./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:34:11,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:34:11,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:34:11,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:34:11,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:34:11,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:34:11,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:34:11,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:34:11,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:34:11,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:34:11,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:34:11,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:34:11,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:34:11,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:34:11,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:34:11,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:34:11,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:34:11,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:34:11,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:34:11,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:34:11,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:34:11,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:34:11,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:34:11,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:34:11,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:34:11,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:34:11,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:34:11,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:34:11,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:34:11,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:34:11,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:34:11,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:34:11,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:34:11,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:34:11,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:34:11,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:34:11,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:34:11,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:34:11,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:34:11,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:34:11,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:34:11,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:34:11,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:34:11,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:34:11,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:34:11,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:34:11,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:34:11,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:34:11,738 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:34:11,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:34:11,739 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:34:11,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:34:11,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:34:11,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:34:11,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:34:11,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:34:11,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:34:11,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:34:11,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:34:11,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:34:11,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:34:11,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:34:11,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:34:11,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:34:11,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:34:11,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:34:11,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:34:11,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:34:11,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:34:11,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:34:11,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:34:11,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:34:11,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:34:11,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:34:11,744 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_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-11-23 12:34:12,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:34:12,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:34:12,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:34:12,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:34:12,130 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:34:12,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-11-23 12:34:12,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/data/6b302838a/1f5b1c6edd814c628bdd42afe70ef905/FLAG487f9397f [2021-11-23 12:34:12,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:34:12,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-11-23 12:34:12,978 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/data/6b302838a/1f5b1c6edd814c628bdd42afe70ef905/FLAG487f9397f [2021-11-23 12:34:13,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/data/6b302838a/1f5b1c6edd814c628bdd42afe70ef905 [2021-11-23 12:34:13,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:34:13,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:34:13,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:34:13,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:34:13,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:34:13,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6696f20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13, skipping insertion in model container [2021-11-23 12:34:13,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:34:13,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:34:13,598 WARN L230 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_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-11-23 12:34:13,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:34:13,610 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:34:13,659 WARN L230 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_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-11-23 12:34:13,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:34:13,698 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:34:13,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13 WrapperNode [2021-11-23 12:34:13,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:34:13,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:34:13,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:34:13,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:34:13,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,755 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 132 [2021-11-23 12:34:13,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:34:13,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:34:13,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:34:13,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:34:13,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:34:13,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:34:13,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:34:13,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:34:13,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (1/1) ... [2021-11-23 12:34:13,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:34:13,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:13,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:34:13,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:34:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:34:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:34:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:34:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:34:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:34:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:34:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:34:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:34:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 12:34:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:34:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:34:13,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:34:14,111 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:34:14,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:34:14,382 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:34:14,390 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:34:14,391 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 12:34:14,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:34:14 BoogieIcfgContainer [2021-11-23 12:34:14,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:34:14,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:34:14,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:34:14,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:34:14,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:34:13" (1/3) ... [2021-11-23 12:34:14,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c01a95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:34:14, skipping insertion in model container [2021-11-23 12:34:14,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:13" (2/3) ... [2021-11-23 12:34:14,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c01a95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:34:14, skipping insertion in model container [2021-11-23 12:34:14,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:34:14" (3/3) ... [2021-11-23 12:34:14,404 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-11-23 