./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/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_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro --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-8393723 [2022-11-18 19:47:21,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:47:21,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:47:21,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:47:21,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:47:21,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:47:21,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:47:21,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:47:21,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:47:21,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:47:21,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:47:21,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:47:21,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:47:21,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:47:21,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:47:21,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:47:21,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:47:21,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:47:21,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:47:21,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:47:21,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:47:21,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:47:21,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:47:21,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:47:21,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:47:21,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:47:21,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:47:21,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:47:21,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:47:21,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:47:21,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:47:21,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:47:21,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:47:21,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:47:21,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:47:21,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:47:21,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:47:21,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:47:21,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:47:21,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:47:21,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:47:21,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:47:21,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:47:21,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:47:21,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:47:21,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:47:21,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:47:21,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:47:21,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:47:21,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:47:21,639 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:47:21,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:47:21,641 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:47:21,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:47:21,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:47:21,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:47:21,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:47:21,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:47:21,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:47:21,643 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:47:21,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:47:21,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:47:21,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:47:21,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:47:21,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:47:21,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:47:21,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:47:21,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:47:21,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:47:21,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:47:21,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:47:21,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:47:21,646 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:47:21,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:47:21,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:47:21,647 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_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2022-11-18 19:47:22,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:47:22,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:47:22,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:47:22,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:47:22,046 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:47:22,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-18 19:47:22,131 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/data/78a680f17/0ea2cff0c13c431fa2813f5e1bdaca3b/FLAGc6033b95f [2022-11-18 19:47:22,828 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:47:22,829 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-18 19:47:22,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/data/78a680f17/0ea2cff0c13c431fa2813f5e1bdaca3b/FLAGc6033b95f [2022-11-18 19:47:23,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/data/78a680f17/0ea2cff0c13c431fa2813f5e1bdaca3b [2022-11-18 19:47:23,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:47:23,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:47:23,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:47:23,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:47:23,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:47:23,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1559b1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23, skipping insertion in model container [2022-11-18 19:47:23,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:47:23,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:47:23,548 WARN L234 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_250f3d83-01cf-411d-972c-3004b46e1dd1/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-18 19:47:23,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:47:23,600 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:47:23,664 WARN L234 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_250f3d83-01cf-411d-972c-3004b46e1dd1/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-18 19:47:23,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:47:23,728 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:47:23,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23 WrapperNode [2022-11-18 19:47:23,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:47:23,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:47:23,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:47:23,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:47:23,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,798 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-11-18 19:47:23,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:47:23,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:47:23,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:47:23,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:47:23,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:47:23,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:47:23,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:47:23,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:47:23,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (1/1) ... [2022-11-18 19:47:23,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:47:23,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:23,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:47:23,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:47:23,960 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-18 19:47:23,960 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-18 19:47:23,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:47:23,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:47:23,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:47:23,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:47:23,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:47:23,964 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-18 19:47:23,965 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-18 19:47:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:47:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 19:47:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-18 19:47:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-18 19:47:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:47:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-18 19:47:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-18 19:47:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:47:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:47:24,192 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:47:24,215 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:47:24,650 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:47:24,670 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:47:24,673 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-18 19:47:24,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:47:24 BoogieIcfgContainer [2022-11-18 19:47:24,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:47:24,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:47:24,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:47:24,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:47:24,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:47:23" (1/3) ... [2022-11-18 19:47:24,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e9f8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:47:24, skipping insertion in model container [2022-11-18 19:47:24,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:23" (2/3) ... [2022-11-18 19:47:24,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e9f8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:47:24, skipping insertion in model container [2022-11-18 19:47:24,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:47:24" (3/3) ... [2022-11-18 19:47:24,692 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2022-11-18 19:47:24,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:47:24,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:47:24,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:47:24,833 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;@774789fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:47:24,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:47:24,840 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) [2022-11-18 19:47:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 19:47:24,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:24,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:24,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2022-11-18 19:47:24,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:24,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545108054] [2022-11-18 19:47:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:24,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:47:25,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:25,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545108054] [2022-11-18 19:47:25,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545108054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:25,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:47:25,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:47:25,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526358377] [2022-11-18 19:47:25,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:47:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:47:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:47:25,235 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) [2022-11-18 19:47:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:25,290 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2022-11-18 19:47:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:47:25,294 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 [2022-11-18 19:47:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:25,308 INFO L225 Difference]: With dead ends: 188 [2022-11-18 19:47:25,308 INFO L226 Difference]: Without dead ends: 88 [2022-11-18 19:47:25,318 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 [2022-11-18 19:47:25,326 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 [2022-11-18 19:47:25,329 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] [2022-11-18 19:47:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-18 19:47:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-18 19:47:25,385 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) [2022-11-18 19:47:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-11-18 19:47:25,397 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2022-11-18 19:47:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:25,398 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-11-18 19:47:25,398 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) [2022-11-18 19:47:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-11-18 19:47:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 19:47:25,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:25,400 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] [2022-11-18 19:47:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:47:25,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807145, now seen corresponding path program 1 times [2022-11-18 19:47:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:25,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761919660] [2022-11-18 19:47:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:25,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:27,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:47:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:27,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:47:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:47:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:47:28,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761919660] [2022-11-18 19:47:28,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761919660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723643449] [2022-11-18 19:47:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:28,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:28,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:28,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:28,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:47:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 19:47:29,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:29,212 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 [2022-11-18 19:47:29,527 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:47:29,531 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 [2022-11-18 19:47:29,548 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 [2022-11-18 19:47:29,573 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 [2022-11-18 19:47:29,717 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-18 19:47:29,718 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 [2022-11-18 19:47:29,726 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 [2022-11-18 19:47:29,958 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 [2022-11-18 19:47:30,057 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 [2022-11-18 19:47:30,299 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_328 (Array Int Int)) (v_ArrVal_327 (Array Int Int)) (v_ArrVal_329 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$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 [2022-11-18 19:47:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:30,429 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 19:47:30,430 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 [2022-11-18 19:47:30,436 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 [2022-11-18 19:47:30,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 19:47:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-18 19:47:30,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723643449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:30,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:47:30,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-11-18 19:47:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322414697] [2022-11-18 19:47:30,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:30,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 19:47:30,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 19:47:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=479, Unknown=11, NotChecked=44, Total=600 [2022-11-18 19:47:30,767 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) [2022-11-18 19:47:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:32,424 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-11-18 19:47:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:47:32,425 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 [2022-11-18 19:47:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:32,429 INFO L225 Difference]: With dead ends: 150 [2022-11-18 19:47:32,429 INFO L226 Difference]: Without dead ends: 147 [2022-11-18 19:47:32,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=918, Unknown=13, NotChecked=62, Total=1122 [2022-11-18 19:47:32,431 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 [2022-11-18 19:47:32,432 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] [2022-11-18 19:47:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-18 19:47:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 108. [2022-11-18 19:47:32,450 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) [2022-11-18 19:47:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2022-11-18 19:47:32,452 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 40 [2022-11-18 19:47:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2022-11-18 19:47:32,453 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) [2022-11-18 19:47:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2022-11-18 19:47:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 19:47:32,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:32,455 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] [2022-11-18 19:47:32,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:32,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:32,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash -727961485, now seen corresponding path program 1 times [2022-11-18 19:47:32,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:32,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766827698] [2022-11-18 19:47:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:32,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:47:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:34,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:47:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:34,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:47:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:47:34,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766827698] [2022-11-18 19:47:34,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766827698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585737197] [2022-11-18 19:47:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:34,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:34,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:34,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:34,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:47:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 19:47:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:34,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:47:35,027 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:47:35,028 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 [2022-11-18 19:47:35,035 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 [2022-11-18 19:47:35,045 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 [2022-11-18 19:47:35,092 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 [2022-11-18 19:47:35,096 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 [2022-11-18 19:47:35,302 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:47:35,303 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 [2022-11-18 19:47:35,376 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:47:35,376 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 [2022-11-18 19:47:35,515 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_645 (Array Int Int)) (v_ArrVal_644 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (v_ArrVal_643 (Array Int Int))) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$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 [2022-11-18 19:47:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:35,614 INFO L321 Elim1Store]: treesize reduction 43, result has 47.6 percent of original size [2022-11-18 19:47:35,616 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 [2022-11-18 19:47:35,648 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 6 treesize of output 4 [2022-11-18 19:47:35,755 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 [2022-11-18 19:47:35,820 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 [2022-11-18 19:47:35,987 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_649 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_650 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$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 [2022-11-18 19:47:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:36,077 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-18 19:47:36,077 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 [2022-11-18 19:47:36,089 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 [2022-11-18 19:47:36,113 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 [2022-11-18 19:47:36,138 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 [2022-11-18 19:47:36,254 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-18 19:47:36,255 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 [2022-11-18 19:47:36,264 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 [2022-11-18 19:47:36,314 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 [2022-11-18 19:47:36,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:47:36,672 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 [2022-11-18 19:47:36,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:47:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-18 19:47:36,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:36,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585737197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:36,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:47:36,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 29 [2022-11-18 19:47:36,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174930410] [2022-11-18 19:47:36,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:36,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 19:47:36,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 19:47:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=671, Unknown=5, NotChecked=106, Total=870 [2022-11-18 19:47:36,897 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) [2022-11-18 19:47:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:38,408 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2022-11-18 19:47:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:47:38,409 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 [2022-11-18 19:47:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:38,411 INFO L225 Difference]: With dead ends: 137 [2022-11-18 19:47:38,411 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 19:47:38,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=1317, Unknown=5, NotChecked=150, Total=1640 [2022-11-18 19:47:38,413 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 148 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:38,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 739 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1048 Invalid, 0 Unknown, 384 Unchecked, 0.9s Time] [2022-11-18 19:47:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 19:47:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2022-11-18 19:47:38,432 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) [2022-11-18 19:47:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2022-11-18 19:47:38,434 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 42 [2022-11-18 19:47:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:38,435 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2022-11-18 19:47:38,435 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) [2022-11-18 19:47:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2022-11-18 19:47:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 19:47:38,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:38,438 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] [2022-11-18 19:47:38,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:38,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:38,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:38,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1343975071, now seen corresponding path program 1 times [2022-11-18 19:47:38,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:38,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823288718] [2022-11-18 19:47:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:40,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:47:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:40,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:47:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:47:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:47:43,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:43,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823288718] [2022-11-18 19:47:43,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823288718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046582328] [2022-11-18 19:47:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:43,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:43,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:43,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:47:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-18 19:47:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:43,857 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 [2022-11-18 19:47:43,994 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:47:43,995 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 [2022-11-18 19:47:44,001 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 [2022-11-18 19:47:44,009 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 [2022-11-18 19:47:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:47:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:47:44,037 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 [2022-11-18 19:47:44,041 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 [2022-11-18 19:47:44,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-18 19:47:44,333 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 [2022-11-18 19:47:44,389 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 [2022-11-18 19:47:44,646 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:47:44,647 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 [2022-11-18 19:47:44,658 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 [2022-11-18 19:47:44,671 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 [2022-11-18 19:47:44,709 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 [2022-11-18 19:47:44,715 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 [2022-11-18 19:47:44,815 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 [2022-11-18 19:47:44,829 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-18 19:47:44,829 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 [2022-11-18 19:47:45,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:45,050 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 [2022-11-18 19:47:45,056 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 [2022-11-18 19:47:45,062 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 [2022-11-18 19:47:45,293 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-18 19:47:45,294 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 [2022-11-18 19:47:45,317 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:47:45,317 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 [2022-11-18 19:47:45,500 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:47:45,500 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 [2022-11-18 19:47:45,512 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-18 19:47:45,512 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 [2022-11-18 19:47:45,518 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 [2022-11-18 19:47:45,850 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_982 (Array Int Int)) (|chain_node_~node~0#1.offset| Int) (v_ArrVal_983 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$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 [2022-11-18 19:47:45,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:45,964 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-18 19:47:45,965 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 [2022-11-18 19:47:45,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:45,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:45,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:46,020 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-18 19:47:46,021 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 [2022-11-18 19:47:46,044 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 [2022-11-18 19:47:46,061 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 [2022-11-18 19:47:46,080 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-11-18 19:47:46,081 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 [2022-11-18 19:47:46,097 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 [2022-11-18 19:47:46,142 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 [2022-11-18 19:47:46,169 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 [2022-11-18 19:47:46,468 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 [2022-11-18 19:47:47,134 INFO L321 Elim1Store]: treesize reduction 16, result has 82.8 percent of original size [2022-11-18 19:47:47,134 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 [2022-11-18 19:47:49,951 INFO L321 Elim1Store]: treesize reduction 68, result has 78.3 percent of original size [2022-11-18 19:47:49,951 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 [2022-11-18 19:47:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-18 19:47:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:53,411 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~node~0#1.offset_10| Int) (|v_chain_node_~node~0#1.base_10| Int) (v_ArrVal_1013 (Array Int Int)) (v_ArrVal_1012 (Array Int Int))) (or (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_10|) 0)) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$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 [2022-11-18 19:47:53,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046582328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:53,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:47:53,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 39 [2022-11-18 19:47:53,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232281943] [2022-11-18 19:47:53,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:53,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 19:47:53,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:53,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 19:47:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1618, Unknown=2, NotChecked=162, Total=1892 [2022-11-18 19:47:53,417 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) [2022-11-18 19:47:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:58,154 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2022-11-18 19:47:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 19:47:58,155 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 [2022-11-18 19:47:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:58,159 INFO L225 Difference]: With dead ends: 180 [2022-11-18 19:47:58,159 INFO L226 Difference]: Without dead ends: 177 [2022-11-18 19:47:58,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=230, Invalid=3316, Unknown=2, NotChecked=234, Total=3782 [2022-11-18 19:47:58,162 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 118 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:58,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1301 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1653 Invalid, 0 Unknown, 910 Unchecked, 1.7s Time] [2022-11-18 19:47:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-18 19:47:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2022-11-18 19:47:58,189 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) [2022-11-18 19:47:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2022-11-18 19:47:58,200 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 46 [2022-11-18 19:47:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:58,200 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2022-11-18 19:47:58,201 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) [2022-11-18 19:47:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2022-11-18 19:47:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 19:47:58,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:58,202 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] [2022-11-18 19:47:58,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:58,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:58,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:58,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1320962275, now seen corresponding path program 1 times [2022-11-18 19:47:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161303711] [2022-11-18 19:47:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:47:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:47:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:47:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:47:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:48:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161303711] [2022-11-18 19:48:00,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161303711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59287753] [2022-11-18 19:48:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:00,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:00,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:48:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 19:48:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:00,538 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 14 treesize of output 12 [2022-11-18 19:48:00,728 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:48:00,728 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 [2022-11-18 19:48:00,734 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 [2022-11-18 19:48:00,742 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 [2022-11-18 19:48:00,766 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 [2022-11-18 19:48:00,770 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 [2022-11-18 19:48:00,905 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 [2022-11-18 19:48:00,976 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 [2022-11-18 19:48:01,118 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1405 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:48:01,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,154 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 [2022-11-18 19:48:01,160 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 [2022-11-18 19:48:01,283 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 [2022-11-18 19:48:01,423 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_1409 (Array Int Int)) (v_ArrVal_1408 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$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 [2022-11-18 19:48:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,451 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 [2022-11-18 19:48:01,457 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 [2022-11-18 19:48:01,461 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 [2022-11-18 19:48:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:01,608 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 [2022-11-18 19:48:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-18 19:48:01,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59287753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:01,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:48:01,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2022-11-18 19:48:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419828730] [2022-11-18 19:48:01,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 19:48:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 19:48:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=767, Unknown=10, NotChecked=114, Total=992 [2022-11-18 19:48:01,861 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) [2022-11-18 19:48:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:03,341 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2022-11-18 19:48:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:48:03,341 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 [2022-11-18 19:48:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:03,343 INFO L225 Difference]: With dead ends: 206 [2022-11-18 19:48:03,344 INFO L226 Difference]: Without dead ends: 203 [2022-11-18 19:48:03,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1458, Unknown=10, NotChecked=158, Total=1806 [2022-11-18 19:48:03,346 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 [2022-11-18 19:48:03,346 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] [2022-11-18 19:48:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-18 19:48:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 161. [2022-11-18 19:48:03,374 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) [2022-11-18 19:48:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 201 transitions. [2022-11-18 19:48:03,375 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 201 transitions. Word has length 49 [2022-11-18 19:48:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:03,376 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 201 transitions. [2022-11-18 19:48:03,376 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) [2022-11-18 19:48:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 201 transitions. [2022-11-18 19:48:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 19:48:03,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:03,378 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] [2022-11-18 19:48:03,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:03,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:03,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2055778686, now seen corresponding path program 1 times [2022-11-18 19:48:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:03,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93749374] [2022-11-18 19:48:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:05,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:48:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:05,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:48:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:48:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:07,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:48:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:48:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93749374] [2022-11-18 19:48:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93749374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781029380] [2022-11-18 19:48:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:07,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:08,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:08,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:48:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-18 19:48:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:08,318 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 [2022-11-18 19:48:08,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:48:08,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:08,521 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 [2022-11-18 19:48:08,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:08,531 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 [2022-11-18 19:48:08,626 INFO L321 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2022-11-18 19:48:08,627 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 [2022-11-18 19:48:08,684 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-18 19:48:08,684 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 [2022-11-18 19:48:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,098 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 [2022-11-18 19:48:09,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:09,111 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 [2022-11-18 19:48:09,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:09,237 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 [2022-11-18 19:48:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,247 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 [2022-11-18 19:48:09,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:48:09,510 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1746 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1741 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$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 [2022-11-18 19:48:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,601 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-18 19:48:09,602 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 [2022-11-18 19:48:09,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:09,630 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 [2022-11-18 19:48:09,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2022-11-18 19:48:09,654 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 [2022-11-18 19:48:09,664 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 [2022-11-18 19:48:09,673 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 [2022-11-18 19:48:09,691 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-18 19:48:09,691 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 [2022-11-18 19:48:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:11,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:48:11,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:11,102 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 [2022-11-18 19:48:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:11,123 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:48:11,124 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 [2022-11-18 19:48:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-18 19:48:11,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:11,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781029380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:11,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:48:11,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-11-18 19:48:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50323939] [2022-11-18 19:48:11,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:11,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:48:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:48:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=621, Unknown=1, NotChecked=50, Total=756 [2022-11-18 19:48:11,895 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) [2022-11-18 19:48:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:14,170 