./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- 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-e04fb08 [2022-11-16 12:03:04,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:03:04,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:03:04,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:03:04,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:03:04,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:03:04,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:03:04,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:03:04,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:03:04,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:03:04,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:03:04,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:03:04,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:03:04,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:03:04,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:03:04,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:03:04,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:03:04,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:03:04,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:03:04,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:03:04,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:03:04,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:03:04,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:03:04,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:03:04,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:03:04,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:03:04,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:03:04,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:03:04,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:03:04,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:03:04,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:03:04,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:03:04,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:03:04,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:03:04,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:03:04,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:03:04,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:03:04,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:03:04,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:03:04,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:03:04,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:03:04,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:03:04,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:03:04,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:03:04,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:03:04,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:03:04,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:03:04,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:03:04,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:03:04,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:03:04,574 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:03:04,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:03:04,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:03:04,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:03:04,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:03:04,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:03:04,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:03:04,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:03:04,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:03:04,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:03:04,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:03:04,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:03:04,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:03:04,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:03:04,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:03:04,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:03:04,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:03:04,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:03:04,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:03:04,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:03:04,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:03:04,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:03:04,579 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:03:04,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:03:04,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:03:04,580 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_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2022-11-16 12:03:04,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:03:04,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:03:04,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:03:04,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:03:04,935 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:03:04,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-16 12:03:05,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/data/f32357f7b/91e52c66245e4bc3844f8128336f83ff/FLAG18054e6b0 [2022-11-16 12:03:05,633 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:03:05,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-16 12:03:05,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/data/f32357f7b/91e52c66245e4bc3844f8128336f83ff/FLAG18054e6b0 [2022-11-16 12:03:05,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/data/f32357f7b/91e52c66245e4bc3844f8128336f83ff [2022-11-16 12:03:05,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:03:05,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:03:05,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:03:05,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:03:05,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:03:05,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:05" (1/1) ... [2022-11-16 12:03:05,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6147bc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:05, skipping insertion in model container [2022-11-16 12:03:05,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:05" (1/1) ... [2022-11-16 12:03:05,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:03:05,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:03:06,297 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-16 12:03:06,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:03:06,333 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:03:06,401 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-16 12:03:06,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:03:06,458 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:03:06,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06 WrapperNode [2022-11-16 12:03:06,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:03:06,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:03:06,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:03:06,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:03:06,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,507 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-11-16 12:03:06,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:03:06,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:03:06,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:03:06,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:03:06,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:03:06,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:03:06,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:03:06,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:03:06,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (1/1) ... [2022-11-16 12:03:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:03:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:06,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:03:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:03:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-16 12:03:06,640 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-16 12:03:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:03:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:03:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:03:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:03:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:03:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-16 12:03:06,644 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-16 12:03:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:03:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:03:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-16 12:03:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-16 12:03:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:03:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-16 12:03:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-16 12:03:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:03:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:03:06,808 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:03:06,810 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:03:07,392 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:03:07,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:03:07,411 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-16 12:03:07,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:07 BoogieIcfgContainer [2022-11-16 12:03:07,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:03:07,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:03:07,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:03:07,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:03:07,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:03:05" (1/3) ... [2022-11-16 12:03:07,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daba8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:03:07, skipping insertion in model container [2022-11-16 12:03:07,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:06" (2/3) ... [2022-11-16 12:03:07,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daba8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:03:07, skipping insertion in model container [2022-11-16 12:03:07,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:07" (3/3) ... [2022-11-16 12:03:07,427 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2022-11-16 12:03:07,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:03:07,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:03:07,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:03:07,527 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@67c35f8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:03:07,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:03:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 12:03:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:03:07,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:07,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:07,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2022-11-16 12:03:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185588407] [2022-11-16 12:03:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:07,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185588407] [2022-11-16 12:03:07,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185588407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:07,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:03:07,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:03:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452805102] [2022-11-16 12:03:07,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:07,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:03:07,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:03:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:03:07,945 INFO L87 Difference]: Start difference. First operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:08,014 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2022-11-16 12:03:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:03:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:03:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:08,026 INFO L225 Difference]: With dead ends: 188 [2022-11-16 12:03:08,026 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:03:08,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:03:08,038 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:08,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:03:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:03:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 12:03:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 75 states have internal predecessors, (83), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:03:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-11-16 12:03:08,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2022-11-16 12:03:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:08,086 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-11-16 12:03:08,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-11-16 12:03:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 12:03:08,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:08,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:08,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:03:08,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807145, now seen corresponding path program 1 times [2022-11-16 12:03:08,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:08,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449275413] [2022-11-16 12:03:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:09,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:03:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:09,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:03:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:10,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:03:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:10,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449275413] [2022-11-16 12:03:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449275413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707548147] [2022-11-16 12:03:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:10,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:10,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:10,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:10,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:03:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 12:03:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:11,080 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 14 treesize of output 12 [2022-11-16 12:03:11,337 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:03:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:03:11,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:03:11,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:03:11,487 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-16 12:03:11,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-11-16 12:03:11,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-16 12:03:11,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 12:03:11,756 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 20 treesize of output 8 [2022-11-16 12:03:11,954 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_328 (Array Int Int)) (v_ArrVal_327 (Array Int Int)) (v_ArrVal_329 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_327) |chain_node_~node~0#1.base| v_ArrVal_328) |c_chain_node_#in~ppnode#1.base| v_ArrVal_329) |c_#memory_$Pointer$.base|) (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-16 12:03:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:12,041 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:03:12,041 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 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-16 12:03:12,046 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 9 treesize of output 7 [2022-11-16 12:03:12,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-16 12:03:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-16 12:03:12,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:12,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707548147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:12,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:12,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-11-16 12:03:12,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122866188] [2022-11-16 12:03:12,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:12,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:03:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:03:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=479, Unknown=11, NotChecked=44, Total=600 [2022-11-16 12:03:12,358 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:03:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:14,139 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-11-16 12:03:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:03:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-11-16 12:03:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:14,144 INFO L225 Difference]: With dead ends: 150 [2022-11-16 12:03:14,145 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 12:03:14,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=918, Unknown=13, NotChecked=62, Total=1122 [2022-11-16 12:03:14,149 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 206 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:14,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 650 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1121 Invalid, 0 Unknown, 252 Unchecked, 1.2s Time] [2022-11-16 12:03:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 12:03:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 108. [2022-11-16 12:03:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 93 states have internal predecessors, (104), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:03:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2022-11-16 12:03:14,186 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 40 [2022-11-16 12:03:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:14,187 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2022-11-16 12:03:14,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:03:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2022-11-16 12:03:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:03:14,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:14,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:14,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:14,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:14,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:14,397 INFO L85 PathProgramCache]: Analyzing trace with hash -727961485, now seen corresponding path program 1 times [2022-11-16 12:03:14,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:14,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686678385] [2022-11-16 12:03:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:15,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:03:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:03:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:16,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:03:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:03:16,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:16,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686678385] [2022-11-16 12:03:16,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686678385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385825304] [2022-11-16 12:03:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:16,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:16,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:16,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:03:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 12:03:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:16,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:03:16,803 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:03:16,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:03:16,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:03:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:03:16,854 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 66 treesize of output 19 [2022-11-16 12:03:16,859 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 9 treesize of output 7 [2022-11-16 12:03:17,080 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:03:17,080 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 24 treesize of output 19 [2022-11-16 12:03:17,150 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:03:17,151 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 20 treesize of output 8 [2022-11-16 12:03:17,306 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_645 (Array Int Int)) (v_ArrVal_644 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (v_ArrVal_643 (Array Int Int))) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_643) |chain_node_~node~0#1.base| v_ArrVal_644) |c_chain_node_#in~ppnode#1.base| v_ArrVal_645) |c_#memory_$Pointer$.base|))) is different from true [2022-11-16 12:03:17,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:17,416 INFO L321 Elim1Store]: treesize reduction 43, result has 47.6 percent of original size [2022-11-16 12:03:17,417 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 4 case distinctions, treesize of input 32 treesize of output 57 [2022-11-16 12:03:17,448 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 6 treesize of output 4 [2022-11-16 12:03:17,563 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 19 treesize of output 21 [2022-11-16 12:03:17,657 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 12 treesize of output 8 [2022-11-16 12:03:17,813 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_649 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_650 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_649) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_650) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-16 12:03:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:17,905 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-16 12:03:17,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 101 [2022-11-16 12:03:17,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:03:17,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:03:17,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:03:18,089 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-16 12:03:18,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2022-11-16 12:03:18,099 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 29 treesize of output 21 [2022-11-16 12:03:18,151 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 12:03:18,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:18,502 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 82 treesize of output 54 [2022-11-16 12:03:18,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:03:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-16 12:03:18,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:18,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385825304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:18,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:18,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 29 [2022-11-16 12:03:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501083628] [2022-11-16 12:03:18,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:03:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:03:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=671, Unknown=5, NotChecked=106, Total=870 [2022-11-16 12:03:18,733 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:03:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:20,311 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2022-11-16 12:03:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:03:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-16 12:03:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:20,313 INFO L225 Difference]: With dead ends: 137 [2022-11-16 12:03:20,313 INFO L226 Difference]: Without dead ends: 134 [2022-11-16 12:03:20,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=168, Invalid=1317, Unknown=5, NotChecked=150, Total=1640 [2022-11-16 12:03:20,316 