12:34:14,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:34:14,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:34:14,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:34:14,479 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:34:14,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:34:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 12:34:14,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:14,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:14,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1194520832, now seen corresponding path program 1 times [2021-11-23 12:34:14,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:14,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736575306] [2021-11-23 12:34:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:14,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:14,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736575306] [2021-11-23 12:34:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736575306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:14,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:34:14,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:34:14,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213490568] [2021-11-23 12:34:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:14,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:34:14,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:34:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:34:14,743 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:14,764 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2021-11-23 12:34:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:34:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 12:34:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:14,777 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:34:14,777 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 12:34:14,799 INFO L932 BasicCegarLoop]: 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 [2021-11-23 12:34:14,804 INFO L933 BasicCegarLoop]: 35 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, 35 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 [2021-11-23 12:34:14,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 12:34:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 12:34:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 12:34:14,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-11-23 12:34:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:14,855 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 12:34:14,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 12:34:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 12:34:14,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:14,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:14,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:34:14,860 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:14,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1956013076, now seen corresponding path program 1 times [2021-11-23 12:34:14,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:14,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955463017] [2021-11-23 12:34:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:14,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:15,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:15,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955463017] [2021-11-23 12:34:15,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955463017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:15,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:34:15,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:34:15,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002311232] [2021-11-23 12:34:15,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:34:15,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:34:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:34:15,032 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:15,056 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-11-23 12:34:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:34:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 12:34:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:15,061 INFO L225 Difference]: With dead ends: 40 [2021-11-23 12:34:15,061 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 12:34:15,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:34:15,070 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:15,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 12:34:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-11-23 12:34:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-23 12:34:15,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-11-23 12:34:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:15,092 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-23 12:34:15,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-23 12:34:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:34:15,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:15,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:15,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:34:15,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1865428092, now seen corresponding path program 1 times [2021-11-23 12:34:15,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:15,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366156892] [2021-11-23 12:34:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:15,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:15,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366156892] [2021-11-23 12:34:15,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366156892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213691698] [2021-11-23 12:34:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:15,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:15,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:15,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:34:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:15,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:34:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:15,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:15,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213691698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:15,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:15,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-23 12:34:15,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092408996] [2021-11-23 12:34:15,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:15,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:34:15,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:15,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:34:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:34:15,482 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:15,505 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-11-23 12:34:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:34:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:34:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:15,507 INFO L225 Difference]: With dead ends: 41 [2021-11-23 12:34:15,507 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 12:34:15,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:34:15,509 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:15,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 12:34:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 12:34:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 12:34:15,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2021-11-23 12:34:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:15,518 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 12:34:15,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 12:34:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:34:15,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:15,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:15,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:15,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 12:34:15,745 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -652961044, now seen corresponding path program 2 times [2021-11-23 12:34:15,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:15,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771341798] [2021-11-23 12:34:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:15,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:34:15,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771341798] [2021-11-23 12:34:15,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771341798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:15,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:34:15,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:34:15,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368324351] [2021-11-23 12:34:15,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:15,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:34:15,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:34:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:34:15,917 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:15,955 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-11-23 12:34:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:34:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 12:34:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:15,961 INFO L225 Difference]: With dead ends: 43 [2021-11-23 12:34:15,961 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 12:34:15,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:34:15,968 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:15,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 12:34:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-11-23 12:34:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-23 