INFO L93 Difference]: Finished difference Result 196 states and 242 transitions. [2022-11-18 19:48:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:48:14,171 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 [2022-11-18 19:48:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:14,173 INFO L225 Difference]: With dead ends: 196 [2022-11-18 19:48:14,173 INFO L226 Difference]: Without dead ends: 193 [2022-11-18 19:48:14,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=152, Invalid=1110, Unknown=2, NotChecked=68, Total=1332 [2022-11-18 19:48:14,175 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:14,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 757 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 824 Invalid, 0 Unknown, 414 Unchecked, 0.9s Time] [2022-11-18 19:48:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-18 19:48:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2022-11-18 19:48:14,200 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) [2022-11-18 19:48:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2022-11-18 19:48:14,202 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 50 [2022-11-18 19:48:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:14,202 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2022-11-18 19:48:14,202 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) [2022-11-18 19:48:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2022-11-18 19:48:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 19:48:14,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:14,204 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] [2022-11-18 19:48:14,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:14,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:48:14,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1969592115, now seen corresponding path program 1 times [2022-11-18 19:48:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149228405] [2022-11-18 19:48:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:16,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:48:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:48:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:18,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:48:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:48:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149228405] [2022-11-18 19:48:20,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149228405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867458066] [2022-11-18 19:48:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:20,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:20,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:48:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 184 conjunts are in the unsatisfiable core [2022-11-18 19:48:20,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:20,599 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:48:20,599 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 [2022-11-18 19:48:20,868 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:48:20,868 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 [2022-11-18 19:48:20,898 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:48:20,898 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 [2022-11-18 19:48:20,906 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 [2022-11-18 19:48:20,950 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 [2022-11-18 19:48:20,959 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 [2022-11-18 19:48:20,967 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 [2022-11-18 19:48:20,996 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 [2022-11-18 19:48:21,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:48:21,040 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 [2022-11-18 19:48:21,043 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 [2022-11-18 19:48:21,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:48:21,348 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 [2022-11-18 19:48:21,375 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 [2022-11-18 19:48:21,494 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 [2022-11-18 19:48:21,499 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 [2022-11-18 19:48:21,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:48:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:21,976 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 [2022-11-18 19:48:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:21,987 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 [2022-11-18 19:48:22,001 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 [2022-11-18 19:48:22,012 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 [2022-11-18 19:48:22,035 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 [2022-11-18 19:48:22,043 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 [2022-11-18 19:48:22,353 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-18 19:48:22,354 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 [2022-11-18 19:48:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,367 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 [2022-11-18 19:48:22,549 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-18 19:48:22,550 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 [2022-11-18 19:48:22,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:48:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,572 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 [2022-11-18 19:48:22,889 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2105 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2102 (Array Int Int)) (v_ArrVal_2110 (Array Int Int))) (and (= |c_#memory_$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 [2022-11-18 19:48:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,962 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-18 19:48:22,962 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 [2022-11-18 19:48:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,987 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 [2022-11-18 19:48:23,004 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 [2022-11-18 19:48:23,012 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 [2022-11-18 19:48:23,023 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 [2022-11-18 19:48:23,046 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-18 19:48:23,047 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 [2022-11-18 19:48:24,749 INFO L321 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2022-11-18 19:48:24,750 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 [2022-11-18 19:48:24,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:24,772 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:48:24,773 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 [2022-11-18 19:48:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-18 19:48:24,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867458066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:25,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:48:25,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2022-11-18 19:48:25,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514183887] [2022-11-18 19:48:25,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:25,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 19:48:25,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:25,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 19:48:25,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1439, Unknown=1, NotChecked=76, Total=1640 [2022-11-18 19:48:25,611 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) [2022-11-18 19:48:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:27,717 INFO L93 Difference]: Finished difference Result 248 states and 300 transitions. [2022-11-18 19:48:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:48:27,719 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 [2022-11-18 19:48:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:27,721 INFO L225 Difference]: With dead ends: 248 [2022-11-18 19:48:27,721 INFO L226 Difference]: Without dead ends: 178 [2022-11-18 19:48:27,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=185, Invalid=2074, Unknown=1, NotChecked=92, Total=2352 [2022-11-18 19:48:27,723 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 [2022-11-18 19:48:27,726 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] [2022-11-18 19:48:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-18 19:48:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2022-11-18 19:48:27,758 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) [2022-11-18 19:48:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 205 transitions. [2022-11-18 19:48:27,760 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 205 transitions. Word has length 50 [2022-11-18 19:48:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:27,761 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 205 transitions. [2022-11-18 19:48:27,761 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) [2022-11-18 19:48:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 205 transitions. [2022-11-18 19:48:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 19:48:27,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:27,762 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] [2022-11-18 19:48:27,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:27,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:27,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1872718035, now seen corresponding path program 1 times [2022-11-18 19:48:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:27,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804566131] [2022-11-18 19:48:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:27,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:48:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:29,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:48:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:48:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:29,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:48:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 19:48:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804566131] [2022-11-18 19:48:29,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804566131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754552220] [2022-11-18 19:48:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:29,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:29,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:29,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:48:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:30,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-18 19:48:30,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:30,299 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:48:30,299 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 [2022-11-18 19:48:30,322 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 [2022-11-18 19:48:30,329 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 [2022-11-18 19:48:30,355 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 [2022-11-18 19:48:30,358 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 [2022-11-18 19:48:30,542 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:48:30,542 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 [2022-11-18 19:48:30,608 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:48:30,608 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 [2022-11-18 19:48:30,755 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_2520 (Array Int Int)) (v_ArrVal_2518 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$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 [2022-11-18 19:48:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:30,805 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-18 19:48:30,805 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 [2022-11-18 19:48:30,814 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 [2022-11-18 19:48:30,840 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 [2022-11-18 19:48:31,019 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-18 19:48:31,019 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 [2022-11-18 19:48:31,181 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-18 19:48:31,181 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 [2022-11-18 19:48:31,278 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2525 (Array Int Int)) (v_ArrVal_2524 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:48:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:31,367 INFO L321 Elim1Store]: treesize reduction 41, result has 48.1 percent of original size [2022-11-18 19:48:31,367 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 [2022-11-18 19:48:31,390 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 [2022-11-18 19:48:31,405 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 [2022-11-18 19:48:31,414 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 [2022-11-18 19:48:31,515 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 [2022-11-18 19:48:31,594 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2528 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2529 (Array Int Int))) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:48:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:31,648 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-18 19:48:31,648 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 [2022-11-18 19:48:31,656 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 [2022-11-18 19:48:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:31,698 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 [2022-11-18 19:48:31,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:31,837 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 [2022-11-18 19:48:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-18 19:48:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:32,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754552220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:32,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:48:32,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 31 [2022-11-18 19:48:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957063603] [2022-11-18 19:48:32,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:32,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 19:48:32,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 19:48:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=722, Unknown=4, NotChecked=168, Total=992 [2022-11-18 19:48:32,042 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) [2022-11-18 19:48:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:33,393 INFO L93 Difference]: Finished difference Result 200 states and 242 transitions. [2022-11-18 19:48:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:48:33,393 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 [2022-11-18 19:48:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:33,395 INFO L225 Difference]: With dead ends: 200 [2022-11-18 19:48:33,395 INFO L226 Difference]: Without dead ends: 197 [2022-11-18 19:48:33,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=1529, Unknown=4, NotChecked=246, Total=1980 [2022-11-18 19:48:33,397 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 [2022-11-18 19:48:33,397 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] [2022-11-18 19:48:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-18 19:48:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2022-11-18 19:48:33,432 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) [2022-11-18 19:48:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2022-11-18 19:48:33,434 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 51 [2022-11-18 19:48:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:33,434 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2022-11-18 19:48:33,435 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) [2022-11-18 19:48:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2022-11-18 19:48:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 19:48:33,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:33,436 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] [2022-11-18 19:48:33,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:33,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1808852267, now seen corresponding path program 1 times [2022-11-18 19:48:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:33,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575401742] [2022-11-18 19:48:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:36,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:48:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:48:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:48:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:40,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:48:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:48:41,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575401742] [2022-11-18 19:48:41,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575401742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798768774] [2022-11-18 19:48:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:41,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:41,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:41,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:48:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:41,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 237 conjunts are in the unsatisfiable core [2022-11-18 19:48:41,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:41,419 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-18 19:48:41,419 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 [2022-11-18 19:48:41,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:48:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:41,707 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 [2022-11-18 19:48:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:41,732 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 [2022-11-18 19:48:41,891 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-18 19:48:41,891 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 [2022-11-18 19:48:41,900 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 [2022-11-18 19:48:41,951 INFO L321 Elim1Store]: treesize reduction 46, result has 34.3 percent of original size [2022-11-18 19:48:41,951 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 [2022-11-18 19:48:41,999 INFO L321 Elim1Store]: treesize reduction 19, result has 57.8 percent of original size [2022-11-18 19:48:41,999 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 [2022-11-18 19:48:42,008 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 [2022-11-18 19:48:42,053 INFO L321 Elim1Store]: treesize reduction 56, result has 34.9 percent of original size [2022-11-18 19:48:42,054 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 [2022-11-18 19:48:42,096 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 [2022-11-18 19:48:42,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:48:42,142 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 [2022-11-18 19:48:42,164 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 [2022-11-18 19:48:42,222 INFO L321 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2022-11-18 19:48:42,222 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 [2022-11-18 19:48:42,321 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-18 19:48:42,322 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 [2022-11-18 19:48:42,375 INFO L321 Elim1Store]: treesize reduction 44, result has 26.7 percent of original size [2022-11-18 19:48:42,376 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 [2022-11-18 19:48:42,400 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-18 19:48:42,401 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 [2022-11-18 19:48:42,446 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:48:42,446 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 [2022-11-18 19:48:42,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:48:42,479 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 [2022-11-18 19:48:42,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:42,492 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 [2022-11-18 19:48:42,526 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 [2022-11-18 19:48:42,741 INFO L321 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-11-18 19:48:42,741 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 [2022-11-18 19:48:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,154 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 [2022-11-18 19:48:43,170 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-18 19:48:43,170 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 [2022-11-18 19:48:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,336 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 [2022-11-18 19:48:43,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:43,344 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 [2022-11-18 19:48:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,350 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 [2022-11-18 19:48:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,957 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-18 19:48:43,958 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 [2022-11-18 19:48:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:43,978 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 [2022-11-18 19:48:43,992 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 [2022-11-18 19:48:44,001 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 [2022-11-18 19:48:44,007 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 [2022-11-18 19:48:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,044 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-18 19:48:44,044 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 [2022-11-18 19:48:44,055 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 [2022-11-18 