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 148 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:20,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 739 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1048 Invalid, 0 Unknown, 384 Unchecked, 1.0s Time] [2022-11-16 12:03:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-16 12:03:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2022-11-16 12:03:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 104 states have internal predecessors, (115), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:03:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2022-11-16 12:03:20,364 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 42 [2022-11-16 12:03:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:20,365 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2022-11-16 12:03:20,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:03:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2022-11-16 12:03:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:03:20,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:20,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:20,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:20,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 12:03:20,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:20,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1343975071, now seen corresponding path program 1 times [2022-11-16 12:03:20,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:20,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180254707] [2022-11-16 12:03:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:20,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:22,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:03:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:03:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:03:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:25,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:25,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180254707] [2022-11-16 12:03:25,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180254707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:25,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742554385] [2022-11-16 12:03:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:25,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:25,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:25,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:25,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:03:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-16 12:03:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:25,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-16 12:03:26,151 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:03:26,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:03:26,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:03:26,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:03:26,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:03:26,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:03:26,209 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 51 treesize of output 9 [2022-11-16 12:03:26,214 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 9 treesize of output 7 [2022-11-16 12:03:26,436 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 15 treesize of output 17 [2022-11-16 12:03:26,532 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 8 treesize of output 4 [2022-11-16 12:03:26,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:03:26,862 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:03:26,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:03:26,874 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 8 treesize of output 7 [2022-11-16 12:03:26,887 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 12 treesize of output 11 [2022-11-16 12:03:26,934 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 42 treesize of output 15 [2022-11-16 12:03:26,941 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 9 treesize of output 7 [2022-11-16 12:03:27,017 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 26 treesize of output 22 [2022-11-16 12:03:27,036 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 12:03:27,036 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 29 [2022-11-16 12:03:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:27,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2022-11-16 12:03:27,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:03:27,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 12:03:27,566 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-16 12:03:27,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 45 [2022-11-16 12:03:27,595 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:03:27,596 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 32 treesize of output 27 [2022-11-16 12:03:27,782 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:03:27,782 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 28 treesize of output 16 [2022-11-16 12:03:27,795 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-16 12:03:27,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 23 [2022-11-16 12:03:27,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-16 12:03:28,117 WARN L855 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_982 (Array Int Int)) (|chain_node_~node~0#1.offset| Int) (v_ArrVal_983 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_982 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_982) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) |c_#memory_$Pointer$.base|) (= (let ((.cse1 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_983 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_983) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse1 |c_chain_node_#in~ppnode#1.base| (store (select .cse1 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.offset|))) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:03:28,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:28,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:28,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:28,235 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-16 12:03:28,236 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 2 case distinctions, treesize of input 49 treesize of output 57 [2022-11-16 12:03:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:28,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:28,296 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-16 12:03:28,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 88 [2022-11-16 12:03:28,318 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 10 treesize of output 9 [2022-11-16 12:03:28,334 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 10 treesize of output 9 [2022-11-16 12:03:28,355 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-11-16 12:03:28,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:03:28,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 12:03:28,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 12:03:28,445 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 0 case distinctions, treesize of input 79 treesize of output 67 [2022-11-16 12:03:28,794 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2022-11-16 12:03:29,524 INFO L321 Elim1Store]: treesize reduction 16, result has 82.8 percent of original size [2022-11-16 12:03:29,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 241 [2022-11-16 12:03:32,703 INFO L321 Elim1Store]: treesize reduction 68, result has 78.3 percent of original size [2022-11-16 12:03:32,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 174 treesize of output 326 [2022-11-16 12:03:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-16 12:03:35,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:36,662 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~node~0#1.offset_10| Int) (|v_chain_node_~node~0#1.base_10| Int) (v_ArrVal_1013 (Array Int Int)) (v_ArrVal_1012 (Array Int Int))) (or (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_10|) 0)) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_10| (store v_ArrVal_1012 |v_chain_node_~node~0#1.offset_10| (select (select (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_10| v_ArrVal_1012) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))))) (store .cse1 |c_ULTIMATE.start_create_sll_~#list~0#1.base| (store (select .cse1 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset| |v_chain_node_~node~0#1.base_10|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_10| (store v_ArrVal_1013 |v_chain_node_~node~0#1.offset_10| (select (select (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_10| v_ArrVal_1013) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))))) (store .cse2 |c_ULTIMATE.start_create_sll_~#list~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset| |v_chain_node_~node~0#1.offset_10|))) |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) 0)) (not (< |v_chain_node_~node~0#1.base_10| |c_#StackHeapBarrier|)))) is different from false [2022-11-16 12:03:36,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742554385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:36,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:36,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 39 [2022-11-16 12:03:36,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4151311] [2022-11-16 12:03:36,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:03:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:03:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1618, Unknown=2, NotChecked=162, Total=1892 [2022-11-16 12:03:36,673 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 39 states, 31 states have (on average 2.193548387096774) internal successors, (68), 34 states have internal predecessors, (68), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:03:41,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:41,751 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2022-11-16 12:03:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:03:41,752 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 2.193548387096774) internal successors, (68), 34 states have internal predecessors, (68), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2022-11-16 12:03:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:41,753 INFO L225 Difference]: With dead ends: 180 [2022-11-16 12:03:41,753 INFO L226 Difference]: Without dead ends: 177 [2022-11-16 12:03:41,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=230, Invalid=3316, Unknown=2, NotChecked=234, Total=3782 [2022-11-16 12:03:41,756 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 118 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 910 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:41,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1301 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1653 Invalid, 0 Unknown, 910 Unchecked, 1.9s Time] [2022-11-16 12:03:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-16 12:03:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2022-11-16 12:03:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 111 states have internal predecessors, (125), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:03:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2022-11-16 12:03:41,780 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 46 [2022-11-16 12:03:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:41,780 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2022-11-16 12:03:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 2.193548387096774) internal successors, (68), 34 states have internal predecessors, (68), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:03:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2022-11-16 12:03:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:03:41,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:41,783 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:41,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:03:41,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:41,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1320962275, now seen corresponding path program 1 times [2022-11-16 12:03:41,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054666328] [2022-11-16 12:03:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:03:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:43,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:03:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:43,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:03:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:03:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:03:44,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054666328] [2022-11-16 12:03:44,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054666328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102375123] [2022-11-16 12:03:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:44,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:44,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:44,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:44,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:03:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 12:03:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:44,330 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 14 treesize of output 12 [2022-11-16 12:03:44,529 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:03:44,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:03:44,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:03:44,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:03:44,569 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 66 treesize of output 19 [2022-11-16 12:03:44,573 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 9 treesize of output 7 [2022-11-16 12:03:44,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 12:03:44,822 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 20 treesize of output 8 [2022-11-16 12:03:44,971 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1405 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1405) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1404) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-16 12:03:45,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,015 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 34 treesize of output 32 [2022-11-16 12:03:45,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 12:03:45,172 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 26 treesize of output 14 [2022-11-16 12:03:45,331 WARN L855 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_1409 (Array Int Int)) (v_ArrVal_1408 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_1408 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1408) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1409)))) is different from true [2022-11-16 12:03:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,369 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 51 treesize of output 47 [2022-11-16 12:03:45,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-16 12:03:45,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 12:03:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:45,570 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 33 treesize of output 17 [2022-11-16 12:03:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-16 12:03:45,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:45,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102375123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:45,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:45,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2022-11-16 12:03:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381930973] [2022-11-16 12:03:45,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:45,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:03:45,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:03:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=767, Unknown=10, NotChecked=114, Total=992 [2022-11-16 12:03:45,868 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand has 31 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 12:03:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:47,450 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2022-11-16 12:03:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:03:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2022-11-16 12:03:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:47,453 INFO L225 Difference]: With dead ends: 206 [2022-11-16 12:03:47,453 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 12:03:47,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=1458, Unknown=10, NotChecked=158, Total=1806 [2022-11-16 12:03:47,455 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 215 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:47,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 622 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 991 Invalid, 0 Unknown, 568 Unchecked, 0.9s Time] [2022-11-16 12:03:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 12:03:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 161. [2022-11-16 12:03:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 125 states have (on average 1.232) internal successors, (154), 137 states have internal predecessors, (154), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 12:03:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 201 transitions. [2022-11-16 12:03:47,480 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 201 transitions. Word has length 49 [2022-11-16 12:03:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:47,481 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 201 transitions. [2022-11-16 12:03:47,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 12:03:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 201 transitions. [2022-11-16 12:03:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:03:47,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:47,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:47,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:47,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:47,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2055778686, now seen corresponding path program 1 times [2022-11-16 12:03:47,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629186203] [2022-11-16 12:03:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:47,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:49,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:03:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:03:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:49,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:03:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:52,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:03:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629186203] [2022-11-16 12:03:52,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629186203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434644479] [2022-11-16 12:03:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:52,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:52,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:52,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:03:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-16 12:03:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:52,560 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 14 treesize of output 12 [2022-11-16 12:03:52,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:03:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:52,765 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 16 treesize of output 17 [2022-11-16 12:03:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:52,775 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 16 treesize of output 17 [2022-11-16 12:03:52,865 INFO L321 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2022-11-16 12:03:52,865 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2022-11-16 12:03:52,924 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-16 12:03:52,924 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 53 [2022-11-16 12:03:53,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,327 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 32 [2022-11-16 12:03:53,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:53,343 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2022-11-16 12:03:53,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:53,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 27 [2022-11-16 12:03:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 12:03:53,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:03:53,685 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1746 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1741 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_1741 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1741) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1746) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_1742 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_1742) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:03:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,762 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-16 12:03:53,762 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 73 [2022-11-16 12:03:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:53,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2022-11-16 12:03:53,792 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 59 treesize of output 45 [2022-11-16 12:03:53,802 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 12 treesize of output 11 [2022-11-16 12:03:53,812 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 10 treesize of output 9 [2022-11-16 12:03:53,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 32 treesize of output 25 [2022-11-16 12:03:53,847 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:03:53,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 12:03:55,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:03:55,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:55,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 50 [2022-11-16 12:03:55,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:55,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:55,127 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:03:55,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-11-16 12:03:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-16 12:03:55,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:55,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434644479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:55,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:55,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-11-16 12:03:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313097466] [2022-11-16 12:03:55,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:03:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:03:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=621, Unknown=1, NotChecked=50, Total=756 [2022-11-16 12:03:55,839 INFO L87 Difference]: Start difference. First operand 161 states and 201 transitions. Second operand has 26 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 24 states have internal predecessors, (73), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 12:03:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:58,027 INFO L93 Difference]: Finished difference Result 196 states and 242 transitions. [2022-11-16 12:03:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:03:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 24 states have internal predecessors, (73), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 50 [2022-11-16 12:03:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:58,031 INFO L225 Difference]: With dead ends: 196 [2022-11-16 12:03:58,031 INFO L226 Difference]: Without dead ends: 193 [2022-11-16 12:03:58,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=152, Invalid=1110, Unknown=2, NotChecked=68, Total=1332 [2022-11-16 12:03:58,032 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 89 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:58,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 