776 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-12-14 13:51:05,776 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-12-14 13:51:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:51:05,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:05,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:05,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:51:05,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash 854058775, now seen corresponding path program 1 times [2022-12-14 13:51:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:05,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408368094] [2022-12-14 13:51:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:05,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:06,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408368094] [2022-12-14 13:51:06,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408368094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:06,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:06,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:51:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934270988] [2022-12-14 13:51:06,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:51:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:51:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:51:06,026 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:06,172 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-12-14 13:51:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:51:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 13:51:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:06,172 INFO L225 Difference]: With dead ends: 81 [2022-12-14 13:51:06,173 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 13:51:06,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:51:06,173 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:06,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 102 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 13:51:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2022-12-14 13:51:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-12-14 13:51:06,175 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2022-12-14 13:51:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:06,176 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-12-14 13:51:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-12-14 13:51:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:51:06,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:06,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:06,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:51:06,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:06,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:06,177 INFO L85 PathProgramCache]: Analyzing trace with hash 885607439, now seen corresponding path program 1 times [2022-12-14 13:51:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:06,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441042281] [2022-12-14 13:51:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:06,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:06,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441042281] [2022-12-14 13:51:06,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441042281] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:06,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:06,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:51:06,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514744649] [2022-12-14 13:51:06,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:06,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:51:06,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:06,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:51:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:51:06,245 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:06,317 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-12-14 13:51:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:51:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 13:51:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:06,318 INFO L225 Difference]: With dead ends: 64 [2022-12-14 13:51:06,318 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 13:51:06,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:51:06,319 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:06,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 76 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 13:51:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 13:51:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-12-14 13:51:06,322 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 15 [2022-12-14 13:51:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:06,322 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-12-14 13:51:06,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:06,322 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-12-14 13:51:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:51:06,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:06,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:51:06,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 706018255, now seen corresponding path program 1 times [2022-12-14 13:51:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580822854] [2022-12-14 13:51:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:06,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:06,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580822854] [2022-12-14 13:51:06,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580822854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:06,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:06,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:51:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879750521] [2022-12-14 13:51:06,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:51:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:51:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:51:06,650 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:07,021 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-12-14 13:51:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:51:07,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:51:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:07,023 INFO L225 Difference]: With dead ends: 122 [2022-12-14 13:51:07,023 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 13:51:07,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:51:07,024 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:07,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 139 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:51:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 13:51:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2022-12-14 13:51:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-12-14 13:51:07,026 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 16 [2022-12-14 13:51:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:07,026 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-12-14 13:51:07,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-12-14 13:51:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:51:07,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:07,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:07,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:51:07,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:07,027 INFO L85 PathProgramCache]: Analyzing trace with hash -890162009, now seen corresponding path program 1 times [2022-12-14 13:51:07,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:07,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914257428] [2022-12-14 13:51:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:07,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914257428] [2022-12-14 13:51:07,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914257428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268084208] [2022-12-14 13:51:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:07,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:07,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:51:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:07,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 13:51:07,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:07,469 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 11 treesize of output 7 [2022-12-14 13:51:07,512 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-12-14 13:51:07,513 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 [2022-12-14 13:51:07,578 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:51:07,578 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 33 treesize of output 24 [2022-12-14 13:51:07,635 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 13:51:07,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-12-14 13:51:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:07,721 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 38 treesize of output 34 [2022-12-14 13:51:07,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:07,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 255 [2022-12-14 13:51:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268084208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:51:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186858032] [2022-12-14 13:51:08,276 