19:48:44,530 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 19:48:44,530 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 [2022-11-18 19:48:44,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,584 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:48:44,584 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 [2022-11-18 19:48:44,870 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-18 19:48:44,870 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 [2022-11-18 19:48:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,895 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:48:44,895 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 [2022-11-18 19:48:44,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:44,905 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 [2022-11-18 19:48:45,179 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2887 (Array Int Int)) (v_ArrVal_2886 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2883 (Array Int Int)) (v_ArrVal_2893 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$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 [2022-11-18 19:48:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,302 INFO L321 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2022-11-18 19:48:45,303 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 [2022-11-18 19:48:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,352 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:48:45,352 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 [2022-11-18 19:48:45,372 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 [2022-11-18 19:48:45,385 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 [2022-11-18 19:48:45,394 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 [2022-11-18 19:48:45,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:45,425 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-18 19:48:45,426 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 [2022-11-18 19:48:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:48:50,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:48:50,237 INFO L321 Elim1Store]: treesize reduction 74, result has 16.9 percent of original size [2022-11-18 19:48:50,237 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 [2022-11-18 19:48:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:50,272 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:48:50,272 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 [2022-11-18 19:48:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-18 19:48:50,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:33,746 WARN L233 SmtUtils]: Spent 10.14s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:49:44,258 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:49:54,975 WARN L233 SmtUtils]: Spent 10.19s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:49:56,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798768774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:56,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:56,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 49 [2022-11-18 19:49:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590222835] [2022-11-18 19:49:56,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:56,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 19:49:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 19:49:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2970, Unknown=12, NotChecked=110, Total=3306 [2022-11-18 19:49:56,114 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) [2022-11-18 19:50:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:00,280 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2022-11-18 19:50:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 19:50:00,280 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 [2022-11-18 19:50:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:00,283 INFO L225 Difference]: With dead ends: 227 [2022-11-18 19:50:00,283 INFO L226 Difference]: Without dead ends: 224 [2022-11-18 19:50:00,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=324, Invalid=4360, Unknown=12, NotChecked=134, Total=4830 [2022-11-18 19:50:00,286 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 113 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:00,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1378 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1808 Invalid, 0 Unknown, 684 Unchecked, 2.4s Time] [2022-11-18 19:50:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-18 19:50:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 194. [2022-11-18 19:50:00,330 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) [2022-11-18 19:50:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 229 transitions. [2022-11-18 19:50:00,333 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 229 transitions. Word has length 53 [2022-11-18 19:50:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:00,333 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 229 transitions. [2022-11-18 19:50:00,333 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) [2022-11-18 19:50:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 229 transitions. [2022-11-18 19:50:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 19:50:00,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:00,335 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] [2022-11-18 19:50:00,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:00,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:00,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash 830072921, now seen corresponding path program 1 times [2022-11-18 19:50:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:00,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869069659] [2022-11-18 19:50:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:00,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:03,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:03,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:50:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:50:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:50:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:08,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869069659] [2022-11-18 19:50:08,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869069659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:08,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804950803] [2022-11-18 19:50:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:08,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:08,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:08,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:50:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-18 19:50:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:08,538 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 14 treesize of output 12 [2022-11-18 19:50:08,660 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:50:08,661 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 [2022-11-18 19:50:08,672 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 [2022-11-18 19:50:08,678 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 [2022-11-18 19:50:08,725 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-18 19:50:08,725 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 [2022-11-18 19:50:08,727 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 [2022-11-18 19:50:09,178 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 19:50:09,178 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 [2022-11-18 19:50:09,208 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 [2022-11-18 19:50:09,334 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 [2022-11-18 19:50:09,418 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 [2022-11-18 19:50:09,741 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:50:09,742 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 [2022-11-18 19:50:09,753 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 8 treesize of output 7 [2022-11-18 19:50:09,763 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 [2022-11-18 19:50:09,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:50:09,829 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 [2022-11-18 19:50:09,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:09,869 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:50:09,870 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 [2022-11-18 19:50:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:10,211 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 [2022-11-18 19:50:10,219 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 [2022-11-18 19:50:10,235 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 [2022-11-18 19:50:10,597 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 19:50:10,597 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 [2022-11-18 19:50:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:10,613 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 [2022-11-18 19:50:10,620 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 [2022-11-18 19:50:10,764 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-18 19:50:10,765 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 [2022-11-18 19:50:10,769 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 [2022-11-18 19:50:10,774 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 [2022-11-18 19:50:11,068 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~ppnode#1.offset| Int) (v_ArrVal_3320 (Array Int Int)) (v_ArrVal_3321 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3327 (Array Int Int)) (v_ArrVal_3328 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:50:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,143 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-18 19:50:11,144 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 [2022-11-18 19:50:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,159 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 [2022-11-18 19:50:11,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:11,176 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 [2022-11-18 19:50:11,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:11,195 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 [2022-11-18 19:50:11,222 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-18 19:50:11,223 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 [2022-11-18 19:50:11,234 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 [2022-11-18 19:50:11,242 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 [2022-11-18 19:50:11,504 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:50:11,504 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 [2022-11-18 19:50:11,508 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 [2022-11-18 19:50:11,513 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 [2022-11-18 19:50:11,737 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~ppnode#1.offset| Int) (v_ArrVal_3333 (Array Int Int)) (v_ArrVal_3334 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3336 (Array Int Int)) (v_ArrVal_3339 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:50:11,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,788 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 [2022-11-18 19:50:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:11,818 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-18 19:50:11,818 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 [2022-11-18 19:50:11,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:50:11,842 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 [2022-11-18 19:50:11,862 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-18 19:50:11,863 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 [2022-11-18 19:50:11,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 19:50:12,355 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:50:12,355 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 [2022-11-18 19:50:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 18 refuted. 2 times theorem prover too weak. 1 trivial. 10 not checked. [2022-11-18 19:50:12,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:12,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804950803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:12,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:50:12,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 47 [2022-11-18 19:50:12,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903834911] [2022-11-18 19:50:12,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:12,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 19:50:12,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 19:50:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1919, Unknown=11, NotChecked=178, Total=2256 [2022-11-18 19:50:12,701 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) [2022-11-18 19:50:14,593 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))) (let ((.cse0 (not (= .cse1 0)))) (and (= |c_ULTIMATE.start_create_sll_~pp1#1.offset| 0) (or (and .cse0 (exists ((v_DerPreprocessor_26 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (and (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_25) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_DerPreprocessor_26) .cse1 v_DerPreprocessor_25) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_DerPreprocessor_26) .cse1)) (= (select v_DerPreprocessor_26 |c_ULTIMATE.start_create_sll_~#list~0#1.offset|) .cse1)))) (and (= .cse1 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) (not (= |c_ULTIMATE.start_create_sll_~#list~0#1.base| 0)))) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#p1~0#1.base|) .cse0 (not (= |c_ULTIMATE.start_create_sll_~pp2#1.base| |c_ULTIMATE.start_create_sll_~#list~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) (<= (+ |c_#StackHeapBarrier| 1) |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 (= |c_ULTIMATE.start_create_sll_~pp2#1.base| |c_ULTIMATE.start_create_sll_~pp1#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| 0)))) is different from true [2022-11-18 19:50:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:16,495 INFO L93 Difference]: Finished difference Result 325 states and 390 transitions. [2022-11-18 19:50:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 19:50:16,495 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 [2022-11-18 19:50:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:16,498 INFO L225 Difference]: With dead ends: 325 [2022-11-18 19:50:16,498 INFO L226 Difference]: Without dead ends: 322 [2022-11-18 19:50:16,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=253, Invalid=3051, Unknown=14, NotChecked=342, Total=3660 [2022-11-18 19:50:16,500 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 126 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 706 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:16,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 904 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1413 Invalid, 0 Unknown, 706 Unchecked, 1.3s Time] [2022-11-18 19:50:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-18 19:50:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 275. [2022-11-18 19:50:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 223 states have (on average 1.201793721973094) internal successors, (268), 237 states have internal predecessors, (268), 38 states have call successors, (38), 14 states have call predecessors, (38), 13 states have return successors, (30), 23 states have call predecessors, (30), 29 states have call successors, (30) [2022-11-18 19:50:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 336 transitions. [2022-11-18 19:50:16,549 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 336 transitions. Word has length 55 [2022-11-18 19:50:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:16,549 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 336 transitions. [2022-11-18 19:50:16,549 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) [2022-11-18 19:50:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 336 transitions. [2022-11-18 19:50:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 19:50:16,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:16,551 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] [2022-11-18 19:50:16,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:16,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:50:16,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash 992893756, now seen corresponding path program 1 times [2022-11-18 19:50:16,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:16,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638501762] [2022-11-18 19:50:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:16,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:19,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:50:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:50:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:24,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:50:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:50:24,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:24,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638501762] [2022-11-18 19:50:24,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638501762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:24,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372072090] [2022-11-18 19:50:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:24,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:50:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 223 conjunts are in the unsatisfiable core [2022-11-18 19:50:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:24,618 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 [2022-11-18 19:50:24,736 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:50:24,736 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 [2022-11-18 19:50:24,742 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 [2022-11-18 19:50:24,748 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 [2022-11-18 19:50:24,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:24,791 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 [2022-11-18 19:50:24,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:24,966 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 [2022-11-18 19:50:25,062 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 [2022-11-18 19:50:25,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:50:25,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:25,208 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 [2022-11-18 19:50:25,360 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-18 19:50:25,361 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 [2022-11-18 19:50:25,408 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-18 19:50:25,409 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 [2022-11-18 19:50:25,426 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 [2022-11-18 19:50:25,449 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 [2022-11-18 19:50:25,475 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 [2022-11-18 19:50:25,532 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 [2022-11-18 19:50:25,560 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 126 treesize of output 100 [2022-11-18 19:50:25,651 INFO L321 Elim1Store]: treesize reduction 61, result has 7.6 percent of original size [2022-11-18 19:50:25,651 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 [2022-11-18 19:50:25,842 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-11-18 19:50:25,843 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 [2022-11-18 19:50:25,892 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-18 19:50:25,893 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 [2022-11-18 19:50:26,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:50:26,352 INFO L321 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2022-11-18 19:50:26,353 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 [2022-11-18 19:50:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:26,497 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 [2022-11-18 19:50:26,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:26,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:26,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:26,935 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 [2022-11-18 19:50:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:26,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:26,951 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 [2022-11-18 19:50:26,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:26,972 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 [2022-11-18 19:50:27,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:27,152 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 [2022-11-18 19:50:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,161 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 [2022-11-18 19:50:27,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:50:27,514 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3772 (Array Int Int)) (v_ArrVal_3773 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3778 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= |c_#memory_$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 [2022-11-18 19:50:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,586 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 [2022-11-18 19:50:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:27,618 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-18 19:50:27,618 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 [2022-11-18 19:50:27,629 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 [2022-11-18 19:50:27,652 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 [2022-11-18 19:50:27,694 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-18 19:50:27,694 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 [2022-11-18 19:50:27,713 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 [2022-11-18 19:50:28,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:28,272 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 [2022-11-18 