757 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 824 Invalid, 0 Unknown, 414 Unchecked, 1.0s Time] [2022-11-16 12:03:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-16 12:03:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2022-11-16 12:03:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 118 states have (on average 1.2118644067796611) internal successors, (143), 128 states have internal predecessors, (143), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:03:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2022-11-16 12:03:58,059 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 50 [2022-11-16 12:03:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:58,059 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2022-11-16 12:03:58,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 24 states have internal predecessors, (73), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 12:03:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2022-11-16 12:03:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:03:58,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:58,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:58,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:58,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:58,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1969592115, now seen corresponding path program 1 times [2022-11-16 12:03:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:58,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322558579] [2022-11-16 12:03:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:00,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:04:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:00,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:04:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:02,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:04:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:04:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:04,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322558579] [2022-11-16 12:04:04,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322558579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:04,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328953212] [2022-11-16 12:04:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:04,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:04,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:04:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 184 conjunts are in the unsatisfiable core [2022-11-16 12:04:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:05,114 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:04:05,114 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 23 treesize of output 19 [2022-11-16 12:04:05,369 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:04:05,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:04:05,400 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:04:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:04:05,409 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 8 treesize of output 7 [2022-11-16 12:04:05,419 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 8 treesize of output 7 [2022-11-16 12:04:05,434 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 8 treesize of output 7 [2022-11-16 12:04:05,444 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 12 treesize of output 11 [2022-11-16 12:04:05,488 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-11-16 12:04:05,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:04:05,574 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 0 case distinctions, treesize of input 35 treesize of output 9 [2022-11-16 12:04:05,578 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 9 treesize of output 7 [2022-11-16 12:04:05,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:04:05,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-16 12:04:05,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 12:04:06,053 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 11 treesize of output 3 [2022-11-16 12:04:06,058 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 15 treesize of output 7 [2022-11-16 12:04:06,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:04:06,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:06,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:06,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-16 12:04:06,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:06,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:06,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-16 12:04:06,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 12:04:06,662 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 16 treesize of output 15 [2022-11-16 12:04:06,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 12:04:06,695 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 12 treesize of output 11 [2022-11-16 12:04:07,020 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-16 12:04:07,021 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2022-11-16 12:04:07,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-11-16 12:04:07,233 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 12:04:07,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 25 [2022-11-16 12:04:07,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:04:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 12:04:07,589 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2105 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2102 (Array Int Int)) (v_ArrVal_2110 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_2102 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2102) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2105) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2110)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:04:07,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,687 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-16 12:04:07,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 82 [2022-11-16 12:04:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 56 [2022-11-16 12:04:07,740 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 10 treesize of output 9 [2022-11-16 12:04:07,749 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 60 treesize of output 46 [2022-11-16 12:04:07,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-16 12:04:07,779 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:04:07,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 12:04:09,516 INFO L321 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2022-11-16 12:04:09,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 53 [2022-11-16 12:04:09,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:09,540 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:04:09,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 28 [2022-11-16 12:04:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-16 12:04:09,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:10,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328953212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:10,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:10,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2022-11-16 12:04:10,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069467408] [2022-11-16 12:04:10,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:10,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:04:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:04:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1439, Unknown=1, NotChecked=76, Total=1640 [2022-11-16 12:04:10,346 INFO L87 Difference]: Start difference. First operand 149 states and 180 transitions. Second operand has 39 states, 32 states have (on average 2.40625) internal successors, (77), 34 states have internal predecessors, (77), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:04:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:12,493 INFO L93 Difference]: Finished difference Result 248 states and 300 transitions. [2022-11-16 12:04:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:04:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 2.40625) internal successors, (77), 34 states have internal predecessors, (77), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-11-16 12:04:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:12,496 INFO L225 Difference]: With dead ends: 248 [2022-11-16 12:04:12,496 INFO L226 Difference]: Without dead ends: 178 [2022-11-16 12:04:12,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=185, Invalid=2074, Unknown=1, NotChecked=92, Total=2352 [2022-11-16 12:04:12,499 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 88 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:12,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 913 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1137 Invalid, 0 Unknown, 311 Unchecked, 1.2s Time] [2022-11-16 12:04:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-16 12:04:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2022-11-16 12:04:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 135 states have (on average 1.2) internal successors, (162), 146 states have internal predecessors, (162), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 12:04:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 205 transitions. [2022-11-16 12:04:12,541 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 205 transitions. Word has length 50 [2022-11-16 12:04:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:12,542 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 205 transitions. [2022-11-16 12:04:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 2.40625) internal successors, (77), 34 states have internal predecessors, (77), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:04:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 205 transitions. [2022-11-16 12:04:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:04:12,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:12,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:12,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:12,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:12,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1872718035, now seen corresponding path program 1 times [2022-11-16 12:04:12,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:12,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993910084] [2022-11-16 12:04:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:12,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:13,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:04:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:13,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:04:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:14,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:04:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:14,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:04:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:04:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993910084] [2022-11-16 12:04:14,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993910084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:14,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738418327] [2022-11-16 12:04:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:14,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:14,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:14,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:04:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-16 12:04:15,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:15,180 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:04:15,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:04:15,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:04:15,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:04:15,216 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 66 treesize of output 19 [2022-11-16 12:04:15,226 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 9 treesize of output 7 [2022-11-16 12:04:15,388 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:04:15,388 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 24 treesize of output 19 [2022-11-16 12:04:15,448 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:04:15,448 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 20 treesize of output 8 [2022-11-16 12:04:15,591 WARN L855 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_2520 (Array Int Int)) (v_ArrVal_2518 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2520) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2518) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-16 12:04:15,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:15,641 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-16 12:04:15,642 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 2 case distinctions, treesize of input 34 treesize of output 44 [2022-11-16 12:04:15,655 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 22 treesize of output 17 [2022-11-16 12:04:15,682 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 15 treesize of output 12 [2022-11-16 12:04:15,875 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-16 12:04:15,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-16 12:04:16,031 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-16 12:04:16,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2022-11-16 12:04:16,130 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2525 (Array Int Int)) (v_ArrVal_2524 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2525) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2524) |c_#memory_$Pointer$.base|) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2022-11-16 12:04:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:16,206 INFO L321 Elim1Store]: treesize reduction 41, result has 48.1 percent of original size [2022-11-16 12:04:16,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 72 [2022-11-16 12:04:16,230 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 19 treesize of output 13 [2022-11-16 12:04:16,248 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 12 treesize of output 8 [2022-11-16 12:04:16,256 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-16 12:04:16,345 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 12 treesize of output 8 [2022-11-16 12:04:16,441 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2528 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2529 (Array Int Int))) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2529) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2528) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-16 12:04:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:16,492 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-16 12:04:16,492 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 2 case distinctions, treesize of input 27 treesize of output 41 [2022-11-16 12:04:16,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:04:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:16,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-16 12:04:16,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:04:16,665 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 42 treesize of output 30 [2022-11-16 12:04:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-16 12:04:16,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:16,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738418327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:16,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:16,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 31 [2022-11-16 12:04:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639812223] [2022-11-16 12:04:16,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:16,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:04:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:04:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=722, Unknown=4, NotChecked=168, Total=992 [2022-11-16 12:04:16,891 INFO L87 Difference]: Start difference. First operand 170 states and 205 transitions. Second operand has 31 states, 26 states have (on average 2.230769230769231) internal successors, (58), 28 states have internal predecessors, (58), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:04:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:18,265 INFO L93 Difference]: Finished difference Result 200 states and 242 transitions. [2022-11-16 12:04:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:04:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.230769230769231) internal successors, (58), 28 states have internal predecessors, (58), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 51 [2022-11-16 12:04:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:18,267 INFO L225 Difference]: With dead ends: 200 [2022-11-16 12:04:18,267 INFO L226 Difference]: Without dead ends: 197 [2022-11-16 12:04:18,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=1529, Unknown=4, NotChecked=246, Total=1980 [2022-11-16 12:04:18,269 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 200 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:18,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 684 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 856 Invalid, 0 Unknown, 535 Unchecked, 0.7s Time] [2022-11-16 12:04:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-16 12:04:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2022-11-16 12:04:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 157 states have internal predecessors, (175), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 12:04:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2022-11-16 12:04:18,302 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 51 [2022-11-16 12:04:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:18,303 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2022-11-16 12:04:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.230769230769231) internal successors, (58), 28 states have internal predecessors, (58), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:04:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2022-11-16 12:04:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:04:18,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:18,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:18,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:18,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1808852267, now seen corresponding path program 1 times [2022-11-16 12:04:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:18,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59261739] [2022-11-16 12:04:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:21,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:04:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:22,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:04:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:04:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:25,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:04:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:04:26,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59261739] [2022-11-16 12:04:26,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59261739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150166945] [2022-11-16 12:04:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:26,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:26,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:26,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:04:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:26,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 237 conjunts are in the unsatisfiable core [2022-11-16 12:04:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:26,453 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-16 12:04:26,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-16 12:04:26,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:04:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:26,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 12:04:26,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:26,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 12:04:26,929 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-16 12:04:26,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2022-11-16 12:04:26,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 28 treesize of output 31 [2022-11-16 12:04:26,984 INFO L321 Elim1Store]: treesize reduction 46, result has 34.3 percent of original size [2022-11-16 12:04:26,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 84 [2022-11-16 12:04:27,028 INFO L321 Elim1Store]: treesize reduction 19, result has 57.8 percent of original size [2022-11-16 12:04:27,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 81 [2022-11-16 12:04:27,037 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 12:04:27,080 INFO L321 Elim1Store]: treesize reduction 56, result has 34.9 percent of original size [2022-11-16 12:04:27,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 94 [2022-11-16 12:04:27,124 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 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-16 12:04:27,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:04:27,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 12:04:27,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 12:04:27,260 INFO L321 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2022-11-16 12:04:27,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 74 [2022-11-16 12:04:27,364 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 12:04:27,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 95 [2022-11-16 12:04:27,423 INFO L321 Elim1Store]: treesize reduction 44, result has 26.7 percent of original size [2022-11-16 12:04:27,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 22 [2022-11-16 12:04:27,455 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 12:04:27,455 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 3 case distinctions, treesize of input 40 treesize of output 15 [2022-11-16 12:04:27,499 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:04:27,500 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 7 [2022-11-16 12:04:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:04:27,532 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 55 treesize of output 33 [2022-11-16 12:04:27,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:04:27,545 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 33 treesize of output 35 [2022-11-16 12:04:27,580 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 88 treesize of output 68 [2022-11-16 12:04:27,840 INFO L321 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-11-16 12:04:27,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 106 [2022-11-16 12:04:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:28,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:28,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-16 12:04:28,329 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 12:04:28,329 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 53 [2022-11-16 12:04:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:28,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2022-11-16 12:04:28,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:04:28,525 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-11-16 12:04:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:28,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-11-16 12:04:29,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,333 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-16 12:04:29,333 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 61 [2022-11-16 12:04:29,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 48 [2022-11-16 12:04:29,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 55 treesize of output 42 [2022-11-16 12:04:29,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 12:04:29,386 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 16 treesize of output 15 [2022-11-16 12:04:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,419 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-16 12:04:29,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2022-11-16 