12:34:15,983 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 25 [2021-11-23 12:34:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:15,985 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-23 12:34:15,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-23 12:34:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:34:15,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:15,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:34:15,988 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -595702742, now seen corresponding path program 1 times [2021-11-23 12:34:15,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:15,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642281120] [2021-11-23 12:34:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:15,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:34:16,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642281120] [2021-11-23 12:34:16,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642281120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:16,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:34:16,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:34:16,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995473682] [2021-11-23 12:34:16,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:16,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:34:16,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:34:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:34:16,216 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:16,245 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-11-23 12:34:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:34:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 12:34:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:16,247 INFO L225 Difference]: With dead ends: 36 [2021-11-23 12:34:16,247 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:34:16,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:34:16,249 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:16,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:34:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 12:34:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 12:34:16,257 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-23 12:34:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:16,257 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 12:34:16,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 12:34:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 12:34:16,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:16,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:16,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:34:16,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1797017527, now seen corresponding path program 1 times [2021-11-23 12:34:16,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:16,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86482583] [2021-11-23 12:34:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:16,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:34:16,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:16,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86482583] [2021-11-23 12:34:16,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86482583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898011826] [2021-11-23 12:34:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:16,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:16,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:16,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:16,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:34:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 12:34:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:17,030 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 12:34:17,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 21 [2021-11-23 12:34:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:17,255 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-23 12:34:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 51 [2021-11-23 12:34:17,589 INFO L354 Elim1Store]: treesize reduction 108, result has 31.6 percent of original size [2021-11-23 12:34:17,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 80 treesize of output 82 [2021-11-23 12:34:17,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:34:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:34:17,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:34:17,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898011826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:17,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:34:17,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 22 [2021-11-23 12:34:17,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649936794] [2021-11-23 12:34:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:17,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 12:34:17,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 12:34:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-23 12:34:18,000 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:18,250 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-23 12:34:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 12:34:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 12:34:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:18,252 INFO L225 Difference]: With dead ends: 42 [2021-11-23 12:34:18,252 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 12:34:18,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:34:18,256 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:18,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-11-23 12:34:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 12:34:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-11-23 12:34:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 12:34:18,281 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2021-11-23 12:34:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:18,281 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 12:34:18,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 12:34:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 12:34:18,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:18,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:18,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:18,509 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1797019201, now seen corresponding path program 1 times [2021-11-23 12:34:18,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:18,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917060101] [2021-11-23 12:34:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:18,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:34:19,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:19,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917060101] [2021-11-23 12:34:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917060101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258185080] [2021-11-23 12:34:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:19,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:19,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:19,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:34:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:19,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-23 12:34:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:19,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:34:19,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:34:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:19,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 12:34:19,802 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 12:34:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:34:20,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:20,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 57 [2021-11-23 12:34:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 50 [2021-11-23 12:34:20,048 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-23 12:34:20,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 46 [2021-11-23 12:34:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:20,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 18 [2021-11-23 12:34:20,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:20,631 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-23 12:34:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 130 treesize of output 99 [2021-11-23 12:34:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:34:20,681 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-23 12:34:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 122 treesize of output 116 [2021-11-23 12:34:20,710 INFO L354 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2021-11-23 12:34:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 82 [2021-11-23 12:34:20,917 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-11-23 12:34:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 106 [2021-11-23 12:34:20,949 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-23 12:34:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 170 treesize of output 148 [2021-11-23 12:34:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 122 treesize of output 80 [2021-11-23 12:34:21,105 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 12:34:21,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 54 [2021-11-23 12:34:21,116 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 12:34:21,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 25 [2021-11-23 12:34:21,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:34:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:34:21,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:35:11,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_insert_~last~0#1.base_11| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.offset_10| Int) (v_DerPreprocessor_2 