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 13:51:08,276 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:51:08,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:51:08,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:51:08,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:51:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:51:08,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:51:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 13:51:08,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 13:51:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-12-14 13:51:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:51:08,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:51:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:51:08,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:51:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-12-14 13:51:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2022-12-14 13:51:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,776 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:51:08,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 160 [2022-12-14 13:51:08,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 46 [2022-12-14 13:51:08,876 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:51:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:51:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:51:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:51:08,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-12-14 13:51:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 68 [2022-12-14 13:51:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:08,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:09,236 INFO L321 Elim1Store]: treesize reduction 190, result has 32.4 percent of original size [2022-12-14 13:51:09,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 344 treesize of output 407 [2022-12-14 13:51:11,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:11,270 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:51:11,270 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 15 treesize of output 15 [2022-12-14 13:51:11,276 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 1 [2022-12-14 13:51:11,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:11,297 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:51:11,298 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 15 treesize of output 15 [2022-12-14 13:51:11,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:51:13,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2267#(and (<= 0 |ULTIMATE.start_main_~#list~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem6#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_append_#in~plist#1.base|) (= (select |#valid| |ULTIMATE.start_append_~item~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem5#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_append_~item~0#1.offset|) (or (not (= |ULTIMATE.start_append_#t~mem5#1.base| 0)) (not (= |ULTIMATE.start_append_#t~mem5#1.offset| 0))) (not (= (select |#valid| |ULTIMATE.start_append_#t~mem6#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_append_~plist#1.base|) (<= |ULTIMATE.start_append_~item~0#1.offset| 0) (= |ULTIMATE.start_append_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (<= |ULTIMATE.start_append_#in~plist#1.offset| 0) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= 0 |ULTIMATE.start_append_~plist#1.offset|) (<= (+ |ULTIMATE.start_append_~item~0#1.offset| 4) (select |#length| |ULTIMATE.start_append_~item~0#1.base|)) (<= 0 |ULTIMATE.start_append_#in~plist#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_append_~plist#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 13:51:13,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:13,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:13,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-14 13:51:13,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650737799] [2022-12-14 13:51:13,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 13:51:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 13:51:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-12-14 13:51:13,179 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:13,620 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-12-14 13:51:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:51:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:51:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:13,621 INFO L225 Difference]: With dead ends: 88 [2022-12-14 13:51:13,621 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 13:51:13,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 13:51:13,622 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 200 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:13,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 218 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:51:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 13:51:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2022-12-14 13:51:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-12-14 13:51:13,624 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 16 [2022-12-14 13:51:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-12-14 13:51:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-12-14 13:51:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:51:13,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:13,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:13,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:51:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:51:13,826 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:13,827 INFO L85 PathProgramCache]: Analyzing trace with hash -890162008, now seen corresponding path program 1 times [2022-12-14 13:51:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:13,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145036705] [2022-12-14 13:51:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:14,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:14,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145036705] [2022-12-14 13:51:14,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145036705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435024629] [2022-12-14 13:51:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:14,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:14,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:51:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 13:51:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:14,266 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 11 treesize of output 7 [2022-12-14 13:51:14,272 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 11 treesize of output 7 [2022-12-14 13:51:14,299 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 13:51:14,299 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 [2022-12-14 13:51:14,304 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 16 treesize of output 18 [2022-12-14 13:51:14,363 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:51:14,363 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 23 treesize of output 18 [2022-12-14 13:51:14,372 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:51:14,372 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 33 treesize of output 24 [2022-12-14 13:51:14,431 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 13:51:14,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-12-14 13:51:14,436 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 13:51:14,437 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 26 treesize of output 10 [2022-12-14 13:51:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:14,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:16,594 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 28 [2022-12-14 13:51:16,605 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 66 treesize of output 62 [2022-12-14 13:51:16,608 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 102 treesize of output 94 [2022-12-14 13:51:30,895 WARN L233 SmtUtils]: Spent 14.20s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:51:30,909 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 64 treesize of output 60 [2022-12-14 13:51:30,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:30,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 100 [2022-12-14 13:51:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:31,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435024629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:51:31,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064166450] [2022-12-14 13:51:31,019 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 13:51:31,019 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:51:31,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:51:31,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:51:31,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:51:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:51:31,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:51:31,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 13:51:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 13:51:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-12-14 13:51:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 