12:04:29,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 12:04:29,894 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 12:04:29,895 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 80 [2022-11-16 12:04:29,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:29,952 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:04:29,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2022-11-16 12:04:30,260 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 12:04:30,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 55 [2022-11-16 12:04:30,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,280 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:04:30,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 16 [2022-11-16 12:04:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 12:04:30,580 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2887 (Array Int Int)) (v_ArrVal_2886 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2883 (Array Int Int)) (v_ArrVal_2893 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2887) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2893) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_2883 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2883) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2886) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:04:30,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,688 INFO L321 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2022-11-16 12:04:30,689 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 189 treesize of output 145 [2022-11-16 12:04:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,726 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:04:30,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-11-16 12:04:30,744 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 10 treesize of output 9 [2022-11-16 12:04:30,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-16 12:04:30,775 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 152 treesize of output 120 [2022-11-16 12:04:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:30,798 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-16 12:04:30,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2022-11-16 12:04:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:04:35,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:04:35,434 INFO L321 Elim1Store]: treesize reduction 74, result has 16.9 percent of original size [2022-11-16 12:04:35,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 237 treesize of output 119 [2022-11-16 12:04:35,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,469 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:04:35,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 30 [2022-11-16 12:04:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-16 12:04:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:07,134 WARN L233 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:05:19,024 WARN L233 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:05:30,816 WARN L233 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:05:32,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150166945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:32,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:32,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 49 [2022-11-16 12:05:32,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668261111] [2022-11-16 12:05:32,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:32,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:05:32,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:05:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2974, Unknown=8, NotChecked=110, Total=3306 [2022-11-16 12:05:32,158 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand has 49 states, 41 states have (on average 2.073170731707317) internal successors, (85), 45 states have internal predecessors, (85), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:05:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:36,741 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2022-11-16 12:05:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:05:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 41 states have (on average 2.073170731707317) internal successors, (85), 45 states have internal predecessors, (85), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2022-11-16 12:05:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:36,743 INFO L225 Difference]: With dead ends: 227 [2022-11-16 12:05:36,743 INFO L226 Difference]: Without dead ends: 224 [2022-11-16 12:05:36,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=324, Invalid=4364, Unknown=8, NotChecked=134, Total=4830 [2022-11-16 12:05:36,746 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 113 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 684 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:36,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1378 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1808 Invalid, 0 Unknown, 684 Unchecked, 2.6s Time] [2022-11-16 12:05:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-16 12:05:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 194. [2022-11-16 12:05:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 167 states have internal predecessors, (186), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 12:05:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 229 transitions. [2022-11-16 12:05:36,787 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 229 transitions. Word has length 53 [2022-11-16 12:05:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:36,788 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 229 transitions. [2022-11-16 12:05:36,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 41 states have (on average 2.073170731707317) internal successors, (85), 45 states have internal predecessors, (85), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:05:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 229 transitions. [2022-11-16 12:05:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:05:36,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:36,789 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:36,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:05:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:36,996 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 830072921, now seen corresponding path program 1 times [2022-11-16 12:05:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194665977] [2022-11-16 12:05:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:39,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:05:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:39,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:05:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:05:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:41,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:05:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:05:44,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:44,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194665977] [2022-11-16 12:05:44,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194665977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:44,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518699881] [2022-11-16 12:05:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:44,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:44,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:44,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:05:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:44,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-16 12:05:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:44,424 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 14 treesize of output 12 [2022-11-16 12:05:44,540 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:05:44,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:05:44,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:05:44,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:05:44,594 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-16 12:05:44,595 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2022-11-16 12:05:44,597 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 21 treesize of output 15 [2022-11-16 12:05:45,019 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 12:05:45,020 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 70 [2022-11-16 12:05:45,044 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 9 treesize of output 7 [2022-11-16 12:05:45,156 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 8 treesize of output 4 [2022-11-16 12:05:45,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:05:45,507 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:05:45,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:05:45,517 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 8 treesize of output 7 [2022-11-16 12:05:45,528 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 8 treesize of output 7 [2022-11-16 12:05:45,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:05:45,590 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 31 treesize of output 5 [2022-11-16 12:05:45,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:05:45,629 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:05:45,629 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 21 [2022-11-16 12:05:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:45,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:45,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-16 12:05:45,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 12:05:45,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:05:46,339 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 12:05:46,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 60 [2022-11-16 12:05:46,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:46,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:46,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 12:05:46,369 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 12 treesize of output 11 [2022-11-16 12:05:46,541 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 12:05:46,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 23 [2022-11-16 12:05:46,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-16 12:05:46,553 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 19 treesize of output 7 [2022-11-16 12:05:46,902 WARN L855 $PredicateComparison]: unable to prove that (exists ((|chain_node_~ppnode#1.offset| Int) (v_ArrVal_3320 (Array Int Int)) (v_ArrVal_3321 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3327 (Array Int Int)) (v_ArrVal_3328 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_3320 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3320) |c_chain_node_#in~ppnode#1.base|) |chain_node_~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3328) |c_#memory_$Pointer$.offset|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_3321 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3321) |c_chain_node_#in~ppnode#1.base|) |chain_node_~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3327)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:05:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:46,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:46,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:46,987 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-16 12:05:46,987 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-11-16 12:05:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,004 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 35 treesize of output 33 [2022-11-16 12:05:47,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:05:47,023 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 25 treesize of output 27 [2022-11-16 12:05:47,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:05:47,043 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 20 treesize of output 24 [2022-11-16 12:05:47,071 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-16 12:05:47,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 12:05:47,084 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 8 treesize of output 7 [2022-11-16 12:05:47,112 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 8 treesize of output 7 [2022-11-16 12:05:47,375 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:05:47,375 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 24 [2022-11-16 12:05:47,379 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 7 treesize of output 3 [2022-11-16 12:05:47,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-11-16 12:05:47,622 WARN L855 $PredicateComparison]: unable to prove that (exists ((|chain_node_~ppnode#1.offset| Int) (v_ArrVal_3333 (Array Int Int)) (v_ArrVal_3334 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3336 (Array Int Int)) (v_ArrVal_3339 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3336) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3339) |c_#memory_$Pointer$.base|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_3333 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3333) |c_chain_node_#in~ppnode#1.base|) |chain_node_~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3334)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:05:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,668 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 24 treesize of output 26 [2022-11-16 12:05:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:47,701 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-16 12:05:47,701 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 65 [2022-11-16 12:05:47,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:05:47,724 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 8 treesize of output 7 [2022-11-16 12:05:47,745 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-16 12:05:47,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 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 [2022-11-16 12:05:47,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:05:48,274 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:05:48,275 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 20 [2022-11-16 12:05:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 18 refuted. 2 times theorem prover too weak. 1 trivial. 10 not checked. [2022-11-16 12:05:48,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:48,446 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~ppnode#1.offset_29| Int) (|v_chain_node_~node~0#1.base_31| Int) (v_ArrVal_3355 (Array Int Int)) (v_ArrVal_3356 (Array Int Int)) (v_ArrVal_3357 (Array Int Int)) (v_ArrVal_3359 (Array Int Int)) (|v_chain_node_~node~0#1.offset_28| Int)) (or (not (< |v_chain_node_~node~0#1.base_31| |c_#StackHeapBarrier|)) (not (= (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_31| v_ArrVal_3356) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_3357))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_31| (store v_ArrVal_3359 |v_chain_node_~node~0#1.offset_28| (select (select (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_31| v_ArrVal_3359) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |v_chain_node_~ppnode#1.offset_29|))) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) 0)) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_31|) 0)))) is different from false [2022-11-16 12:05:48,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518699881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:48,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:48,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 47 [2022-11-16 12:05:48,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253724935] [2022-11-16 12:05:48,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:05:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:05:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1836, Unknown=10, NotChecked=264, Total=2256 [2022-11-16 12:05:48,451 INFO L87 Difference]: Start difference. First operand 194 states and 229 transitions. Second operand has 47 states, 40 states have (on average 2.1) internal successors, (84), 42 states have internal predecessors, (84), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:05:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:52,146 INFO L93 Difference]: Finished difference Result 243 states and 286 transitions. [2022-11-16 12:05:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:05:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 40 states have (on average 2.1) internal successors, (84), 42 states have internal predecessors, (84), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2022-11-16 12:05:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:52,149 INFO L225 Difference]: With dead ends: 243 [2022-11-16 12:05:52,149 INFO L226 Difference]: Without dead ends: 240 [2022-11-16 12:05:52,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=258, Invalid=3048, Unknown=12, NotChecked=342, Total=3660 [2022-11-16 12:05:52,151 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 139 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:52,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 947 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1396 Invalid, 0 Unknown, 683 Unchecked, 1.3s Time] [2022-11-16 12:05:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-16 12:05:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 198. [2022-11-16 12:05:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 171 states have internal predecessors, (192), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 12:05:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 235 transitions. [2022-11-16 12:05:52,195 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 235 transitions. Word has length 55 [2022-11-16 12:05:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:52,195 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 235 transitions. [2022-11-16 12:05:52,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 40 states have (on average 2.1) internal successors, (84), 42 states have internal predecessors, (84), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:05:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 235 transitions. [2022-11-16 12:05:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:05:52,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:52,197 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:52,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:52,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:05:52,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash 992893756, now seen corresponding path program 1 times [2022-11-16 12:05:52,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:52,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611842014] [2022-11-16 12:05:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:52,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:05:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:05:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:05:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:58,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:05:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:00,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:06:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:06:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:00,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611842014] [2022-11-16 12:06:00,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611842014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:00,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371097717] [2022-11-16 12:06:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:00,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:00,986 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:00,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:06:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 223 conjunts are in the unsatisfiable core [2022-11-16 12:06:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:01,442 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 14 treesize of output 12 [2022-11-16 12:06:01,595 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:06:01,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:06:01,603 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 8 treesize of output 7 [2022-11-16 12:06:01,610 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 8 treesize of output 7 [2022-11-16 12:06:01,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:06:01,661 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-11-16 12:06:01,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:06:01,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:06:02,001 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 7 treesize of output 3 [2022-11-16 12:06:02,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:06:02,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:02,154 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 16 treesize of output 17 [2022-11-16 12:06:02,323 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-16 12:06:02,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2022-11-16 12:06:02,381 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-16 12:06:02,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 73 [2022-11-16 12:06:02,394 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 8 treesize of output 7 [2022-11-16 12:06:02,420 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-16 12:06:02,450 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 27 treesize of output 24 [2022-11-16 12:06:02,501 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 123 treesize of output 97 [2022-11-16 12:06:02,533 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 126 treesize of output 100 [2022-11-16 12:06:02,646 INFO L321 Elim1Store]: treesize reduction 61, result has 7.6 percent of original size [2022-11-16 12:06:02,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 370 treesize of output 421 [2022-11-16 12:06:02,869 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-11-16 12:06:02,869 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 25 treesize of output 27 [2022-11-16 12:06:02,916 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-16 12:06:02,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 45 [2022-11-16 12:06:03,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:06:03,369 INFO L321 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2022-11-16 12:06:03,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 333 treesize of output 455 [2022-11-16 12:06:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:03,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:03,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 102 treesize of output 91 [2022-11-16 12:06:03,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:06:03,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:06:03,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:06:03,974 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 104 [2022-11-16 12:06:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:03,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 58 [2022-11-16 12:06:03,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:06:04,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-16 12:06:04,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:06:04,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 32 [2022-11-16 12:06:04,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 12:06:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:06:04,658 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3772 (Array Int Int)) (v_ArrVal_3773 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3778 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3773) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3778)) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_3772 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3772) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:06:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-11-16 12:06:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,772 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-16 12:06:04,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:06:04,783 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 49 treesize of output 37 [2022-11-16 