Int) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_8| Int) (v_DerPreprocessor_1 Int)) (or (< |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_8| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (= (let ((.cse1 (+ 4 |c_ULTIMATE.start_node_create_#res#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse3 (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_8| 4))) (select (select (let ((.cse0 (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) .cse3 v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_node_create_#res#1.base| (store (select .cse0 |c_ULTIMATE.start_node_create_#res#1.base|) .cse1 v_DerPreprocessor_1))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 |c_ULTIMATE.start_node_create_#res#1.base|)))) (store .cse4 |c_ULTIMATE.start_node_create_#res#1.base| (store (select .cse4 |c_ULTIMATE.start_node_create_#res#1.base|) .cse1 |v_ULTIMATE.start_sll_insert_~last~0#1.base_11|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 |c_ULTIMATE.start_node_create_#res#1.offset|)))) (store .cse5 |c_ULTIMATE.start_node_create_#res#1.base| (store (select .cse5 |c_ULTIMATE.start_node_create_#res#1.base|) .cse1 |v_ULTIMATE.start_sll_insert_~last~0#1.offset_10|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|))) is different from false [2021-11-23 12:35:13,222 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_node_create_~data#1| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.base_11| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.offset_10| Int) (v_DerPreprocessor_5 Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_8| Int) (v_DerPreprocessor_1 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_node_create_~temp~0#1.offset| 4))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 0) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_5)))) (or (< |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_8| (select (select .cse0 |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 0) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_4)))) (let ((.cse4 (select (select .cse7 |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse5 (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_8| 4))) (select (select (let ((.cse1 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 v_DerPreprocessor_3) |c_ULTIMATE.start_node_create_~temp~0#1.offset| |ULTIMATE.start_node_create_~data#1|)))) (store .cse3 .cse4 (store (select .cse3 .cse4) .cse5 v_DerPreprocessor_2))))) (store .cse1 |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (select .cse1 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 v_DerPreprocessor_1))) (select (select (let ((.cse6 (store .cse7 .cse4 (store (select .cse7 .cse4) .cse5 |c_ULTIMATE.start_node_create_~temp~0#1.base|)))) (store .cse6 |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (select .cse6 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 |v_ULTIMATE.start_sll_insert_~last~0#1.base_11|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (let ((.cse8 (store .cse0 .cse4 (store (select .cse0 .cse4) .cse5 |c_ULTIMATE.start_node_create_~temp~0#1.offset|)))) (store .cse8 |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (select .cse8 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 |v_ULTIMATE.start_sll_insert_~last~0#1.offset_10|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))) is different from false [2021-11-23 12:35:13,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 53825 treesize of output 52653 [2021-11-23 12:35:13,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6826628 treesize of output 6807416 [2021-11-23 12:35:22,844 WARN L227 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 1965 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 12:35:30,931 WARN L227 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 1962 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 12:35:31,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 12:35:31,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:35:31,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-23 12:35:31,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531601719] [2021-11-23 12:35:31,027 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 12:35:31,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 12:35:31,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 12:35:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=817, Unknown=23, NotChecked=118, Total=1056 [2021-11-23 12:35:31,030 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:43,355 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-23 12:35:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 12:35:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 12:35:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:43,356 INFO L225 Difference]: With dead ends: 46 [2021-11-23 12:35:43,356 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 12:35:43,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=265, Invalid=1607, Unknown=28, NotChecked=170, Total=2070 [2021-11-23 12:35:43,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:43,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 74 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:35:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 12:35:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-11-23 12:35:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-23 12:35:43,370 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 26 [2021-11-23 12:35:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:43,371 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-23 12:35:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-23 12:35:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 12:35:43,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:43,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:43,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:43,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:43,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1854275829, now seen corresponding path program 1 times [2021-11-23 12:35:43,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:43,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494042215] [2021-11-23 12:35:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:43,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:35:43,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494042215] [2021-11-23 12:35:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494042215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283787844] [2021-11-23 12:35:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:43,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:43,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:43,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:35:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 12:35:43,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:44,199 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-23 12:35:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 34 treesize of output 26 [2021-11-23 12:35:44,267 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 12:35:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 16 [2021-11-23 12:35:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:35:44,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:35:45,390 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_node_create_~temp~0#1.offset| Int) (v_DerPreprocessor_6 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4) 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_6)) |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 0))) is different from false [2021-11-23 12:35:45,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 174 [2021-11-23 12:35:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:35:45,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283787844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:35:45,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:35:45,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2021-11-23 12:35:45,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888151045] [2021-11-23 12:35:45,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:35:45,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 12:35:45,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 12:35:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=556, Unknown=1, NotChecked=48, Total=702 [2021-11-23 12:35:45,661 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:46,066 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-23 12:35:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:35:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 12:35:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:46,068 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:35:46,068 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 12:35:46,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=186, Invalid=873, Unknown=1, NotChecked=62, Total=1122 [2021-11-23 12:35:46,070 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:46,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 238 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2021-11-23 12:35:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 12:35:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-11-23 12:35:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-23 12:35:46,081 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2021-11-23 12:35:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:46,082 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-23 12:35:46,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-23 12:35:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:35:46,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:46,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:46,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:46,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:46,305 