19:50:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,293 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 [2022-11-18 19:50:28,301 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 [2022-11-18 19:50:28,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,907 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 [2022-11-18 19:50:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:28,941 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-18 19:50:28,941 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 [2022-11-18 19:50:28,971 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-18 19:50:28,972 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 [2022-11-18 19:50:28,983 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 [2022-11-18 19:50:28,994 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 [2022-11-18 19:50:29,004 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 [2022-11-18 19:50:29,013 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 [2022-11-18 19:50:31,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:50:31,598 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-18 19:50:31,598 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 [2022-11-18 19:50:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:31,655 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-11-18 19:50:31,656 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 [2022-11-18 19:50:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-18 19:50:31,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:47,416 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:50:57,805 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:51:08,283 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:51:09,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372072090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:09,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:51:09,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30] total 47 [2022-11-18 19:51:09,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152235293] [2022-11-18 19:51:09,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:09,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 19:51:09,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:09,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 19:51:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2538, Unknown=4, NotChecked=102, Total=2862 [2022-11-18 19:51:09,363 INFO L87 Difference]: Start difference. First operand 275 states and 336 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) [2022-11-18 19:51:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:14,260 INFO L93 Difference]: Finished difference Result 323 states and 392 transitions. [2022-11-18 19:51:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:51:14,261 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 [2022-11-18 19:51:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:14,263 INFO L225 Difference]: With dead ends: 323 [2022-11-18 19:51:14,264 INFO L226 Difference]: Without dead ends: 320 [2022-11-18 19:51:14,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=314, Invalid=3718, Unknown=4, NotChecked=124, Total=4160 [2022-11-18 19:51:14,266 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 822 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:14,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 901 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 890 Invalid, 0 Unknown, 822 Unchecked, 1.2s Time] [2022-11-18 19:51:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-18 19:51:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 266. [2022-11-18 19:51:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 229 states have internal predecessors, (257), 37 states have call successors, (37), 14 states have call predecessors, (37), 13 states have return successors, (31), 22 states have call predecessors, (31), 29 states have call successors, (31) [2022-11-18 19:51:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 325 transitions. [2022-11-18 19:51:14,353 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 325 transitions. Word has length 59 [2022-11-18 19:51:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:14,353 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 325 transitions. [2022-11-18 19:51:14,354 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) [2022-11-18 19:51:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 325 transitions. [2022-11-18 19:51:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 19:51:14,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:14,356 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] [2022-11-18 19:51:14,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:14,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:51:14,565 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1079080327, now seen corresponding path program 1 times [2022-11-18 19:51:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:14,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88632810] [2022-11-18 19:51:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:17,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:51:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:17,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:51:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:51:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:51:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:51:25,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:25,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88632810] [2022-11-18 19:51:25,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88632810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:25,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758231514] [2022-11-18 19:51:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:25,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:25,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:25,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:51:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 241 conjunts are in the unsatisfiable core [2022-11-18 19:51:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:26,427 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-18 19:51:26,427 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 [2022-11-18 19:51:26,643 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 [2022-11-18 19:51:27,007 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:51:27,008 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 [2022-11-18 19:51:27,047 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:51:27,047 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 [2022-11-18 19:51:27,058 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 [2022-11-18 19:51:27,070 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 [2022-11-18 19:51:27,082 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 [2022-11-18 19:51:27,095 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 [2022-11-18 19:51:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:51:27,134 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 [2022-11-18 19:51:27,139 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 5 treesize of output 3 [2022-11-18 19:51:27,194 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 [2022-11-18 19:51:27,199 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 [2022-11-18 19:51:27,607 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-18 19:51:27,607 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 [2022-11-18 19:51:27,668 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 19:51:27,670 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 [2022-11-18 19:51:30,480 INFO L321 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2022-11-18 19:51:30,480 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 [2022-11-18 19:51:30,527 INFO L321 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2022-11-18 19:51:30,527 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 [2022-11-18 19:51:30,565 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 [2022-11-18 19:51:30,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:51:30,686 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 [2022-11-18 19:51:30,758 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 [2022-11-18 19:51:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:31,237 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-18 19:51:31,238 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 [2022-11-18 19:51:31,250 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 [2022-11-18 19:51:31,258 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 [2022-11-18 19:51:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,095 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 [2022-11-18 19:51:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,113 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 [2022-11-18 19:51:32,124 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 [2022-11-18 19:51:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,167 INFO L321 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2022-11-18 19:51:32,168 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 [2022-11-18 19:51:32,181 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 [2022-11-18 19:51:32,191 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 [2022-11-18 19:51:32,283 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 [2022-11-18 19:51:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:32,711 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 [2022-11-18 19:51:32,735 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-18 19:51:32,735 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 [2022-11-18 19:51:32,997 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-18 19:51:32,997 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 [2022-11-18 19:51:33,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,011 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 [2022-11-18 19:51:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,020 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 [2022-11-18 19:51:33,423 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4233 (Array Int Int)) (v_ArrVal_4235 (Array Int Int)) (v_ArrVal_4236 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_4238 (Array Int Int))) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:51:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,535 INFO L321 Elim1Store]: treesize reduction 58, result has 7.9 percent of original size [2022-11-18 19:51:33,536 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 [2022-11-18 19:51:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,559 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 [2022-11-18 19:51:33,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:51:33,582 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 [2022-11-18 19:51:33,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:33,636 INFO L321 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2022-11-18 19:51:33,637 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 [2022-11-18 19:51:34,205 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-18 19:51:34,206 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 [2022-11-18 19:51:34,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,225 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 [2022-11-18 19:51:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,237 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 [2022-11-18 19:51:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,004 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 [2022-11-18 19:51:35,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,077 INFO L321 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2022-11-18 19:51:35,077 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 [2022-11-18 19:51:35,119 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 [2022-11-18 19:51:35,133 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 [2022-11-18 19:51:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:35,178 INFO L321 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-11-18 19:51:35,179 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 [2022-11-18 19:51:35,191 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 [2022-11-18 19:51:38,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:38,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:38,086 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:51:38,087 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 [2022-11-18 19:51:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 2 times theorem prover too weak. 4 trivial. 6 not checked. [2022-11-18 19:51:38,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:40,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758231514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:40,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:51:40,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2022-11-18 19:51:40,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102472316] [2022-11-18 19:51:40,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:40,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 19:51:40,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 19:51:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3328, Unknown=5, NotChecked=116, Total=3660 [2022-11-18 19:51:40,826 INFO L87 Difference]: Start difference. First operand 266 states and 325 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) [2022-11-18 19:51:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:48,113 INFO L93 Difference]: Finished difference Result 450 states and 552 transitions. [2022-11-18 19:51:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:51:48,115 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 [2022-11-18 19:51:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:48,118 INFO L225 Difference]: With dead ends: 450 [2022-11-18 19:51:48,118 INFO L226 Difference]: Without dead ends: 373 [2022-11-18 19:51:48,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=387, Invalid=5310, Unknown=7, NotChecked=148, Total=5852 [2022-11-18 19:51:48,122 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 139 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 915 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:48,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1190 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1532 Invalid, 0 Unknown, 915 Unchecked, 3.0s Time] [2022-11-18 19:51:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-18 19:51:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 292. [2022-11-18 19:51:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 235 states have (on average 1.195744680851064) internal successors, (281), 250 states have internal predecessors, (281), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (36), 26 states have call predecessors, (36), 34 states have call successors, (36) [2022-11-18 19:51:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 359 transitions. [2022-11-18 19:51:48,236 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 359 transitions. Word has length 59 [2022-11-18 19:51:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:48,236 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 359 transitions. [2022-11-18 19:51:48,236 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) [2022-11-18 19:51:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 359 transitions. [2022-11-18 19:51:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 19:51:48,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:48,238 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] [2022-11-18 19:51:48,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:48,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:51:48,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1740102043, now seen corresponding path program 1 times [2022-11-18 19:51:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:48,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314522992] [2022-11-18 19:51:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:50,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:51:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:50,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:51:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-18 19:51:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:51,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:51:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:51:54,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314522992] [2022-11-18 19:51:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314522992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077725525] [2022-11-18 19:51:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:54,343 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:54,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:51:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 174 conjunts are in the unsatisfiable core [2022-11-18 19:51:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:54,827 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 14 treesize of output 12 [2022-11-18 19:51:54,963 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:51:54,963 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 [2022-11-18 19:51:54,970 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 [2022-11-18 19:51:54,977 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 [2022-11-18 19:51:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:51:54,992 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 [2022-11-18 19:51:54,996 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 [2022-11-18 19:51:55,029 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$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 [2022-11-18 19:51:55,086 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#p1~0#1.base|) (not (= |c_ULTIMATE.start_create_sll_~pp2#1.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|)) (= |c_ULTIMATE.start_main_~#p1~0#1.offset| |c_ULTIMATE.start_create_sll_~pp1#1.offset|) (= |c_ULTIMATE.start_create_sll_~#list~0#1.offset| 0) (= |c_ULTIMATE.start_main_~#p1~0#1.base| |c_ULTIMATE.start_create_sll_~pp1#1.base|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_create_sll_~#list~0#1.base|) (not (= |c_ULTIMATE.start_main_~#p1~0#1.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))) (or (and (= .cse0 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) (not (= .cse0 0))) (exists ((v_DerPreprocessor_51 (Array Int Int)) (v_DerPreprocessor_52 (Array Int Int))) (let ((.cse1 (select v_DerPreprocessor_52 |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))) (and (= .cse1 .cse0) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_51) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_DerPreprocessor_52) .cse1 v_DerPreprocessor_51) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_DerPreprocessor_52) .cse1)) (not (= .cse1 0))))))) (= |c_ULTIMATE.start_main_~#p1~0#1.offset| 0)) is different from true [2022-11-18 19:51:55,207 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-18 19:51:55,208 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 [2022-11-18 19:51:55,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 19:51:55,345 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 8 treesize of output 4 [2022-11-18 19:51:55,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:51:55,631 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:51:55,631 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 [2022-11-18 19:51:55,642 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 [2022-11-18 19:51:55,653 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 [2022-11-18 19:51:55,723 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 [2022-11-18 19:51:55,730 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 [2022-11-18 19:51:55,744 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-18 19:51:58,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:58,026 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 [2022-11-18 19:51:58,035 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 [2022-11-18 19:51:58,042 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 [2022-11-18 19:51:58,355 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-18 19:51:58,355 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 [2022-11-18 19:51:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:58,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:58,365 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 [2022-11-18 19:51:58,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:51:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,126 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 [2022-11-18 19:51:59,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,163 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-18 19:51:59,164 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 [2022-11-18 19:51:59,175 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 [2022-11-18 19:51:59,186 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 [2022-11-18 19:51:59,196 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 [2022-11-18 19:51:59,208 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 [2022-11-18 19:51:59,239 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-18 19:51:59,240 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 [2022-11-18 19:51:59,250 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 [2022-11-18 19:51:59,651 INFO L321 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2022-11-18 19:51:59,651 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 [2022-11-18 19:51:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:59,662 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 [2022-11-18 19:51:59,917 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-18 19:51:59,917 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 [2022-11-18 19:51:59,925 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 [2022-11-18 19:51:59,931 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 [2022-11-18 19:52:00,185 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4693 (Array Int Int)) (|chain_node_~ppnode#1.offset| Int) (v_ArrVal_4694 (Array Int Int)) (v_ArrVal_4695 (Array Int Int)) (v_ArrVal_4687 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:52:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,277 INFO L321 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2022-11-18 19:52:00,278 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 [2022-11-18 19:52:00,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:52:00,304 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 [2022-11-18 19:52:00,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:00,329 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 [2022-11-18 19:52:00,337 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 [2022-11-18 19:52:00,368 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-18 19:52:00,368 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 [2022-11-18 19:52:00,375 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 [2022-11-18 19:52:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:01,190 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:52:01,190 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 [2022-11-18 19:52:01,405 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-18 19:52:01,405 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 [2022-11-18 19:52:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 20 refuted. 