12:06:04,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 12:06:04,831 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-16 12:06:04,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 12:06:04,844 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 8 treesize of output 7 [2022-11-16 12:06:05,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:06:05,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 33 [2022-11-16 12:06:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2022-11-16 12:06:05,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:06:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2022-11-16 12:06:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,803 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-16 12:06:05,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 84 [2022-11-16 12:06:05,838 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-16 12:06:05,839 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 [2022-11-16 12:06:05,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2022-11-16 12:06:05,863 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 14 treesize of output 13 [2022-11-16 12:06:05,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-16 12:06:05,883 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 12 treesize of output 11 [2022-11-16 12:06:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:06:08,596 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:06:08,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 98 [2022-11-16 12:06:08,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,661 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-11-16 12:06:08,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 71 treesize of output 39 [2022-11-16 12:06:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-16 12:06:08,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:27,015 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:06:39,533 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:06:50,053 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:06:51,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371097717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:51,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:51,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30] total 47 [2022-11-16 12:06:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651554464] [2022-11-16 12:06:51,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:51,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:06:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:06:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2537, Unknown=5, NotChecked=102, Total=2862 [2022-11-16 12:06:51,243 INFO L87 Difference]: Start difference. First operand 198 states and 235 transitions. Second operand has 47 states, 40 states have (on average 2.225) internal successors, (89), 43 states have internal predecessors, (89), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 12:06:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:57,361 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2022-11-16 12:06:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:06:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 40 states have (on average 2.225) internal successors, (89), 43 states have internal predecessors, (89), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 59 [2022-11-16 12:06:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:57,363 INFO L225 Difference]: With dead ends: 228 [2022-11-16 12:06:57,363 INFO L226 Difference]: Without dead ends: 225 [2022-11-16 12:06:57,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=324, Invalid=3581, Unknown=5, NotChecked=122, Total=4032 [2022-11-16 12:06:57,366 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 106 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:57,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1119 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1182 Invalid, 0 Unknown, 850 Unchecked, 1.6s Time] [2022-11-16 12:06:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-16 12:06:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 175. [2022-11-16 12:06:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 150 states have internal predecessors, (168), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 12:06:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2022-11-16 12:06:57,408 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 59 [2022-11-16 12:06:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:57,409 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2022-11-16 12:06:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 40 states have (on average 2.225) internal successors, (89), 43 states have internal predecessors, (89), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 12:06:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2022-11-16 12:06:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:06:57,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:57,410 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:57,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:06:57,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1079080327, now seen corresponding path program 1 times [2022-11-16 12:06:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:57,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72713929] [2022-11-16 12:06:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:00,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:00,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:03,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:07:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:07:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72713929] [2022-11-16 12:07:08,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72713929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107416849] [2022-11-16 12:07:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:08,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:08,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:07:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 241 conjunts are in the unsatisfiable core [2022-11-16 12:07:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:09,215 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-16 12:07:09,215 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 4 case distinctions, treesize of input 35 treesize of output 34 [2022-11-16 12:07:09,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:07:09,792 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:07:09,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:07:09,834 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:07:09,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:07:09,845 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 8 treesize of output 7 [2022-11-16 12:07:09,855 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 12 treesize of output 11 [2022-11-16 12:07:09,864 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 8 treesize of output 7 [2022-11-16 12:07:09,874 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 8 treesize of output 7 [2022-11-16 12:07:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:07:09,905 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 0 case distinctions, treesize of input 31 treesize of output 5 [2022-11-16 12:07:09,909 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 5 treesize of output 3 [2022-11-16 12:07:09,951 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 0 case distinctions, treesize of input 35 treesize of output 9 [2022-11-16 12:07:09,955 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 9 treesize of output 7 [2022-11-16 12:07:10,276 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-16 12:07:10,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 115 [2022-11-16 12:07:10,335 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 12:07:10,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 12:07:11,107 INFO L321 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2022-11-16 12:07:11,107 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 3 case distinctions, treesize of input 128 treesize of output 139 [2022-11-16 12:07:11,150 INFO L321 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2022-11-16 12:07:11,150 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 3 case distinctions, treesize of input 125 treesize of output 134 [2022-11-16 12:07:11,180 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 9 treesize of output 7 [2022-11-16 12:07:11,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:07:11,284 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 12 treesize of output 11 [2022-11-16 12:07:11,342 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 12 treesize of output 11 [2022-11-16 12:07:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:11,702 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-16 12:07:11,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 12:07:11,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-16 12:07:11,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2022-11-16 12:07:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-16 12:07:12,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-16 12:07:12,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-16 12:07:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:12,562 INFO L321 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2022-11-16 12:07:12,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 63 [2022-11-16 12:07:12,576 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 12 treesize of output 11 [2022-11-16 12:07:12,585 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 28 treesize of output 23 [2022-11-16 12:07:12,659 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 16 treesize of output 15 [2022-11-16 12:07:13,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2022-11-16 12:07:13,141 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-16 12:07:13,142 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2022-11-16 12:07:13,406 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 12:07:13,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 25 [2022-11-16 12:07:13,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 12:07:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 12:07:13,830 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4233 (Array Int Int)) (v_ArrVal_4235 (Array Int Int)) (v_ArrVal_4236 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_4238 (Array Int Int))) (and (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4238) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4233) |c_#memory_$Pointer$.offset|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4235) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4236) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:07:13,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,947 INFO L321 Elim1Store]: treesize reduction 58, result has 7.9 percent of original size [2022-11-16 12:07:13,947 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 69 [2022-11-16 12:07:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:13,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2022-11-16 12:07:13,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:07:13,991 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 52 treesize of output 41 [2022-11-16 12:07:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,042 INFO L321 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2022-11-16 12:07:14,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 53 [2022-11-16 12:07:14,565 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-16 12:07:14,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 42 [2022-11-16 12:07:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 12:07:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:14,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 12:07:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2022-11-16 12:07:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,573 INFO L321 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2022-11-16 12:07:15,574 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 6 case distinctions, treesize of input 140 treesize of output 125 [2022-11-16 12:07:15,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 63 treesize of output 48 [2022-11-16 12:07:15,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 12:07:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:15,638 INFO L321 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-11-16 12:07:15,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2022-11-16 12:07:15,648 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 8 treesize of output 7 [2022-11-16 12:07:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:18,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:18,254 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:07:18,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 36 [2022-11-16 12:07:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 2 times theorem prover too weak. 4 trivial. 6 not checked. [2022-11-16 12:07:18,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:20,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107416849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:20,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:20,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2022-11-16 12:07:20,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568606582] [2022-11-16 12:07:20,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:20,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 12:07:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 12:07:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3328, Unknown=5, NotChecked=116, Total=3660 [2022-11-16 12:07:20,719 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand has 53 states, 45 states have (on average 2.088888888888889) internal successors, (94), 48 states have internal predecessors, (94), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:07:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:27,494 INFO L93 Difference]: Finished difference Result 315 states and 382 transitions. [2022-11-16 12:07:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:07:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 45 states have (on average 2.088888888888889) internal successors, (94), 48 states have internal predecessors, (94), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 59 [2022-11-16 12:07:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:27,501 INFO L225 Difference]: With dead ends: 315 [2022-11-16 12:07:27,502 INFO L226 Difference]: Without dead ends: 245 [2022-11-16 12:07:27,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=410, Invalid=5592, Unknown=8, NotChecked=152, Total=6162 [2022-11-16 12:07:27,505 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 181 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 3043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:27,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1364 Invalid, 3043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2026 Invalid, 0 Unknown, 940 Unchecked, 3.2s Time] [2022-11-16 12:07:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-16 12:07:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 195. [2022-11-16 12:07:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 167 states have internal predecessors, (186), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 12:07:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 232 transitions. [2022-11-16 12:07:27,569 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 232 transitions. Word has length 59 [2022-11-16 12:07:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:27,570 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 232 transitions. [2022-11-16 12:07:27,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 45 states have (on average 2.088888888888889) internal successors, (94), 48 states have internal predecessors, (94), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:07:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 232 transitions. [2022-11-16 12:07:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:07:27,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:27,572 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:27,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:27,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:07:27,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1740102043, now seen corresponding path program 1 times [2022-11-16 12:07:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911905323] [2022-11-16 12:07:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:27,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:30,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:07:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:31,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:07:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911905323] [2022-11-16 12:07:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911905323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750881249] [2022-11-16 12:07:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:33,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:33,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:33,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:07:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 174 conjunts are in the unsatisfiable core [2022-11-16 12:07:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:34,265 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 14 treesize of output 12 [2022-11-16 12:07:34,404 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:07:34,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:07:34,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:07:34,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:07:34,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:07:34,431 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 51 treesize of output 9 [2022-11-16 12:07:34,434 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 9 treesize of output 7 [2022-11-16 12:07:34,472 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (or (and (= .cse0 |c_chain_node_#in~ppnode#1.base|) (not (= .cse0 0))) (exists ((v_DerPreprocessor_51 (Array Int Int)) (v_DerPreprocessor_52 (Array Int Int))) (let ((.cse1 (select v_DerPreprocessor_52 |c_chain_node_#in~ppnode#1.offset|))) (and (= .cse0 .cse1) (not (= .cse1 0)) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_51) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_52) .cse1 v_DerPreprocessor_51) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_52) .cse1))))))) is different from true [2022-11-16 12:07:34,787 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-16 12:07:34,787 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 2 case distinctions, treesize of input 68 treesize of output 71 [2022-11-16 12:07:34,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:07:34,930 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 8 treesize of output 4 [2022-11-16 12:07:34,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:07:35,214 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:07:35,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:07:35,224 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 8 treesize of output 7 [2022-11-16 12:07:35,235 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 12 treesize of output 11 [2022-11-16 12:07:35,302 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 0 case distinctions, treesize of input 66 treesize of output 39 [2022-11-16 12:07:35,305 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 39 treesize of output 35 [2022-11-16 12:07:35,323 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-16 12:07:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:35,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2022-11-16 12:07:35,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:07:35,623 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 28 treesize of output 23 [2022-11-16 12:07:35,889 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-16 12:07:35,889 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 35 [2022-11-16 12:07:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:35,902 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 15 treesize of output 11 [2022-11-16 12:07:35,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:07:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,597 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 56 treesize of output 52 [2022-11-16 12:07:36,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:36,624 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-16 12:07:36,624 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 49 [2022-11-16 12:07:36,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 38 treesize of output 31 [2022-11-16 12:07:36,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-16 12:07:36,648 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 25 treesize of output 21 [2022-11-16 12:07:36,655 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 12 treesize of output 11 [2022-11-16 12:07:36,680 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-16 12:07:36,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-16 12:07:36,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:07:37,025 INFO L321 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2022-11-16 12:07:37,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 66 [2022-11-16 12:07:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,035 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 47 treesize of output 45 [2022-11-16 12:07:37,220 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-16 12:07:37,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 41 [2022-11-16 12:07:37,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:07:37,231 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 19 treesize of output 7 [2022-11-16 12:07:37,439 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4693 (Array Int Int)) (|chain_node_~ppnode#1.offset| Int) (v_ArrVal_4694 (Array Int Int)) (v_ArrVal_4695 (Array Int Int)) (v_ArrVal_4687 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_4687 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4687) |c_chain_node_#in~ppnode#1.base|) |chain_node_~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4694) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4693) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4695)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:07:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,527 INFO L321 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2022-11-16 12:07:37,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 134 treesize of output 110 [2022-11-16 12:07:37,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:37,546 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 106 treesize of output 90 [2022-11-16 12:07:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:37,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 55 [2022-11-16 12:07:37,578 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 15 treesize of output 11 [2022-11-16 12:07:37,608 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-16 12:07:37,609 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 28 treesize of output 30 [2022-11-16 12:07:37,615 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 8 treesize of output 7 [2022-11-16 12:07:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:38,409 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:07:38,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-11-16 12:07:38,616 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-16 12:07:38,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 28 [2022-11-16 12:07:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 20 refuted. 2 times theorem prover too weak. 1 trivial. 