13:51:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:51:31,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:51:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:51:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-12-14 13:51:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 78 [2022-12-14 13:51:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,371 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:51:31,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 330 treesize of output 180 [2022-12-14 13:51:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,411 INFO L321 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-12-14 13:51:31,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 249 [2022-12-14 13:51:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:31,464 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:51:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:51:31,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:51:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 13:51:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-12-14 13:51:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 13:51:31,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:31,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:51:31,755 INFO L321 Elim1Store]: treesize reduction 190, result has 32.4 percent of original size [2022-12-14 13:51:31,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 344 treesize of output 407 [2022-12-14 13:51:33,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:33,032 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:51:33,033 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 15 treesize of output 15 [2022-12-14 13:51:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:33,043 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:51:33,043 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 15 treesize of output 15 [2022-12-14 13:51:33,047 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 1 [2022-12-14 13:51:33,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:51:34,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2565#(and (<= 0 |ULTIMATE.start_main_~#list~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem6#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_append_#in~plist#1.base|) (or (not (<= (+ |ULTIMATE.start_append_#t~mem6#1.offset| 8) (select |#length| |ULTIMATE.start_append_#t~mem6#1.base|))) (not (<= 0 (+ |ULTIMATE.start_append_#t~mem6#1.offset| 4)))) (= (select |#valid| |ULTIMATE.start_append_~item~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem5#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_append_~item~0#1.offset|) (or (not (= |ULTIMATE.start_append_#t~mem5#1.base| 0)) (not (= |ULTIMATE.start_append_#t~mem5#1.offset| 0))) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_append_~plist#1.base|) (<= |ULTIMATE.start_append_~item~0#1.offset| 0) (= |ULTIMATE.start_append_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (<= |ULTIMATE.start_append_#in~plist#1.offset| 0) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= 0 |ULTIMATE.start_append_~plist#1.offset|) (<= (+ |ULTIMATE.start_append_~item~0#1.offset| 4) (select |#length| |ULTIMATE.start_append_~item~0#1.base|)) (<= 0 |ULTIMATE.start_append_#in~plist#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_append_~plist#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 13:51:34,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:34,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:34,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-14 13:51:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775469335] [2022-12-14 13:51:34,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 13:51:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 13:51:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:51:34,898 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:35,757 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2022-12-14 13:51:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:51:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:51:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:35,759 INFO L225 Difference]: With dead ends: 99 [2022-12-14 13:51:35,759 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 13:51:35,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:51:35,760 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 244 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:35,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 339 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:51:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 13:51:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2022-12-14 13:51:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-12-14 13:51:35,762 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 16 [2022-12-14 13:51:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:35,762 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-12-14 13:51:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-12-14 13:51:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:51:35,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:35,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:35,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:51:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:51:35,965 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:35,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash 411729526, now seen corresponding path program 1 times [2022-12-14 13:51:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:35,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875037235] [2022-12-14 13:51:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:36,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875037235] [2022-12-14 13:51:36,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875037235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:36,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:36,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:51:36,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979913472] [2022-12-14 13:51:36,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:36,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:51:36,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:36,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:51:36,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:51:36,262 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:36,634 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-12-14 13:51:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:51:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 13:51:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:36,635 INFO L225 Difference]: With dead ends: 117 [2022-12-14 13:51:36,635 INFO L226 Difference]: Without dead ends: 117 [2022-12-14 13:51:36,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:51:36,635 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 209 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:36,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 100 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:51:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-12-14 13:51:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2022-12-14 13:51:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-12-14 13:51:36,637 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 17 [2022-12-14 13:51:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:36,637 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-12-14 13:51:36,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-12-14 13:51:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:51:36,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:36,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 13:51:36,638 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash -121286479, now seen corresponding path program 1 times [2022-12-14 13:51:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:36,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608068224] [2022-12-14 13:51:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:36,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608068224] [2022-12-14 13:51:36,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608068224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:36,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:36,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:51:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508421385] [2022-12-14 13:51:36,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:36,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:51:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:51:36,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:51:36,962 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:37,267 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-12-14 13:51:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:51:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 13:51:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:37,268 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:51:37,268 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 13:51:37,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:51:37,269 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 137 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:37,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 117 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:51:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 