2 times theorem prover too weak. 1 trivial. 10 not checked. [2022-11-18 19:52:01,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:01,615 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~ppnode#1.offset_38| Int) (|v_chain_node_~node~0#1.base_42| Int) (v_ArrVal_4710 (Array Int Int)) (|v_chain_node_~node~0#1.offset_37| Int) (v_ArrVal_4711 (Array Int Int)) (v_ArrVal_4712 (Array Int Int)) (v_ArrVal_4713 (Array Int Int))) (or (not (= (let ((.cse3 (store (store |c_#memory_$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 [2022-11-18 19:52:01,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077725525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:01,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:01,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 49 [2022-11-18 19:52:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491960093] [2022-11-18 19:52:01,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 19:52:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 19:52:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1940, Unknown=7, NotChecked=364, Total=2450 [2022-11-18 19:52:01,621 INFO L87 Difference]: Start difference. First operand 292 states and 359 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) [2022-11-18 19:52:02,056 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$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$.base| .cse2 v_DerPreprocessor_51) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_52) .cse2 v_DerPreprocessor_51) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_52) .cse2)))))) (exists ((v_ArrVal_4680 (Array Int Int)) (v_ArrVal_4671 (Array Int Int)) (v_ArrVal_4672 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_4677 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_4671 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4671) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4680) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_4672 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4672) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4677) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((v_ArrVal_4693 (Array Int Int)) (|chain_node_~ppnode#1.offset| Int) (v_ArrVal_4694 (Array Int Int)) (v_ArrVal_4695 (Array Int Int)) (v_ArrVal_4687 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$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$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4693) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4695)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) .cse1 (or (exists ((|chain_node_~node~0#1.base| Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (and (not (= |chain_node_~node~0#1.base| |c_chain_node_#in~ppnode#1.base|)) (exists ((v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| |chain_node_~node~0#1.base| v_DerPreprocessor_53) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_54) |chain_node_~node~0#1.base| v_DerPreprocessor_53) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_54) |chain_node_~node~0#1.base|) (select |c_#memory_$Pointer$.offset| |chain_node_~node~0#1.base|)) (= .cse3 (select v_DerPreprocessor_54 |c_chain_node_#in~ppnode#1.offset|)))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (select |c_#valid| |chain_node_~node~0#1.base|) 1) (exists ((v_ArrVal_4660 (Array Int Int)) (v_ArrVal_4663 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_4660 .cse3 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4660) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4663) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))))))) (and (= (select |c_#valid| |c_chain_node_#in~ppnode#1.base|) 1) (< |c_chain_node_#in~ppnode#1.base| |c_#StackHeapBarrier|) (exists ((v_arrayElimArr_58 (Array Int Int))) (and (= (select v_arrayElimArr_58 |c_chain_node_#in~ppnode#1.offset|) |c_chain_node_#in~ppnode#1.base|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_chain_node_#in~ppnode#1.base| v_arrayElimArr_58))))))))) is different from true [2022-11-18 19:52:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:05,702 INFO L93 Difference]: Finished difference Result 345 states and 435 transitions. [2022-11-18 19:52:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 19:52:05,707 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 [2022-11-18 19:52:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:05,711 INFO L225 Difference]: With dead ends: 345 [2022-11-18 19:52:05,711 INFO L226 Difference]: Without dead ends: 342 [2022-11-18 19:52:05,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=262, Invalid=3529, Unknown=11, NotChecked=620, Total=4422 [2022-11-18 19:52:05,712 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 119 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:05,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 1529 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1668 Invalid, 0 Unknown, 849 Unchecked, 2.3s Time] [2022-11-18 19:52:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-18 19:52:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 324. [2022-11-18 19:52:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 261 states have (on average 1.1992337164750957) internal successors, (313), 277 states have internal predecessors, (313), 47 states have call successors, (47), 16 states have call predecessors, (47), 15 states have return successors, (42), 30 states have call predecessors, (42), 39 states have call successors, (42) [2022-11-18 19:52:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 402 transitions. [2022-11-18 19:52:05,826 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 402 transitions. Word has length 59 [2022-11-18 19:52:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:05,827 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 402 transitions. [2022-11-18 19:52:05,827 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) [2022-11-18 19:52:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 402 transitions. [2022-11-18 19:52:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 19:52:05,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:05,830 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] [2022-11-18 19:52:05,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:06,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:52:06,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -186573861, now seen corresponding path program 1 times [2022-11-18 19:52:06,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:06,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254859769] [2022-11-18 19:52:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:06,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:52:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:09,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:52:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:52:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:52:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:17,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:52:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:52:17,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254859769] [2022-11-18 19:52:17,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254859769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070929112] [2022-11-18 19:52:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:17,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:17,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:17,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:52:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 275 conjunts are in the unsatisfiable core [2022-11-18 19:52:18,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:18,049 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-18 19:52:18,049 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 [2022-11-18 19:52:18,223 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 [2022-11-18 19:52:18,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:18,412 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 [2022-11-18 19:52:18,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:18,433 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 [2022-11-18 19:52:18,579 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-18 19:52:18,579 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 [2022-11-18 19:52:18,619 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-18 19:52:18,619 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 [2022-11-18 19:52:18,630 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 [2022-11-18 19:52:18,696 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-18 19:52:18,696 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 [2022-11-18 19:52:18,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:52:18,771 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 0 case distinctions, treesize of input 23 treesize of output 20 [2022-11-18 19:52:18,810 INFO L321 Elim1Store]: treesize reduction 61, result has 7.6 percent of original size [2022-11-18 19:52:18,810 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 [2022-11-18 19:52:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:52:18,842 INFO L321 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2022-11-18 19:52:18,843 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 [2022-11-18 19:52:18,973 INFO L321 Elim1Store]: treesize reduction 44, result has 26.7 percent of original size [2022-11-18 19:52:18,973 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 [2022-11-18 19:52:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:52:19,035 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 [2022-11-18 19:52:19,049 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:52:19,049 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 [2022-11-18 19:52:19,504 INFO L321 Elim1Store]: treesize reduction 78, result has 33.9 percent of original size [2022-11-18 19:52:19,504 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 [2022-11-18 19:52:20,114 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 [2022-11-18 19:52:20,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:52:20,127 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 [2022-11-18 19:52:20,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:52:20,410 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 [2022-11-18 19:52:20,424 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 [2022-11-18 19:52:20,433 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 [2022-11-18 19:52:20,818 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5132 (Array Int Int)) (v_ArrVal_5133 (Array Int Int)) (v_ArrVal_5126 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5130 (Array Int Int))) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= (store (store |c_old(#memory_$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 [2022-11-18 19:52:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,949 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-18 19:52:20,949 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 [2022-11-18 19:52:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:20,980 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 [2022-11-18 19:52:20,993 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 [2022-11-18 19:52:21,006 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 [2022-11-18 19:52:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:21,044 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-11-18 19:52:21,044 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 [2022-11-18 19:52:21,092 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 [2022-11-18 19:52:21,716 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 [2022-11-18 19:52:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:21,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:21,760 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-18 19:52:21,760 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 [2022-11-18 19:52:22,143 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 [2022-11-18 19:52:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:52:22,159 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 [2022-11-18 19:52:22,171 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 [2022-11-18 19:52:22,497 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5143 (Array Int Int)) (v_ArrVal_5145 (Array Int Int)) (v_ArrVal_5146 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5141 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$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 [2022-11-18 19:52:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,566 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 [2022-11-18 19:52:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,624 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-18 19:52:22,625 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 [2022-11-18 19:52:22,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:22,656 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-18 19:52:22,657 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 [2022-11-18 19:52:22,671 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 [2022-11-18 19:52:22,719 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 [2022-11-18 19:52:23,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:52:23,110 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 [2022-11-18 19:52:23,121 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 [2022-11-18 19:52:23,512 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5151 Int) (v_ArrVal_5159 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5148 Int)) (and (= |c_#memory_$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 [2022-11-18 19:52:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,603 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:52:23,604 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 [2022-11-18 19:52:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,641 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 19:52:23,641 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 [2022-11-18 19:52:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:23,677 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-18 19:52:23,677 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 [2022-11-18 19:52:23,693 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 [2022-11-18 19:52:27,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:52:27,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:52:27,776 INFO L321 Elim1Store]: treesize reduction 52, result has 13.3 percent of original size [2022-11-18 19:52:27,777 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 [2022-11-18 19:52:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:52:27,807 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-11-18 19:52:27,807 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 [2022-11-18 19:52:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 12 not checked. [2022-11-18 19:52:27,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:03,008 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:53:16,169 WARN L233 SmtUtils]: Spent 10.27s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:53:27,749 WARN L233 SmtUtils]: Spent 10.52s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:53:28,715 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_chain_node_~node~0#1.base_47| Int)) (or (not (< |v_chain_node_~node~0#1.base_47| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_5185 Int) (v_ArrVal_5186 Int) (v_ArrVal_5184 (Array Int Int))) (let ((.cse2 (let ((.cse6 (store |c_#memory_$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 [2022-11-18 19:53:28,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070929112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:28,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:53:28,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 52 [2022-11-18 19:53:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55415210] [2022-11-18 19:53:28,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 19:53:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:28,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 19:53:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2904, Unknown=15, NotChecked=452, Total=3660 [2022-11-18 19:53:28,740 INFO L87 Difference]: Start difference. First operand 324 states and 402 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) [2022-11-18 19:53:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:40,852 INFO L93 Difference]: Finished difference Result 432 states and 530 transitions. [2022-11-18 19:53:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 19:53:40,853 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 [2022-11-18 19:53:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:40,856 INFO L225 Difference]: With dead ends: 432 [2022-11-18 19:53:40,856 INFO L226 Difference]: Without dead ends: 429 [2022-11-18 19:53:40,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=405, Invalid=4018, Unknown=15, NotChecked=532, Total=4970 [2022-11-18 19:53:40,859 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 187 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 878 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:40,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 880 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1099 Invalid, 0 Unknown, 878 Unchecked, 2.1s Time] [2022-11-18 19:53:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-18 19:53:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 384. [2022-11-18 19:53:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 305 states have (on average 1.1901639344262296) internal successors, (363), 328 states have internal predecessors, (363), 60 states have call successors, (60), 19 states have call predecessors, (60), 18 states have return successors, (57), 36 states have call predecessors, (57), 52 states have call successors, (57) [2022-11-18 19:53:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 480 transitions. [2022-11-18 19:53:40,993 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 480 transitions. Word has length 62 [2022-11-18 19:53:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:40,993 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 480 transitions. [2022-11-18 19:53:40,993 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) [2022-11-18 19:53:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 480 transitions. [2022-11-18 19:53:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 19:53:40,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:40,995 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] [2022-11-18 19:53:41,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 19:53:41,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:41,196 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1802853032, now seen corresponding path program 1 times [2022-11-18 19:53:41,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147058658] [2022-11-18 19:53:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:53:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:41,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:53:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:53:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:53:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:53:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147058658] [2022-11-18 19:53:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147058658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724909624] [2022-11-18 19:53:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:41,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:41,489 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:41,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:53:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 19:53:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:42,160 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 [2022-11-18 19:53:42,163 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 [2022-11-18 19:53:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:53:42,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:53:42,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724909624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:42,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:53:42,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 12 [2022-11-18 19:53:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893589062] [2022-11-18 19:53:42,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:53:42,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:53:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:53:42,524 INFO L87 Difference]: Start difference. First operand 384 states and 480 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) [2022-11-18 19:53:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:43,250 INFO L93 Difference]: Finished difference Result 411 states and 514 transitions. [2022-11-18 19:53:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:53:43,250 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 [2022-11-18 19:53:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:43,253 INFO L225 Difference]: With dead ends: 411 [2022-11-18 19:53:43,253 INFO L226 Difference]: Without dead ends: 408 [2022-11-18 19:53:43,254 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 [2022-11-18 19:53:43,255 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:43,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 368 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 337 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-18 19:53:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-18 19:53:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 392. [2022-11-18 19:53:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 312 states have (on average 1.189102564102564) internal successors, (371), 335 states have internal predecessors, (371), 61 states have call successors, (61), 20 states have call predecessors, (61), 18 states have return successors, (58), 36 states have call predecessors, (58), 53 states have call successors, (58) [2022-11-18 19:53:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 490 transitions. [2022-11-18 19:53:43,365 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 490 transitions. Word has length 63 [2022-11-18 19:53:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:43,365 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 490 transitions. [2022-11-18 19:53:43,366 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) [2022-11-18 19:53:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 490 transitions. [2022-11-18 19:53:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 19:53:43,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:43,367 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] [2022-11-18 19:53:43,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:43,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:53:43,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:43,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1473312201, now seen corresponding path program 2 times [2022-11-18 19:53:43,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744316073] [2022-11-18 19:53:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:53:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:48,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:53:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-18 19:53:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:54,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:53:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:53:57,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744316073] [2022-11-18 19:53:57,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744316073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999707111] [2022-11-18 19:53:57,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:53:57,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:57,447 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:57,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:53:57,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:53:57,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:53:57,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 229 conjunts are in the unsatisfiable core [2022-11-18 19:53:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:58,014 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:53:58,014 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 [2022-11-18 19:53:58,244 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:53:58,244 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 [2022-11-18 19:53:58,281 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:53:58,282 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 [2022-11-18 19:53:58,290 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 [2022-11-18 19:53:58,299 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 [2022-11-18 19:53:58,308 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 [2022-11-18 19:53:58,317 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 [2022-11-18 19:53:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:53:58,385 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 [2022-11-18 19:53:58,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:53:58,426 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 [2022-11-18 19:53:58,429 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 [2022-11-18 19:53:58,476 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 [2022-11-18 19:53:58,796 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 [2022-11-18 19:53:58,813 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 [2022-11-18 19:53:59,009 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 [2022-11-18 19:53:59,014 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 [2022-11-18 19:53:59,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:53:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:59,768 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 [2022-11-18 19:53:59,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:59,781 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 [2022-11-18 19:53:59,791 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 [2022-11-18 19:53:59,799 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 [2022-11-18 19:53:59,811 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 [2022-11-18 19:53:59,823 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 [2022-11-18 19:54:00,194 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-18 19:54:00,194 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 [2022-11-18 19:54:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,208 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 [2022-11-18 19:54:00,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 19:54:00,738 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5893 (Array Int Int)) (v_ArrVal_5894 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5902 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$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 [2022-11-18 19:54:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,860 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-18 19:54:00,860 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 [2022-11-18 19:54:00,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:00,880 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 [2022-11-18 19:54:00,895 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 [2022-11-18 19:54:00,911 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 [2022-11-18 19:54:00,925 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 [2022-11-18 19:54:00,955 INFO L321 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2022-11-18 19:54:00,955 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 [2022-11-18 19:54:00,990 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 [2022-11-18 19:54:01,504 INFO L321 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2022-11-18 19:54:01,505 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 [2022-11-18 19:54:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,540 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-18 19:54:01,541 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 [2022-11-18 19:54:01,908 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-18 19:54:01,908 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 [2022-11-18 19:54:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:01,929 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 [2022-11-18 19:54:01,936 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 [2022-11-18 19:54:02,408 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5917 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_5912 (Array Int Int)) (v_ArrVal_5913 (Array Int Int)) (v_ArrVal_5916 (Array Int Int))) (and (= (store (store |c_old(#memory_$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 [2022-11-18 19:54:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,510 INFO L321 Elim1Store]: treesize reduction 70, result has 6.7 percent of original size [2022-11-18 19:54:02,510 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 [2022-11-18 19:54:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:02,575 INFO L321 Elim1Store]: treesize reduction 116, result has 8.7 percent of original size [2022-11-18 19:54:02,575 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 [2022-11-18 19:54:02,587 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 [2022-11-18 19:54:02,637 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-18 19:54:02,637 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 [2022-11-18 19:54:02,648 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 [2022-11-18 19:54:05,801 INFO L321 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2022-11-18 19:54:05,801 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 [2022-11-18 19:54:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:05,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:05,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:05,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:05,836 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:54:05,836 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 [2022-11-18 19:54:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2022-11-18 19:54:06,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999707111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:07,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:54:07,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 52 [2022-11-18 19:54:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200824928] [2022-11-18 19:54:07,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 19:54:07,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 19:54:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3019, Unknown=2, NotChecked=222, Total=3422 [2022-11-18 19:54:07,601 INFO L87 Difference]: Start difference. First operand 392 states and 490 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) [2022-11-18 19:54:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:54:14,797 INFO L93 Difference]: Finished difference Result 475 states and 594 transitions. [2022-11-18 19:54:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 19:54:14,798 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 [2022-11-18 19:54:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:54:14,801 INFO L225 Difference]: With dead ends: 475 [2022-11-18 19:54:14,801 INFO L226 Difference]: Without dead ends: 398 [2022-11-18 19:54:14,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=336, Invalid=4926, Unknown=2, NotChecked=286, Total=5550 [2022-11-18 19:54:14,803 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 87 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:54:14,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1357 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1720 Invalid, 0 Unknown, 696 Unchecked, 3.3s Time] [2022-11-18 19:54:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-18 19:54:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 392. [2022-11-18 19:54:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 312 states have (on average 1.185897435897436) internal successors, (370), 335 states have internal predecessors, (370), 61 states have call successors, (61), 20 states have call predecessors, (61), 18 states have return successors, (58), 36 states have call predecessors, (58), 53 states have call successors, (58) [2022-11-18 19:54:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 489 transitions. [2022-11-18 19:54:14,902 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 489 transitions. Word has length 63 [2022-11-18 19:54:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:54:14,903 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 489 transitions. [2022-11-18 19:54:14,903 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) [2022-11-18 19:54:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 489 transitions. [2022-11-18 19:54:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 19:54:14,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:54:14,905 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] [2022-11-18 19:54:14,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:15,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:54:15,114 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:54:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash 17440653, now seen corresponding path program 1 times [2022-11-18 19:54:15,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:15,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802117943] [2022-11-18 19:54:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:15,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:16,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:54:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:54:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:16,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:54:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:16,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:54:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:54:16,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:16,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802117943] [2022-11-18 19:54:16,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802117943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:16,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714731756] [2022-11-18 19:54:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:16,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:16,518 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:16,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:54:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:17,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 19:54:17,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:17,248 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:54:17,249 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 [2022-11-18 19:54:17,256 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 [2022-11-18 19:54:17,264 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 [2022-11-18 19:54:17,305 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-18 19:54:17,306 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 [2022-11-18 19:54:17,308 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 [2022-11-18 19:54:19,746 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-18 19:54:19,746 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 [2022-11-18 19:54:20,094 INFO L321 Elim1Store]: treesize reduction 273, result has 30.5 percent of original size [2022-11-18 19:54:20,095 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 [2022-11-18 19:54:20,161 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 [2022-11-18 19:54:20,206 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 [2022-11-18 19:54:21,191 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:21,191 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 [2022-11-18 19:54:21,234 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:21,235 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 [2022-11-18 19:54:21,258 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 [2022-11-18 19:54:21,283 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 [2022-11-18 19:54:21,586 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:21,587 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 [2022-11-18 19:54:21,733 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:21,734 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 [2022-11-18 19:54:21,751 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 [2022-11-18 19:54:21,788 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:21,789 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 [2022-11-18 19:54:21,823 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 [2022-11-18 19:54:23,011 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:54:23,012 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 [2022-11-18 19:54:23,026 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 [2022-11-18 19:54:23,082 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:23,083 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 [2022-11-18 19:54:23,176 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:23,176 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 [2022-11-18 19:54:23,234 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-18 19:54:23,234 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 [2022-11-18 19:54:23,252 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 [2022-11-18 19:54:23,297 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:23,297 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 [2022-11-18 19:54:23,311 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 [2022-11-18 19:54:23,330 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 [2022-11-18 19:54:23,434 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:54:23,434 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 [2022-11-18 19:54:23,469 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-18 19:54:23,469 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 [2022-11-18 19:54:23,529 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-18 19:54:23,529 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 [2022-11-18 19:54:23,650 INFO L321 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-11-18 19:54:23,650 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 [2022-11-18 19:54:23,838 INFO L321 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-11-18 19:54:23,839 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 [2022-11-18 19:54:23,976 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-18 19:54:23,976 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 [2022-11-18 19:54:24,040 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:24,040 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 [2022-11-18 19:54:24,123 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:24,123 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 24 treesize of output 24 [2022-11-18 19:54:24,161 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:24,161 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 [2022-11-18 19:54:24,307 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:54:24,307 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 [2022-11-18 19:54:24,322 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 [2022-11-18 19:54:24,377 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:24,377 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 [2022-11-18 19:54:24,486 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:24,487 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 [2022-11-18 19:54:24,551 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-18 19:54:24,551 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 25 treesize of output 32 [2022-11-18 19:54:24,571 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 [2022-11-18 19:54:24,619 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:24,620 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 [2022-11-18 19:54:24,635 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 [2022-11-18 19:54:24,655 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 14 treesize of output 13 [2022-11-18 19:54:24,782 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:54:24,782 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 [2022-11-18 19:54:24,811 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:24,812 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 [2022-11-18 19:54:24,863 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:24,864 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 [2022-11-18 19:54:24,956 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-18 19:54:24,957 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 [2022-11-18 19:54:25,049 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-18 19:54:25,049 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 [2022-11-18 19:54:25,205 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-18 19:54:25,205 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 [2022-11-18 19:54:25,251 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 19:54:25,251 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 [2022-11-18 19:54:25,286 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:25,287 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 [2022-11-18 19:54:25,346 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-11-18 19:54:25,347 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 [2022-11-18 19:57:16,651 WARN L233 SmtUtils]: Spent 2.59m on a formula simplification. DAG size of input: 366 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:57:16,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:16,849 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 [2022-11-18 19:57:16,858 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 [2022-11-18 19:57:17,092 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 [2022-11-18 19:57:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 2 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:57:17,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:21,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714731756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:21,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:57:21,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 38 [2022-11-18 19:57:21,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607739391] [2022-11-18 19:57:21,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 19:57:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 19:57:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1465, Unknown=69, NotChecked=0, Total=1640 [2022-11-18 19:57:21,884 INFO L87 Difference]: Start difference. First operand 392 states and 489 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) [2022-11-18 19:57:38,031 WARN L233 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 