10 not checked. [2022-11-16 12:07:38,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:38,832 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~ppnode#1.offset_38| Int) (|v_chain_node_~node~0#1.base_42| Int) (v_ArrVal_4710 (Array Int Int)) (|v_chain_node_~node~0#1.offset_37| Int) (v_ArrVal_4711 (Array Int Int)) (v_ArrVal_4712 (Array Int Int)) (v_ArrVal_4713 (Array Int Int))) (or (not (= (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_42| v_ArrVal_4710) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_4712)) (.cse0 (store (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_42| (store v_ArrVal_4713 |v_chain_node_~node~0#1.offset_37| (select (select (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_42| v_ArrVal_4713) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |v_chain_node_~ppnode#1.offset_38|))) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_4711))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) 0)) (not (< |v_chain_node_~node~0#1.base_42| |c_#StackHeapBarrier|)) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_42|) 0)))) is different from false [2022-11-16 12:07:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750881249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:38,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:38,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 49 [2022-11-16 12:07:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036257370] [2022-11-16 12:07:38,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:07:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:07:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2016, Unknown=17, NotChecked=276, Total=2450 [2022-11-16 12:07:38,845 INFO L87 Difference]: Start difference. First operand 195 states and 232 transitions. Second operand has 49 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 44 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:07:40,477 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))) (let ((.cse0 (+ |c_#StackHeapBarrier| 1)) (.cse1 (not (= .cse2 0)))) (and (<= .cse0 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#p1~0#1.base|) .cse1 (not (= |c_ULTIMATE.start_create_sll_~pp2#1.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#p1~0#1.base| |c_ULTIMATE.start_main_~#p2~0#1.base|)) (= |c_ULTIMATE.start_main_~#p1~0#1.offset| |c_ULTIMATE.start_create_sll_~pp1#1.offset|) (= |c_ULTIMATE.start_create_sll_~#list~0#1.offset| 0) (<= .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) (= |c_ULTIMATE.start_main_~#p1~0#1.base| |c_ULTIMATE.start_create_sll_~pp1#1.base|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_create_sll_~#list~0#1.base|) (not (= |c_ULTIMATE.start_main_~#p1~0#1.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|)) (or (and (= .cse2 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) .cse1) (exists ((v_DerPreprocessor_51 (Array Int Int)) (v_DerPreprocessor_52 (Array Int Int))) (let ((.cse3 (select v_DerPreprocessor_52 |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))) (and (= .cse3 .cse2) (= (select |c_#memory_$Pointer$.base| .cse3) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_51) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_DerPreprocessor_52) .cse3 v_DerPreprocessor_51) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_DerPreprocessor_52) .cse3)) (not (= .cse3 0)))))) (= |c_ULTIMATE.start_main_~#p1~0#1.offset| 0)))) is different from true [2022-11-16 12:07:40,991 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (let ((.cse1 (not (= .cse0 0)))) (and (or (and (= .cse0 |c_chain_node_#in~ppnode#1.base|) .cse1) (exists ((v_DerPreprocessor_51 (Array Int Int)) (v_DerPreprocessor_52 (Array Int Int))) (let ((.cse2 (select v_DerPreprocessor_52 |c_chain_node_#in~ppnode#1.offset|))) (and (= .cse0 .cse2) (not (= .cse2 0)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_51) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_52) .cse2 v_DerPreprocessor_51) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_52) .cse2)))))) .cse1))) is different from true [2022-11-16 12:07:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:43,617 INFO L93 Difference]: Finished difference Result 257 states and 312 transitions. [2022-11-16 12:07:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:07:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 44 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 59 [2022-11-16 12:07:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:43,619 INFO L225 Difference]: With dead ends: 257 [2022-11-16 12:07:43,619 INFO L226 Difference]: Without dead ends: 254 [2022-11-16 12:07:43,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=257, Invalid=3650, Unknown=19, NotChecked=630, Total=4556 [2022-11-16 12:07:43,621 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 88 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 856 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:43,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1522 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1956 Invalid, 0 Unknown, 856 Unchecked, 2.3s Time] [2022-11-16 12:07:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-16 12:07:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 234. [2022-11-16 12:07:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 188 states have (on average 1.1861702127659575) internal successors, (223), 200 states have internal predecessors, (223), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (26), 20 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-16 12:07:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 282 transitions. [2022-11-16 12:07:43,702 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 282 transitions. Word has length 59 [2022-11-16 12:07:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:43,703 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 282 transitions. [2022-11-16 12:07:43,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 44 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:07:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 282 transitions. [2022-11-16 12:07:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:07:43,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:43,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:43,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:43,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:43,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash -186573861, now seen corresponding path program 1 times [2022-11-16 12:07:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737241160] [2022-11-16 12:07:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:07:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:07:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:07:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:54,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:54,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737241160] [2022-11-16 12:07:54,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737241160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:54,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940684771] [2022-11-16 12:07:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:54,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:54,113 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:54,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:07:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 275 conjunts are in the unsatisfiable core [2022-11-16 12:07:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:54,626 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-16 12:07:54,626 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 4 case distinctions, treesize of input 35 treesize of output 34 [2022-11-16 12:07:54,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 12:07:54,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:54,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 12:07:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:54,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 12:07:55,110 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-16 12:07:55,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2022-11-16 12:07:55,149 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-16 12:07:55,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 73 [2022-11-16 12:07:55,160 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 8 treesize of output 7 [2022-11-16 12:07:55,222 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-16 12:07:55,222 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 3 case distinctions, treesize of input 43 treesize of output 53 [2022-11-16 12:07:55,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:07:55,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 23 treesize of output 20 [2022-11-16 12:07:55,334 INFO L321 Elim1Store]: treesize reduction 61, result has 7.6 percent of original size [2022-11-16 12:07:55,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 117 [2022-11-16 12:07:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:07:55,365 INFO L321 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2022-11-16 12:07:55,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 22 [2022-11-16 12:07:55,483 INFO L321 Elim1Store]: treesize reduction 44, result has 26.7 percent of original size [2022-11-16 12:07:55,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 22 [2022-11-16 12:07:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:07:55,533 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 140 treesize of output 77 [2022-11-16 12:07:55,544 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:07:55,544 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 37 treesize of output 31 [2022-11-16 12:07:55,956 INFO L321 Elim1Store]: treesize reduction 78, result has 33.9 percent of original size [2022-11-16 12:07:55,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 61 [2022-11-16 12:07:56,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-16 12:07:56,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:56,503 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 56 [2022-11-16 12:07:56,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:56,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-16 12:07:56,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 12:07:56,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 12:07:57,097 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5132 (Array Int Int)) (v_ArrVal_5133 (Array Int Int)) (v_ArrVal_5126 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5130 (Array Int Int))) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5130) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5132) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)) |c_#memory_$Pointer$.offset|) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_5126 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_5126) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_5133)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:07:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,198 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-16 12:07:57,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 83 [2022-11-16 12:07:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-16 12:07:57,231 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 20 treesize of output 16 [2022-11-16 12:07:57,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 12:07:57,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,271 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-11-16 12:07:57,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 48 [2022-11-16 12:07:57,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-16 12:07:57,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 42 [2022-11-16 12:07:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:57,854 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-16 12:07:57,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 84 [2022-11-16 12:07:58,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2022-11-16 12:07:58,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:58,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 35 [2022-11-16 12:07:58,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 12:07:58,480 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5143 (Array Int Int)) (v_ArrVal_5145 (Array Int Int)) (v_ArrVal_5146 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5141 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5145) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5141) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_5143) |c_chain_node_#in~ppnode#1.base| v_ArrVal_5146)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:07:58,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 55 [2022-11-16 12:07:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,625 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-16 12:07:58,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 93 [2022-11-16 12:07:58,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:58,660 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:07:58,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 12:07:58,676 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 9 treesize of output 7 [2022-11-16 12:07:58,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 18 treesize of output 15 [2022-11-16 12:07:59,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:59,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 30 [2022-11-16 12:07:59,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 12:07:59,455 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5151 Int) (v_ArrVal_5159 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5148 Int)) (and (= |c_#memory_$Pointer$.offset| (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (let ((.cse1 (store (store (select |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base|) 0 v_ArrVal_5151) 4 0))) (store .cse1 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| .cse1) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|)))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (let ((.cse2 (store (store (select |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base|) 0 v_ArrVal_5148) 4 0))) (store .cse2 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| .cse2) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|)))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_5159)))) is different from true [2022-11-16 12:07:59,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,532 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:07:59,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 71 [2022-11-16 12:07:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,562 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-16 12:07:59,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 59 [2022-11-16 12:07:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:59,592 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-16 12:07:59,593 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 4 case distinctions, treesize of input 79 treesize of output 76 [2022-11-16 12:07:59,606 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 9 treesize of output 7 [2022-11-16 12:08:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:03,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:03,386 INFO L321 Elim1Store]: treesize reduction 52, result has 13.3 percent of original size [2022-11-16 12:08:03,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 132 treesize of output 65 [2022-11-16 12:08:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:03,416 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-11-16 12:08:03,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 30 [2022-11-16 12:08:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 12 not checked. [2022-11-16 12:08:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:28,140 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:08:46,256 WARN L233 SmtUtils]: Spent 10.37s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:09:01,711 WARN L233 SmtUtils]: Spent 10.27s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:09:02,568 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_chain_node_~node~0#1.base_47| Int)) (or (not (< |v_chain_node_~node~0#1.base_47| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_5185 Int) (v_ArrVal_5186 Int) (v_ArrVal_5184 (Array Int Int))) (let ((.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_47| (let ((.cse7 (store (store (select |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_47|) 0 v_ArrVal_5185) 4 0))) (store .cse7 0 (select (select (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_47| .cse7) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|)))))) (store .cse6 |c_ULTIMATE.start_create_sll_~#list~0#1.base| (store (select .cse6 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset| 0)))) (.cse0 (store (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_47| (let ((.cse5 (store (store (select |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_47|) 0 v_ArrVal_5186) 4 0))) (store .cse5 0 (select (select (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_47| .cse5) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|)))) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_5184))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#p2~0#1.base|) |c_ULTIMATE.start_main_~#p2~0#1.offset|)) (.cse3 (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (.cse4 (select (select .cse2 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (or (= (select (select .cse0 .cse1) (+ 4 (select (select .cse2 |c_ULTIMATE.start_main_~#p2~0#1.base|) |c_ULTIMATE.start_main_~#p2~0#1.offset|))) 0) (not (= (select .cse3 (+ .cse4 4)) 0)) (not (= .cse1 (select .cse3 .cse4))))))))) (forall ((|v_chain_node_~node~0#1.base_47| Int)) (or (not (< |v_chain_node_~node~0#1.base_47| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_5185 Int) (v_ArrVal_5186 Int) (v_ArrVal_5184 (Array Int Int))) (let ((.cse11 (let ((.cse14 (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_47| (let ((.cse15 (store (store (select |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_47|) 0 v_ArrVal_5185) 4 0))) (store .cse15 0 (select (select (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_47| .cse15) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|)))))) (store .cse14 |c_ULTIMATE.start_create_sll_~#list~0#1.base| (store (select .cse14 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset| 0)))) (.cse12 (store (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_47| (let ((.cse13 (store (store (select |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_47|) 0 v_ArrVal_5186) 4 0))) (store .cse13 0 (select (select (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_47| .cse13) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|)))) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_5184))) (let ((.cse8 (select .cse12 (select (select .cse12 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (.cse9 (select (select .cse11 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (.cse10 (select (select .cse12 |c_ULTIMATE.start_main_~#p2~0#1.base|) |c_ULTIMATE.start_main_~#p2~0#1.offset|))) (or (not (= (select .cse8 (+ .cse9 4)) 0)) (not (= .cse10 (select .cse8 .cse9))) (= (select (select .cse11 .cse10) (+ 4 (select (select .cse11 |c_ULTIMATE.start_main_~#p2~0#1.base|) |c_ULTIMATE.start_main_~#p2~0#1.offset|))) 0)))))))) is different from false [2022-11-16 12:09:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940684771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:02,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:02,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 52 [2022-11-16 12:09:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348261127] [2022-11-16 12:09:02,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:09:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:09:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2904, Unknown=15, NotChecked=452, Total=3660 [2022-11-16 12:09:02,589 INFO L87 Difference]: Start difference. First operand 234 states and 282 transitions. Second operand has 52 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 47 states have internal predecessors, (98), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:09:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:11,856 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2022-11-16 12:09:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:09:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 47 states have internal predecessors, (98), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Word has length 62 [2022-11-16 12:09:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:11,858 INFO L225 Difference]: With dead ends: 314 [2022-11-16 12:09:11,858 INFO L226 Difference]: Without dead ends: 311 [2022-11-16 12:09:11,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 72.3s TimeCoverageRelationStatistics Valid=405, Invalid=4018, Unknown=15, NotChecked=532, Total=4970 [2022-11-16 12:09:11,860 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 88 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1065 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:11,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1134 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1363 Invalid, 0 Unknown, 1065 Unchecked, 2.2s Time] [2022-11-16 12:09:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-16 12:09:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 252. [2022-11-16 12:09:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 200 states have (on average 1.2) internal successors, (240), 213 states have internal predecessors, (240), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (32), 25 states have call predecessors, (32), 31 states have call successors, (32) [2022-11-16 12:09:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 311 transitions. [2022-11-16 12:09:11,959 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 311 transitions. Word has length 62 [2022-11-16 12:09:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 311 transitions. [2022-11-16 12:09:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 47 states have internal predecessors, (98), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:09:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 311 transitions. [2022-11-16 12:09:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:09:11,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:11,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:11,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:12,163 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:12,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1802853032, now seen corresponding path program 1 times [2022-11-16 12:09:12,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:12,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821274807] [2022-11-16 12:09:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:12,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:09:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:09:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:09:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821274807] [2022-11-16 12:09:12,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821274807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:12,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583415648] [2022-11-16 12:09:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:12,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:12,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:12,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:12,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:09:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:09:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:12,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-16 12:09:12,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 12:09:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:09:12,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:09:13,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583415648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:13,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:13,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 12 [2022-11-16 12:09:13,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908775576] [2022-11-16 12:09:13,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:13,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:09:13,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:09:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:09:13,269 INFO L87 Difference]: Start difference. First operand 252 states and 311 transitions. Second operand has 12 states, 9 states have (on average 5.888888888888889) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:09:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:13,973 