13:51:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-12-14 13:51:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-12-14 13:51:37,271 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 18 [2022-12-14 13:51:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:37,272 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-12-14 13:51:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-12-14 13:51:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:51:37,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:37,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 13:51:37,272 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 535086553, now seen corresponding path program 1 times [2022-12-14 13:51:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:37,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169220564] [2022-12-14 13:51:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:37,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169220564] [2022-12-14 13:51:37,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169220564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:37,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:37,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:51:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428952272] [2022-12-14 13:51:37,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:37,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:51:37,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:51:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:51:37,387 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:37,470 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-12-14 13:51:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:51:37,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 13:51:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:37,471 INFO L225 Difference]: With dead ends: 73 [2022-12-14 13:51:37,471 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 13:51:37,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:51:37,472 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:37,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 28 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 13:51:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-12-14 13:51:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-12-14 13:51:37,474 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 19 [2022-12-14 13:51:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-12-14 13:51:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-12-14 13:51:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:51:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:37,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 13:51:37,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash 535086554, now seen corresponding path program 1 times [2022-12-14 13:51:37,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:37,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200795552] [2022-12-14 13:51:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:37,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200795552] [2022-12-14 13:51:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200795552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:37,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:51:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533380874] [2022-12-14 13:51:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:51:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:51:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:51:37,510 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:37,547 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2022-12-14 13:51:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:51:37,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 13:51:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:37,548 INFO L225 Difference]: With dead ends: 67 [2022-12-14 13:51:37,548 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 13:51:37,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:51:37,549 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:37,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:51:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 13:51:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-12-14 13:51:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.320754716981132) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-12-14 13:51:37,551 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 19 [2022-12-14 13:51:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:37,551 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-12-14 13:51:37,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-12-14 13:51:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:51:37,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:37,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 13:51:37,552 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash -592185995, now seen corresponding path program 1 times [2022-12-14 13:51:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:37,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229069533] [2022-12-14 13:51:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:37,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229069533] [2022-12-14 13:51:37,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229069533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:37,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:37,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:51:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135840621] [2022-12-14 13:51:37,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:37,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:51:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:51:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:51:37,639 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:37,700 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-12-14 13:51:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:51:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 13:51:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:37,701 INFO L225 Difference]: With dead ends: 66 [2022-12-14 13:51:37,701 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 13:51:37,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:51:37,701 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:37,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 62 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:51:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 13:51:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-12-14 13:51:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-12-14 13:51:37,703 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 20 [2022-12-14 13:51:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:37,703 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-12-14 13:51:37,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-12-14 13:51:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:51:37,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:37,703 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] [2022-12-14 13:51:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 13:51:37,703 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1177896551, now seen corresponding path program 1 times [2022-12-14 13:51:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436824099] [2022-12-14 13:51:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:37,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436824099] [2022-12-14 13:51:37,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436824099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:37,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:37,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:51:37,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292395846] [2022-12-14 13:51:37,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:51:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:51:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:51:37,791 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:37,863 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-12-14 13:51:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:51:37,864 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), 0 states have call successors, (0), 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 21 [2022-12-14 13:51:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:37,864 INFO L225 Difference]: With dead ends: 65 [2022-12-14 13:51:37,864 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:51:37,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:51:37,865 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:37,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:51:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-14 13:51:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-12-14 13:51:37,867 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 21 [2022-12-14 13:51:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:37,867 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-12-14 13:51:37,868 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-12-14 13:51:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:51:37,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:37,868 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] [2022-12-14 