81 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:57:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:41,168 INFO L93 Difference]: Finished difference Result 480 states and 597 transitions. [2022-11-18 19:57:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 19:57:41,169 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 [2022-11-18 19:57:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:41,171 INFO L225 Difference]: With dead ends: 480 [2022-11-18 19:57:41,171 INFO L226 Difference]: Without dead ends: 477 [2022-11-18 19:57:41,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 195.6s TimeCoverageRelationStatistics Valid=250, Invalid=3438, Unknown=94, NotChecked=0, Total=3782 [2022-11-18 19:57:41,172 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 140 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:41,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1186 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1079 Invalid, 0 Unknown, 475 Unchecked, 1.3s Time] [2022-11-18 19:57:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-18 19:57:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 405. [2022-11-18 19:57:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 323 states have (on average 1.1888544891640866) internal successors, (384), 346 states have internal predecessors, (384), 59 states have call successors, (59), 20 states have call predecessors, (59), 22 states have return successors, (62), 38 states have call predecessors, (62), 51 states have call successors, (62) [2022-11-18 19:57:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 505 transitions. [2022-11-18 19:57:41,335 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 505 transitions. Word has length 65 [2022-11-18 19:57:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:41,335 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 505 transitions. [2022-11-18 19:57:41,336 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) [2022-11-18 19:57:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 505 transitions. [2022-11-18 19:57:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 19:57:41,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:41,337 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] [2022-11-18 19:57:41,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:41,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:57:41,538 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1662798770, now seen corresponding path program 1 times [2022-11-18 19:57:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:41,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191048488] [2022-11-18 19:57:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:41,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:57:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:57:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:57:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:41,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:57:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:57:41,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191048488] [2022-11-18 19:57:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191048488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:41,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494967294] [2022-11-18 19:57:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:41,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:41,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:41,815 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:41,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 19:57:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:42,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 19:57:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:42,558 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 [2022-11-18 19:57:42,561 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 [2022-11-18 19:57:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:57:42,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:57:42,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494967294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:42,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:42,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 12 [2022-11-18 19:57:42,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976935288] [2022-11-18 19:57:42,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:42,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:57:42,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:42,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:57:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:57:42,981 INFO L87 Difference]: Start difference. First operand 405 states and 505 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) [2022-11-18 19:57:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:43,787 INFO L93 Difference]: Finished difference Result 434 states and 541 transitions. [2022-11-18 19:57:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:57:43,787 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 [2022-11-18 19:57:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:43,789 INFO L225 Difference]: With dead ends: 434 [2022-11-18 19:57:43,789 INFO L226 Difference]: Without dead ends: 431 [2022-11-18 19:57:43,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:57:43,790 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 115 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 376 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 351 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2022-11-18 19:57:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-18 19:57:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 415. [2022-11-18 19:57:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 332 states have (on average 1.1867469879518073) internal successors, (394), 355 states have internal predecessors, (394), 60 states have call successors, (60), 21 states have call predecessors, (60), 22 states have return successors, (63), 38 states have call predecessors, (63), 52 states have call successors, (63) [2022-11-18 19:57:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 517 transitions. [2022-11-18 19:57:44,002 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 517 transitions. Word has length 65 [2022-11-18 19:57:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:44,003 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 517 transitions. [2022-11-18 19:57:44,003 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) [2022-11-18 19:57:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 517 transitions. [2022-11-18 19:57:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 19:57:44,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:44,006 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] [2022-11-18 19:57:44,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:44,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:57:44,222 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1114148957, now seen corresponding path program 2 times [2022-11-18 19:57:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852691266] [2022-11-18 19:57:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:45,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:57:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:45,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:57:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:57:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:46,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 19:57:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:46,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 19:57:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:46,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 19:57:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:57:47,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852691266] [2022-11-18 19:57:47,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852691266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761675501] [2022-11-18 19:57:47,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:47,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:47,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:47,217 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:47,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 19:57:47,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 19:57:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:48,016 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 [2022-11-18 19:57:48,226 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:57:48,226 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 [2022-11-18 19:57:48,235 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 [2022-11-18 19:57:48,243 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 [2022-11-18 19:57:48,308 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-18 19:57:48,308 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 [2022-11-18 19:57:48,311 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 [2022-11-18 19:57:48,505 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 [2022-11-18 19:57:48,589 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 [2022-11-18 19:57:48,778 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7112 (Array Int Int)) (|chain_node_~ppnode#1.offset| Int) (v_ArrVal_7107 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (|chain_node_~node~0#1.offset| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= |c_#memory_$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 [2022-11-18 19:57:48,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:49,241 INFO L321 Elim1Store]: treesize reduction 152, result has 42.6 percent of original size [2022-11-18 19:57:49,241 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 [2022-11-18 19:57:49,335 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 [2022-11-18 19:57:49,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:49,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:49,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:49,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:49,965 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 [2022-11-18 19:57:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:50,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:50,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:50,119 INFO L321 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2022-11-18 19:57:50,119 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 [2022-11-18 19:57:50,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:50,380 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 [2022-11-18 19:57:52,760 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-18 19:57:52,761 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 [2022-11-18 19:57:52,848 INFO L321 Elim1Store]: treesize reduction 39, result has 42.6 percent of original size [2022-11-18 19:57:52,848 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 [2022-11-18 19:57:52,885 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-18 19:57:52,954 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-18 19:57:52,954 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 [2022-11-18 19:57:53,180 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-18 19:57:53,181 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 [2022-11-18 19:57:53,371 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-18 19:57:53,371 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 [2022-11-18 19:57:53,430 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-18 19:57:53,443 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-18 19:57:54,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:54,254 INFO L321 Elim1Store]: treesize reduction 28, result has 36.4 percent of original size [2022-11-18 19:57:54,255 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 [2022-11-18 19:57:54,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:54,290 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 [2022-11-18 19:57:54,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:54,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:54,855 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 [2022-11-18 19:57:55,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:55,044 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 [2022-11-18 19:57:55,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:55,128 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 [2022-11-18 19:57:55,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:55,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:55,387 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-18 19:57:55,388 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 [2022-11-18 19:57:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:55,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:55,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:55,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:55,639 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 [2022-11-18 19:57:55,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:55,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:55,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:55,752 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 [2022-11-18 19:57:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:55,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:57:55,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-18 19:57:56,979 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 [2022-11-18 19:57:57,096 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7114 (Array Int Int)) (v_ArrVal_7115 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$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 [2022-11-18 19:57:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:57,137 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:57:57,137 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 [2022-11-18 19:57:57,176 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 [2022-11-18 19:57:57,307 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7107 (Array Int Int)) (v_ArrVal_7118 (Array Int Int)) (v_ArrVal_7117 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= |c_#memory_$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 [2022-11-18 19:57:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:57,377 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 19:57:57,377 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 [2022-11-18 19:57:57,430 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 [2022-11-18 19:57:57,571 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7107 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (v_ArrVal_7121 (Array Int Int)) (v_ArrVal_7120 (Array Int Int))) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= |c_#memory_$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 [2022-11-18 19:57:57,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:57,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:57,643 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 19:57:57,643 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 [2022-11-18 19:57:57,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 19:57:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 31 trivial. 20 not checked. [2022-11-18 19:57:57,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761675501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:58,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:57:58,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2022-11-18 19:57:58,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374984925] [2022-11-18 19:57:58,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:58,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 19:57:58,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:58,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 19:57:58,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=775, Unknown=7, NotChecked=236, Total=1122 [2022-11-18 19:57:58,045 INFO L87 Difference]: Start difference. First operand 415 states and 517 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) [2022-11-18 19:58:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:58:00,638 INFO L93 Difference]: Finished difference Result 444 states and 550 transitions. [2022-11-18 19:58:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 19:58:00,638 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 [2022-11-18 19:58:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:58:00,641 INFO L225 Difference]: With dead ends: 444 [2022-11-18 19:58:00,642 INFO L226 Difference]: Without dead ends: 441 [2022-11-18 19:58:00,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=177, Invalid=1310, Unknown=11, NotChecked=308, Total=1806 [2022-11-18 19:58:00,643 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 181 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:58:00,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 592 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1216 Invalid, 0 Unknown, 519 Unchecked, 1.6s Time] [2022-11-18 19:58:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-18 19:58:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 415. [2022-11-18 19:58:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 332 states have (on average 1.180722891566265) internal successors, (392), 355 states have internal predecessors, (392), 60 states have call successors, (60), 21 states have call predecessors, (60), 22 states have return successors, (63), 38 states have call predecessors, (63), 52 states have call successors, (63) [2022-11-18 19:58:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 515 transitions. [2022-11-18 19:58:00,821 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 515 transitions. Word has length 67 [2022-11-18 19:58:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:58:00,822 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 515 transitions. [2022-11-18 19:58:00,822 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) [2022-11-18 19:58:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 515 transitions. [2022-11-18 19:58:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 19:58:00,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:58:00,825 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] [2022-11-18 19:58:00,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:58:01,033 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:58:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2071904462, now seen corresponding path program 2 times [2022-11-18 19:58:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:01,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510483875] [2022-11-18 19:58:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:58:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:02,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:58:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:02,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:58:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:02,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:58:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:58:02,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510483875] [2022-11-18 19:58:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510483875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:58:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224919] [2022-11-18 19:58:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:58:02,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:58:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:02,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:58:02,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_250f3d83-01cf-411d-972c-3004b46e1dd1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 19:58:03,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:58:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:58:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-18 19:58:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:58:03,497 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 19:58:03,497 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 [2022-11-18 19:58:03,552 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2022-11-18 19:58:03,553 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 [2022-11-18 19:58:03,608 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-18 19:58:03,608 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 [2022-11-18 19:58:03,624 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 [2022-11-18 19:58:03,639 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 [2022-11-18 19:58:03,655 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 8 treesize of output 7 [2022-11-18 19:58:03,697 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 [2022-11-18 19:58:03,727 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 [2022-11-18 19:58:03,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:58:03,777 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 [2022-11-18 19:58:03,783 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 5 treesize of output 3 [2022-11-18 19:58:03,827 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 [2022-11-18 19:58:03,849 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 [2022-11-18 19:58:03,859 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 27 treesize of output 19 [2022-11-18 19:58:05,406 INFO L321 Elim1Store]: treesize reduction 94, result has 40.5 percent of original size [2022-11-18 19:58:05,406 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 [2022-11-18 19:58:05,508 INFO L321 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2022-11-18 19:58:05,508 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 [2022-11-18 19:58:06,141 INFO L321 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2022-11-18 19:58:06,141 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 [2022-11-18 19:58:06,416 INFO L321 Elim1Store]: treesize reduction 126, result has 51.0 percent of original size [2022-11-18 19:58:06,416 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