INFO L93 Difference]: Finished difference Result 279 states and 345 transitions. [2022-11-16 12:09:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:09:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.888888888888889) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-11-16 12:09:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:13,976 INFO L225 Difference]: With dead ends: 279 [2022-11-16 12:09:13,976 INFO L226 Difference]: Without dead ends: 276 [2022-11-16 12:09:13,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:09:13,977 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 100 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:13,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 441 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 403 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2022-11-16 12:09:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-16 12:09:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 260. [2022-11-16 12:09:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 207 states have (on average 1.1980676328502415) internal successors, (248), 220 states have internal predecessors, (248), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (33), 25 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-16 12:09:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 321 transitions. [2022-11-16 12:09:14,044 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 321 transitions. Word has length 63 [2022-11-16 12:09:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:14,044 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 321 transitions. [2022-11-16 12:09:14,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.888888888888889) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:09:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 321 transitions. [2022-11-16 12:09:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:09:14,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:14,046 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:14,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:09:14,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1473312201, now seen corresponding path program 2 times [2022-11-16 12:09:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:14,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921022226] [2022-11-16 12:09:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:09:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:09:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:25,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921022226] [2022-11-16 12:09:25,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921022226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247637385] [2022-11-16 12:09:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:25,986 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:09:26,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:09:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 229 conjunts are in the unsatisfiable core [2022-11-16 12:09:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:26,569 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:09:26,569 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 23 treesize of output 19 [2022-11-16 12:09:26,806 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:09:26,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:09:26,847 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:09:26,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:09:26,857 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 8 treesize of output 7 [2022-11-16 12:09:26,867 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 12 treesize of output 11 [2022-11-16 12:09:26,877 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 8 treesize of output 7 [2022-11-16 12:09:26,887 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 8 treesize of output 7 [2022-11-16 12:09:26,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:09:26,946 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 0 case distinctions, treesize of input 31 treesize of output 5 [2022-11-16 12:09:26,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:09:26,985 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2022-11-16 12:09:26,989 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 9 treesize of output 7 [2022-11-16 12:09:27,040 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 9 treesize of output 7 [2022-11-16 12:09:27,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 12:09:27,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-16 12:09:27,636 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 19 treesize of output 7 [2022-11-16 12:09:27,642 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 11 treesize of output 3 [2022-11-16 12:09:27,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:28,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-16 12:09:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-16 12:09:28,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 12:09:28,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 12:09:28,528 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 16 treesize of output 15 [2022-11-16 12:09:28,546 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 16 treesize of output 15 [2022-11-16 12:09:28,967 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 12:09:28,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 26 [2022-11-16 12:09:28,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:28,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 12:09:28,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:09:29,523 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5893 (Array Int Int)) (v_ArrVal_5894 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5902 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_5893 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_5893) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_5902) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_5894 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5894) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.offset|)))) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:09:29,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,656 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-16 12:09:29,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 66 [2022-11-16 12:09:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:29,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 48 [2022-11-16 12:09:29,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 57 treesize of output 46 [2022-11-16 12:09:29,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 12:09:29,730 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 16 treesize of output 15 [2022-11-16 12:09:29,767 INFO L321 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2022-11-16 12:09:29,767 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 37 treesize of output 53 [2022-11-16 12:09:29,810 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 16 treesize of output 15 [2022-11-16 12:09:30,335 INFO L321 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2022-11-16 12:09:30,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 145 treesize of output 91 [2022-11-16 12:09:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,373 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 12:09:30,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 136 treesize of output 122 [2022-11-16 12:09:30,717 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-16 12:09:30,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 141 treesize of output 55 [2022-11-16 12:09:30,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:30,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2022-11-16 12:09:30,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:31,196 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5917 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5912 (Array Int Int)) (v_ArrVal_5913 (Array Int Int)) (v_ArrVal_5916 (Array Int Int))) (and (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5917) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_5912) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)) |c_#memory_$Pointer$.offset|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_5916) |c_chain_node_#in~ppnode#1.base| v_ArrVal_5913)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-16 12:09:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,313 INFO L321 Elim1Store]: treesize reduction 70, result has 6.7 percent of original size [2022-11-16 12:09:31,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 182 treesize of output 176 [2022-11-16 12:09:31,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:31,384 INFO L321 Elim1Store]: treesize reduction 116, result has 8.7 percent of original size [2022-11-16 12:09:31,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 206 treesize of output 173 [2022-11-16 12:09:31,397 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 169 treesize of output 141 [2022-11-16 12:09:31,454 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-16 12:09:31,455 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 32 treesize of output 34 [2022-11-16 12:09:31,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 18 treesize of output 15 [2022-11-16 12:09:34,393 INFO L321 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2022-11-16 12:09:34,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 229 treesize of output 101 [2022-11-16 12:09:34,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,426 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:09:34,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 28 [2022-11-16 12:09:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2022-11-16 12:09:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:36,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247637385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:36,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:36,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 52 [2022-11-16 12:09:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904745764] [2022-11-16 12:09:36,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:36,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:09:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:36,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:09:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3019, Unknown=2, NotChecked=222, Total=3422 [2022-11-16 12:09:36,168 INFO L87 Difference]: Start difference. First operand 260 states and 321 transitions. Second operand has 52 states, 44 states have (on average 2.272727272727273) internal successors, (100), 47 states have internal predecessors, (100), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:09:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:42,481 INFO L93 Difference]: Finished difference Result 357 states and 439 transitions. [2022-11-16 12:09:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:09:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 44 states have (on average 2.272727272727273) internal successors, (100), 47 states have internal predecessors, (100), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 63 [2022-11-16 12:09:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:42,484 INFO L225 Difference]: With dead ends: 357 [2022-11-16 12:09:42,484 INFO L226 Difference]: Without dead ends: 280 [2022-11-16 12:09:42,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=289, Invalid=4409, Unknown=2, NotChecked=270, Total=4970 [2022-11-16 12:09:42,487 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 112 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:42,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1286 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1449 Invalid, 0 Unknown, 670 Unchecked, 2.7s Time] [2022-11-16 12:09:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-16 12:09:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 254. [2022-11-16 12:09:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 202 states have (on average 1.188118811881188) internal successors, (240), 216 states have internal predecessors, (240), 39 states have call successors, (39), 14 states have call predecessors, (39), 12 states have return successors, (32), 23 states have call predecessors, (32), 31 states have call successors, (32) [2022-11-16 12:09:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 311 transitions. [2022-11-16 12:09:42,586 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 311 transitions. Word has length 63 [2022-11-16 12:09:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:42,587 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 311 transitions. [2022-11-16 12:09:42,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 44 states have (on average 2.272727272727273) internal successors, (100), 47 states have internal predecessors, (100), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:09:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 311 transitions. [2022-11-16 12:09:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 12:09:42,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:42,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:42,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:42,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:09:42,799 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 17440653, now seen corresponding path program 1 times [2022-11-16 12:09:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:42,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327149006] [2022-11-16 12:09:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:43,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:44,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:44,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:09:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:09:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:09:44,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327149006] [2022-11-16 12:09:44,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327149006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:44,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705518931] [2022-11-16 12:09:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:44,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:44,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:44,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:44,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:09:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:09:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:45,146 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:09:45,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:09:45,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:09:45,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:09:45,198 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-16 12:09:45,199 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2022-11-16 12:09:45,201 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 21 treesize of output 15 [2022-11-16 12:09:47,724 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 12:09:47,724 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 31 treesize of output 40 [2022-11-16 12:09:48,015 INFO L321 Elim1Store]: treesize reduction 273, result has 30.5 percent of original size [2022-11-16 12:09:48,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 35 case distinctions, treesize of input 175 treesize of output 251 [2022-11-16 12:09:48,077 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 7 treesize of output 5 [2022-11-16 12:09:48,123 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 7 treesize of output 5 [2022-11-16 12:09:49,042 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:49,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 30 [2022-11-16 12:09:49,087 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:49,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:49,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:09:49,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:09:49,492 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:49,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 21 [2022-11-16 12:09:49,671 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:49,672 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 1 case distinctions, treesize of input 20 treesize of output 30 [2022-11-16 12:09:49,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:09:49,721 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:49,721 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:49,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:09:50,760 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:09:50,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 19 [2022-11-16 12:09:50,771 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 12 treesize of output 11 [2022-11-16 12:09:50,818 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:50,818 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:50,905 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:50,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:50,958 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:09:50,958 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 3 case distinctions, treesize of input 25 treesize of output 32 [2022-11-16 12:09:50,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:09:51,014 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:51,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 21 [2022-11-16 12:09:51,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:09:51,042 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 14 treesize of output 13 [2022-11-16 12:09:51,123 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:09:51,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 22 [2022-11-16 12:09:51,154 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-16 12:09:51,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 26 [2022-11-16 12:09:51,205 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:09:51,206 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 3 case distinctions, treesize of input 30 treesize of output 35 [2022-11-16 12:09:51,306 INFO L321 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-11-16 12:09:51,306 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 3 case distinctions, treesize of input 26 treesize of output 55 [2022-11-16 12:09:51,471 INFO L321 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-11-16 12:09:51,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 55 [2022-11-16 12:09:51,605 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-16 12:09:51,606 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 1 case distinctions, treesize of input 18 treesize of output 26 [2022-11-16 12:09:51,650 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:51,650 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 1 case distinctions, treesize of input 20 treesize of output 30 [2022-11-16 12:09:51,721 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:51,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 24 [2022-11-16 12:09:51,755 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:51,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 30 [2022-11-16 12:09:51,894 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:09:51,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 19 [2022-11-16 12:09:51,907 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 12 treesize of output 11 [2022-11-16 12:09:51,957 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:51,958 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:52,056 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:52,117 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:09:52,118 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 3 case distinctions, treesize of input 25 treesize of output 32 [2022-11-16 12:09:52,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:09:52,184 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:52,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 21 [2022-11-16 12:09:52,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-16 12:09:52,216 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 14 treesize of output 13 [2022-11-16 12:09:52,328 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:09:52,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 19 [2022-11-16 12:09:52,353 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:52,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 23 [2022-11-16 12:09:52,391 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:52,391 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 1 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 12:09:52,465 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-16 12:09:52,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-16 12:09:52,551 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-16 12:09:52,551 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 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-16 12:09:52,697 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:09:52,697 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 3 case distinctions, treesize of input 25 treesize of output 32 [2022-11-16 12:09:52,771 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:09:52,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 21 [2022-11-16 12:09:52,805 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:52,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:09:52,861 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-16 12:09:52,862 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:13:10,073 WARN L233 SmtUtils]: Spent 2.95m on a formula simplification. DAG size of input: 366 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:13:10,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:10,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 106 [2022-11-16 12:13:10,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 72 [2022-11-16 12:13:10,468 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 17 treesize of output 13 [2022-11-16 12:13:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 3 refuted. 