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash 436943574, now seen corresponding path program 2 times [2021-11-23 12:35:46,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:46,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662528169] [2021-11-23 12:35:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:46,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:35:46,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:46,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662528169] [2021-11-23 12:35:46,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662528169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:46,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:46,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:35:46,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721911246] [2021-11-23 12:35:46,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:46,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:35:46,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:35:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:46,356 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:46,385 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-23 12:35:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:35:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 12:35:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:46,387 INFO L225 Difference]: With dead ends: 42 [2021-11-23 12:35:46,387 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:35:46,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:35:46,390 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:46,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 42 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:35:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 12:35:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-23 12:35:46,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-23 12:35:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:46,401 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-23 12:35:46,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-23 12:35:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 12:35:46,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:46,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:35:46,403 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash 358632466, now seen corresponding path program 1 times [2021-11-23 12:35:46,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:46,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392365339] [2021-11-23 12:35:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:46,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:35:46,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:46,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392365339] [2021-11-23 12:35:46,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392365339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:46,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800311599] [2021-11-23 12:35:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:46,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:46,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:46,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d33bdc-7b84-45b6-b5db-dd8c2d4ec7c1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:35:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 12:35:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:47,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 12:35:47,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 14 [2021-11-23 12:35:47,542 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 12:35:47,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 12:35:47,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:35:47,694 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 12:35:47,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 56 treesize of output 42 [2021-11-23 12:35:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:35:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 18 [2021-11-23 12:35:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:35:48,115 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-23 12:35:48,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 86 treesize of output 88 [2021-11-23 12:35:48,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:35:48,221 INFO L354 Elim1Store]: treesize reduction 82, result has 51.2 percent of original size [2021-11-23 12:35:48,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 82 treesize of output 140 [2021-11-23 12:35:51,307 INFO L354 Elim1Store]: treesize reduction 271, result has 23.0 percent of original size [2021-11-23 12:35:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 281 treesize of output 255 [2021-11-23 12:35:51,373 INFO L354 Elim1Store]: treesize reduction 107, result has 20.1 percent of original size [2021-11-23 12:35:51,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 347 treesize of output 304 [2021-11-23 12:35:56,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:35:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 314 treesize of output 314 [2021-11-23 12:36:02,945 INFO L354 Elim1Store]: treesize reduction 20, result has 88.0 percent of original size [2021-11-23 12:36:02,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 295 treesize of output 294 [2021-11-23 12:36:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:36:10,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:36:12,403 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_insert_~last~0#1.offset_18| Int) (|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~last~0#1.base| Int)) (not (= (let ((.cse2 (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) (.cse4 (+ |ULTIMATE.start_sll_insert_~last~0#1.offset| 4))) (select (let ((.cse0 (let ((.cse3 (select |c_#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~last~0#1.base|))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~last~0#1.base| (store .cse3 .cse4 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) .cse2 (select .cse3 .cse4))))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~last~0#1.base|) .cse4 |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)))) (store .cse5 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) .cse2 |v_ULTIMATE.start_sll_insert_~last~0#1.offset_18|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) 0))) is different from false [2021-11-23 12:36:14,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_insert_~last~0#1.offset_18| Int) (|ULTIMATE.start_sll_insert_~last~0#1.base| Int) (|ULTIMATE.start_sll_insert_~last~0#1.offset| Int)) (not (= (let ((.cse2 (+ 4 |c_ULTIMATE.start_node_create_#res#1.offset|)) (.cse4 (+ |ULTIMATE.start_sll_insert_~last~0#1.offset| 4))) (select (let ((.cse0 (let ((.cse3 (select |c_#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~last~0#1.base|))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~last~0#1.base| (store .cse3 .cse4 |c_ULTIMATE.start_node_create_#res#1.base|)))) (store .cse1 |c_ULTIMATE.start_node_create_#res#1.base| (store (select .cse1 |c_ULTIMATE.start_node_create_#res#1.base|) .cse2 (select .cse3 .cse4))))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~last~0#1.base|) .cse4 |c_ULTIMATE.start_node_create_#res#1.offset|)))) (store .cse5 |c_ULTIMATE.start_node_create_#res#1.base| (store (select .cse5 |c_ULTIMATE.start_node_create_#res#1.base|) .cse2 |v_ULTIMATE.start_sll_insert_~last~0#1.offset_18|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) 0))) is different from false [2021-11-23 12:36:16,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_insert_~last~0#1.offset_18| Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_7 Int) (|ULTIMATE.start_sll_insert_~last~0#1.base| Int) (|ULTIMATE.start_sll_insert_~last~0#1.offset| Int)) (not (= (let ((.cse4 (+ |ULTIMATE.start_sll_insert_~last~0#1.offset| 4)) (.cse2 (+ |c_ULTIMATE.start_node_create_~temp~0#1.offset| 4))) (select (let ((.cse0 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 0) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_8)))) (let ((.cse3 (select .cse5 |ULTIMATE.start_sll_insert_~last~0#1.base|))) (let ((.cse1 (store .cse5 |ULTIMATE.start_sll_insert_~last~0#1.base| (store .cse3 .cse4 |c_ULTIMATE.start_node_create_~temp~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (select .cse1 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 (select .cse3 .cse4)))))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ (select (select (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 0) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_7)))) (store .cse7 |ULTIMATE.start_sll_insert_~last~0#1.base| (store (select .cse7 |ULTIMATE.start_sll_insert_~last~0#1.base|) .cse4 |c_ULTIMATE.start_node_create_~temp~0#1.offset|))))) (store .cse6 |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (select .cse6 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse2 |v_ULTIMATE.start_sll_insert_~last~0#1.offset_18|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) 0))) is different from false [2021-11-23 12:36:16,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13555 treesize of output 13535 [2021-11-23 12:38:13,040 WARN L227 SmtUtils]: Spent 48.32s on a formula simplification. DAG size of input: 1823 DAG size of output: 1009 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 12:38:13,046 INFO L354 Elim1Store]: treesize reduction 4362, result has 37.0 percent of original size [2021-11-23 12:38:13,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 33 select indices, 33 select index equivalence classes, 0 disjoint index pairs (out of 528 index pairs), introduced 37 new quantified variables, introduced 528 case distinctions, treesize of input 3790734074 treesize of output 3673088786