13:51:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 13:51:37,868 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2139912695, now seen corresponding path program 1 times [2022-12-14 13:51:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:37,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876829394] [2022-12-14 13:51:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:38,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876829394] [2022-12-14 13:51:38,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876829394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:38,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:38,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 13:51:38,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035133764] [2022-12-14 13:51:38,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:38,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:51:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:51:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:51:38,319 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:38,642 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-12-14 13:51:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:51:38,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 13:51:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:38,643 INFO L225 Difference]: With dead ends: 72 [2022-12-14 13:51:38,643 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 13:51:38,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:51:38,644 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:38,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 125 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 13:51:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-12-14 13:51:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.263157894736842) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-12-14 13:51:38,645 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 22 [2022-12-14 13:51:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:38,645 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-12-14 13:51:38,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-12-14 13:51:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:51:38,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:38,646 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] [2022-12-14 13:51:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 13:51:38,646 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1912784220, now seen corresponding path program 1 times [2022-12-14 13:51:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:38,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926022817] [2022-12-14 13:51:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:38,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:38,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:38,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926022817] [2022-12-14 13:51:38,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926022817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:51:38,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:51:38,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:51:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110600621] [2022-12-14 13:51:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:51:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:51:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:51:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:51:38,781 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:38,880 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-12-14 13:51:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:51:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-12-14 13:51:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:38,881 INFO L225 Difference]: With dead ends: 68 [2022-12-14 13:51:38,881 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 13:51:38,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:51:38,882 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:38,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 41 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:51:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 13:51:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 13:51:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-12-14 13:51:38,884 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 23 [2022-12-14 13:51:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:38,884 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-12-14 13:51:38,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-12-14 13:51:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 13:51:38,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:38,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 13:51:38,885 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-14 13:51:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1378113711, now seen corresponding path program 1 times [2022-12-14 13:51:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:38,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050812770] [2022-12-14 13:51:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:39,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:39,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050812770] [2022-12-14 13:51:39,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050812770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:39,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196645897] [2022-12-14 13:51:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:39,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:39,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:39,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:39,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494939d-655e-465a-9a0e-f0b5341f135c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:51:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 13:51:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:39,739 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 [2022-12-14 13:51:39,764 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:51:39,764 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 [2022-12-14 13:51:39,836 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 13 treesize of output 9 [2022-12-14 13:51:39,873 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 11 treesize of output 7 [2022-12-14 13:51:39,877 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 23 treesize of output 22 [2022-12-14 13:51:39,925 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-12-14 13:51:39,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 13:51:40,024 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2022-12-14 13:51:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-12-14 13:51:40,145 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 0 case distinctions, treesize of input 46 treesize of output 22 [2022-12-14 13:51:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:40,281 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:51:40,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-14 13:51:40,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:51:40,377 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:51:40,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2022-12-14 13:51:40,516 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 50 treesize of output 30 [2022-12-14 13:51:40,585 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-14 13:51:40,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 24 [2022-12-14 13:51:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:51:40,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:40,637 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 80 treesize of output 76 [2022-12-14 13:51:46,770 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:51:57,373 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 855 treesize of output 839 [2022-12-14 13:52:04,224 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 89 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:52:06,624 INFO L321 Elim1Store]: treesize reduction 222, result has 73.7 percent of original size [2022-12-14 13:52:06,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 1622032 treesize of output 1536884 [2022-12-14 13:54:40,146 WARN L233 SmtUtils]: Spent 2.56m on a formula simplification. DAG size of input: 2436 DAG size of output: 2310 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 13:54:45,228 INFO L321 Elim1Store]: treesize reduction 8, result has 90.1 percent of original size [2022-12-14 13:54:45,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 966613 treesize of output 966675 [2022-12-14 13:55:21,127 WARN L233 SmtUtils]: Spent 21.81s on a formula simplification. DAG size of input: 2116 DAG size of output: 2116 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 13:55:38,504 WARN L233 SmtUtils]: Spent 8.76s on a formula simplification that was a NOOP. DAG size: 2114 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 13:58:48,418 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification that was a NOOP. DAG size: 2110 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 13:59:05,748 WARN L233 SmtUtils]: Spent 8.67s on a formula simplification that was a NOOP. DAG size: 2106 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)