1 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:13:10,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:15,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705518931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:15,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 38 [2022-11-16 12:13:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904868278] [2022-11-16 12:13:15,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:15,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 12:13:15,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 12:13:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1463, Unknown=71, NotChecked=0, Total=1640 [2022-11-16 12:13:15,222 INFO L87 Difference]: Start difference. First operand 254 states and 311 transitions. Second operand has 38 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 36 states have internal predecessors, (97), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:13:17,985 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#p1~0#1.base|))) (let ((.cse7 (not (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|) 0))) (.cse2 (not (= (select .cse6 |c_ULTIMATE.start_main_~#p1~0#1.offset|) 0)))) (let ((.cse0 (or .cse7 .cse2))) (and .cse0 (let ((.cse1 (select .cse6 0))) (or (and (not (= .cse1 0)) .cse2) (and .cse0 (exists ((|ULTIMATE.start_init_back_link_~list#1.base| Int)) (and (not (= |ULTIMATE.start_init_back_link_~list#1.base| |c_ULTIMATE.start_main_~#p1~0#1.base|)) (exists ((v_prenex_38 Int) (|ULTIMATE.start_init_back_link_~next~0#1.offset| Int)) (let ((.cse4 (select |c_#memory_$Pointer$.base| v_prenex_38))) (let ((.cse3 (select .cse4 0))) (and (not (= .cse3 0)) (= (store .cse4 (+ |ULTIMATE.start_init_back_link_~next~0#1.offset| 4) .cse3) (select |c_#memory_$Pointer$.base| |ULTIMATE.start_init_back_link_~list#1.base|))))))))) (and (exists ((|ULTIMATE.start_init_back_link_~next~0#1.offset| Int)) (let ((.cse5 (select .cse6 (+ |ULTIMATE.start_init_back_link_~next~0#1.offset| 4)))) (and (= .cse5 .cse1) (not (= .cse5 0))))) .cse7))) (not (= |c_ULTIMATE.start_init_back_link_~next~0#1.base| |c_ULTIMATE.start_main_~#p1~0#1.base|)) (or (exists ((v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_64 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_45| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_45|) 0))) (and (not (= .cse8 0)) (= (select v_DerPreprocessor_64 0) .cse8) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_63) |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| v_DerPreprocessor_64) .cse8 v_DerPreprocessor_63) |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| v_DerPreprocessor_64) .cse8) (select |c_#memory_$Pointer$.base| .cse8))))) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_45| Int)) (and (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_45|) 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| 0))))) (or (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_45| Int)) (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_45|) 0))) (and (not (= .cse9 0)) (exists ((v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_64 (Array Int Int))) (and (= (select v_DerPreprocessor_64 0) .cse9) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_63) |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| v_DerPreprocessor_64) .cse9 v_DerPreprocessor_63) |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| v_DerPreprocessor_64) .cse9) (select |c_#memory_$Pointer$.base| .cse9)))) (= .cse9 |c_ULTIMATE.start_init_back_link_~list#1.base|)))) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_45| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_45|) 0))) (and (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| .cse10) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_45| 0)) (= .cse10 |c_ULTIMATE.start_init_back_link_~list#1.base|))))))))) is different from true [2022-11-16 12:13:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:19,060 INFO L93 Difference]: Finished difference Result 321 states and 394 transitions. [2022-11-16 12:13:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:13:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 36 states have internal predecessors, (97), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 65 [2022-11-16 12:13:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:19,063 INFO L225 Difference]: With dead ends: 321 [2022-11-16 12:13:19,063 INFO L226 Difference]: Without dead ends: 318 [2022-11-16 12:13:19,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 206.5s TimeCoverageRelationStatistics Valid=243, Invalid=3326, Unknown=95, NotChecked=118, Total=3782 [2022-11-16 12:13:19,065 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 133 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:19,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1293 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1055 Invalid, 0 Unknown, 623 Unchecked, 1.0s Time] [2022-11-16 12:13:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-16 12:13:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 274. [2022-11-16 12:13:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 220 states have (on average 1.1818181818181819) internal successors, (260), 234 states have internal predecessors, (260), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (36), 25 states have call predecessors, (36), 31 states have call successors, (36) [2022-11-16 12:13:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 335 transitions. [2022-11-16 12:13:19,153 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 335 transitions. Word has length 65 [2022-11-16 12:13:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:19,153 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 335 transitions. [2022-11-16 12:13:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 36 states have internal predecessors, (97), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:13:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 335 transitions. [2022-11-16 12:13:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 12:13:19,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:19,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:19,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:19,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:13:19,363 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:13:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1662798770, now seen corresponding path program 1 times [2022-11-16 12:13:19,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:13:19,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907761230] [2022-11-16 12:13:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:19,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:13:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:13:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:13:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:13:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:19,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:13:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:13:19,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:13:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907761230] [2022-11-16 12:13:19,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907761230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353351942] [2022-11-16 12:13:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:19,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:19,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:13:19,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:13:19,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:13:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:20,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:13:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:20,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-16 12:13:20,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 12:13:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:13:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:13:20,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353351942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:20,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:13:20,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 12 [2022-11-16 12:13:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139332103] [2022-11-16 12:13:20,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:20,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:20,726 INFO L87 Difference]: Start difference. First operand 274 states and 335 transitions. Second operand has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:13:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:21,503 INFO L93 Difference]: Finished difference Result 303 states and 371 transitions. [2022-11-16 12:13:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:13:21,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-11-16 12:13:21,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:21,506 INFO L225 Difference]: With dead ends: 303 [2022-11-16 12:13:21,506 INFO L226 Difference]: Without dead ends: 300 [2022-11-16 12:13:21,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:21,507 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 96 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:21,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 427 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 463 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2022-11-16 12:13:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-16 12:13:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 284. [2022-11-16 12:13:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 229 states have (on average 1.1790393013100438) internal successors, (270), 243 states have internal predecessors, (270), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (37), 25 states have call predecessors, (37), 32 states have call successors, (37) [2022-11-16 12:13:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2022-11-16 12:13:21,599 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 65 [2022-11-16 12:13:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:21,600 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2022-11-16 12:13:21,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:13:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2022-11-16 12:13:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:13:21,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:21,602 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:21,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:13:21,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:13:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1114148957, now seen corresponding path program 2 times [2022-11-16 12:13:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:13:21,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073568569] [2022-11-16 12:13:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:13:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:23,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:13:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:13:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:13:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:23,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:13:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 12:13:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:23,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:13:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:13:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:13:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073568569] [2022-11-16 12:13:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073568569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338727884] [2022-11-16 12:13:24,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:13:24,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:13:24,303 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:13:24,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:13:24,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:13:24,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-16 12:13:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:24,912 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 14 treesize of output 12 [2022-11-16 12:13:25,090 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:13:25,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:13:25,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:13:25,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-16 12:13:25,151 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-16 12:13:25,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-11-16 12:13:25,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-16 12:13:25,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 12:13:25,392 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 20 treesize of output 8 [2022-11-16 12:13:25,537 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7112 (Array Int Int)) (|chain_node_~ppnode#1.offset| Int) (v_ArrVal_7107 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (|chain_node_~node~0#1.offset| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_7107))) (store .cse0 |chain_node_~node~0#1.base| (store (select .cse0 |chain_node_~node~0#1.base|) |chain_node_~node~0#1.offset| (select (select .cse0 |c_chain_node_#in~ppnode#1.base|) |chain_node_~ppnode#1.offset|)))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_7112)) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|))) is different from true [2022-11-16 12:13:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:25,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:25,891 INFO L321 Elim1Store]: treesize reduction 152, result has 42.6 percent of original size [2022-11-16 12:13:25,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 126 treesize of output 406 [2022-11-16 12:13:25,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 21 treesize of output 33 [2022-11-16 12:13:26,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:26,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:26,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:26,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:26,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:26,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 147 [2022-11-16 12:13:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:26,605 INFO L321 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2022-11-16 12:13:26,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 177 treesize of output 170 [2022-11-16 12:13:26,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:26,838 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 522 treesize of output 518 [2022-11-16 12:13:28,974 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-16 12:13:28,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 135 [2022-11-16 12:13:29,066 INFO L321 Elim1Store]: treesize reduction 39, result has 42.6 percent of original size [2022-11-16 12:13:29,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 59 [2022-11-16 12:13:29,106 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:13:29,164 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-16 12:13:29,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 135 [2022-11-16 12:13:29,380 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-16 12:13:29,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 128 [2022-11-16 12:13:29,521 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-16 12:13:29,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 128 [2022-11-16 12:13:29,567 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:13:29,577 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:13:30,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:30,214 INFO L321 Elim1Store]: treesize reduction 28, result has 36.4 percent of original size [2022-11-16 12:13:30,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 503 treesize of output 485 [2022-11-16 12:13:30,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:30,245 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 420 treesize of output 425 [2022-11-16 12:13:30,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:30,692 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 71 treesize of output 5 [2022-11-16 12:13:30,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:30,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-11-16 12:13:30,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:30,936 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 72 treesize of output 74 [2022-11-16 12:13:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:31,169 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-16 12:13:31,170 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 3 case distinctions, treesize of input 267 treesize of output 222 [2022-11-16 12:13:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:31,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:31,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 47 [2022-11-16 12:13:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:31,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:31,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:31,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 47 [2022-11-16 12:13:31,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:31,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:31,567 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:13:32,735 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 8 treesize of output 4 [2022-11-16 12:13:32,838 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7114 (Array Int Int)) (v_ArrVal_7115 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_7115) |c_chain_node_#in~ppnode#1.base| v_ArrVal_7114)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2022-11-16 12:13:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:32,871 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:13:32,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 26 [2022-11-16 12:13:32,903 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 8 treesize of output 4 [2022-11-16 12:13:33,018 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7107 (Array Int Int)) (v_ArrVal_7118 (Array Int Int)) (v_ArrVal_7117 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= |c_#memory_$Pointer$.base| (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_7107) |chain_node_~node~0#1.base| v_ArrVal_7117) |c_chain_node_#in~ppnode#1.base| v_ArrVal_7118)))) is different from true [2022-11-16 12:13:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:33,081 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:13:33,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 38 [2022-11-16 12:13:33,125 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 8 treesize of output 4 [2022-11-16 12:13:33,234 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7107 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (v_ArrVal_7121 (Array Int Int)) (v_ArrVal_7120 (Array Int Int))) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= |c_#memory_$Pointer$.base| (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_7107) |chain_node_~node~0#1.base| v_ArrVal_7120) |c_chain_node_#in~ppnode#1.base| v_ArrVal_7121)))) is different from true [2022-11-16 12:13:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:33,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:33,293 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:13:33,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 38 [2022-11-16 12:13:33,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-16 12:13:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 31 trivial. 20 not checked. [2022-11-16 12:13:33,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:33,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338727884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:33,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:33,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2022-11-16 12:13:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146151279] [2022-11-16 12:13:33,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:13:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:13:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=775, Unknown=7, NotChecked=236, Total=1122 [2022-11-16 12:13:33,569 INFO L87 Difference]: Start difference. First operand 284 states and 347 transitions. Second operand has 33 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 9 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-16 12:13:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:35,502 INFO L93 Difference]: Finished difference Result 313 states and 380 transitions. [2022-11-16 12:13:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:13:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 9 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 67 [2022-11-16 12:13:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:35,504 INFO L225 Difference]: With dead ends: 313 [2022-11-16 12:13:35,504 INFO L226 Difference]: Without dead ends: 310 [2022-11-16 12:13:35,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=177, Invalid=1312, Unknown=9, NotChecked=308, Total=1806 [2022-11-16 12:13:35,505 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 112 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:35,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 615 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1181 Invalid, 0 Unknown, 640 Unchecked, 1.2s Time] [2022-11-16 12:13:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-16 12:13:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 284. [2022-11-16 12:13:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 229 states have (on average 1.1746724890829694) internal successors, (269), 243 states have internal predecessors, (269), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (37), 25 states have call predecessors, (37), 32 states have call successors, (37) [2022-11-16 12:13:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 346 transitions. [2022-11-16 12:13:35,653 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 346 transitions. Word has length 67 [2022-11-16 12:13:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 346 transitions. [2022-11-16 12:13:35,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 9 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-16 12:13:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 346 transitions. [2022-11-16 12:13:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:13:35,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:35,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:35,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:35,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:13:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2071904462, now seen corresponding path program 2 times [2022-11-16 12:13:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:13:35,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491775014] [2022-11-16 12:13:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:13:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:36,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:13:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:36,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:13:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:13:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:37,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:13:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:13:37,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:13:37,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491775014] [2022-11-16 12:13:37,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491775014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:37,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904173721] [2022-11-16 12:13:37,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:13:37,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:13:37,062 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:13:37,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f93c6d8-dc09-4efa-88e3-d26be065ca95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:13:37,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:13:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 12:13:37,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:37,873 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:13:37,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 12:13:37,909 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-16 12:13:37,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 56 [2022-11-16 12:13:37,948 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-16 12:13:37,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 73 [2022-11-16 12:13:37,961 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 8 treesize of output 7 [2022-11-16 12:13:37,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-16 12:13:37,985 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 8 treesize of output 7 [2022-11-16 12:13:38,016 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-16 12:13:38,039 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 14 treesize of output 13 [2022-11-16 12:13:38,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:38,077 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 47 treesize of output 5 [2022-11-16 12:13:38,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:13:38,120 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 12:13:38,139 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 9 treesize of output 7 [2022-11-16 12:13:38,148 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 27 treesize of output 19 [2022-11-16 12:13:39,461 INFO L321 Elim1Store]: treesize reduction 94, result has 40.5 percent of original size [2022-11-16 12:13:39,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 126 [2022-11-16 12:13:39,535 INFO L321 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2022-11-16 12:13:39,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 99 [2022-11-16 12:13:40,041 INFO L321 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2022-11-16 12:13:40,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 115 [2022-11-16 12:13:40,260 INFO L321 Elim1Store]: treesize reduction 126, result has 51.0 percent of original size [2022-11-16 12:13:40,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 189