./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:54:08,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:54:08,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:54:08,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:54:08,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:54:08,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:54:08,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:54:08,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:54:08,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:54:08,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:54:08,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:54:08,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:54:08,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:54:08,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:54:08,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:54:08,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:54:08,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:54:08,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:54:08,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:54:08,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:54:08,339 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:54:08,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:54:08,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:54:08,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:54:08,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:54:08,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:54:08,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:54:08,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:54:08,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:54:08,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:54:08,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:54:08,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:54:08,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:54:08,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:54:08,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:54:08,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:54:08,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:54:08,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:54:08,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:54:08,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:54:08,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:54:08,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:54:08,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:54:08,398 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:54:08,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:54:08,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:54:08,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:54:08,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:54:08,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:54:08,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:54:08,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:54:08,402 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:54:08,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:54:08,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:54:08,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:54:08,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:54:08,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:54:08,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:54:08,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:54:08,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:54:08,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:54:08,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:54:08,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:54:08,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:54:08,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:54:08,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:54:08,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:54:08,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:54:08,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:54:08,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:54:08,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:54:08,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:54:08,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:54:08,408 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:54:08,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:54:08,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:54:08,409 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2022-07-13 10:54:08,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:54:08,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:54:08,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:54:08,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:54:08,683 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:54:08,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-07-13 10:54:08,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48cf25de/f36e5d0774254adfabd6cd388c62d14a/FLAG2ec1c6971 [2022-07-13 10:54:09,169 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:54:09,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-07-13 10:54:09,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48cf25de/f36e5d0774254adfabd6cd388c62d14a/FLAG2ec1c6971 [2022-07-13 10:54:09,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48cf25de/f36e5d0774254adfabd6cd388c62d14a [2022-07-13 10:54:09,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:54:09,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:54:09,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:54:09,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:54:09,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:54:09,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e696f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09, skipping insertion in model container [2022-07-13 10:54:09,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:54:09,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:54:09,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-07-13 10:54:09,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:54:09,790 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:54:09,798 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-07-13 10:54:09,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:54:09,812 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:54:09,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09 WrapperNode [2022-07-13 10:54:09,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:54:09,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:54:09,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:54:09,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:54:09,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,845 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-07-13 10:54:09,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:54:09,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:54:09,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:54:09,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:54:09,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:54:09,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:54:09,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:54:09,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:54:09,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (1/1) ... [2022-07-13 10:54:09,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:54:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:09,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 10:54:09,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 10:54:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:54:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:54:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:54:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:54:09,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:54:09,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:54:09,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:54:09,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:54:09,996 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:54:09,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:54:10,104 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:54:10,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:54:10,111 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:54:10,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:54:10 BoogieIcfgContainer [2022-07-13 10:54:10,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:54:10,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:54:10,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:54:10,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:54:10,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:54:09" (1/3) ... [2022-07-13 10:54:10,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6f9e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:54:10, skipping insertion in model container [2022-07-13 10:54:10,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:09" (2/3) ... [2022-07-13 10:54:10,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6f9e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:54:10, skipping insertion in model container [2022-07-13 10:54:10,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:54:10" (3/3) ... [2022-07-13 10:54:10,144 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2022-07-13 10:54:10,156 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:54:10,167 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:54:10,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:54:10,252 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d06a392, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b623641 [2022-07-13 10:54:10,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:54:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 10:54:10,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:10,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:10,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:10,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2022-07-13 10:54:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:10,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828229042] [2022-07-13 10:54:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:10,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828229042] [2022-07-13 10:54:10,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828229042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:54:10,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:54:10,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:54:10,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972548940] [2022-07-13 10:54:10,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:54:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:54:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:54:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:54:10,480 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:10,494 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-13 10:54:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:54:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-13 10:54:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:10,504 INFO L225 Difference]: With dead ends: 27 [2022-07-13 10:54:10,504 INFO L226 Difference]: Without dead ends: 12 [2022-07-13 10:54:10,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:54:10,517 INFO L413 NwaCegarLoop]: 18 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, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:10,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-13 10:54:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-13 10:54:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-13 10:54:10,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2022-07-13 10:54:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:10,548 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-13 10:54:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-13 10:54:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 10:54:10,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:10,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:10,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:54:10,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:10,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2022-07-13 10:54:10,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:10,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648671615] [2022-07-13 10:54:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:10,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648671615] [2022-07-13 10:54:10,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648671615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:54:10,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:54:10,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:54:10,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493915158] [2022-07-13 10:54:10,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:54:10,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:54:10,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:54:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:54:10,678 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:10,717 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-13 10:54:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:54:10,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-13 10:54:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:10,730 INFO L225 Difference]: With dead ends: 29 [2022-07-13 10:54:10,731 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 10:54:10,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:54:10,733 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:10,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 10:54:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2022-07-13 10:54:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-13 10:54:10,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-07-13 10:54:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:10,745 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-13 10:54:10,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-13 10:54:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 10:54:10,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:10,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:10,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 10:54:10,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2022-07-13 10:54:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:10,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220958322] [2022-07-13 10:54:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220958322] [2022-07-13 10:54:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220958322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:54:10,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:54:10,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:54:10,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946900198] [2022-07-13 10:54:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:54:10,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:54:10,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:54:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:54:10,838 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:10,870 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-13 10:54:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:54:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 10:54:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:10,872 INFO L225 Difference]: With dead ends: 23 [2022-07-13 10:54:10,873 INFO L226 Difference]: Without dead ends: 15 [2022-07-13 10:54:10,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:54:10,880 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:10,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-13 10:54:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-13 10:54:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-13 10:54:10,890 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-13 10:54:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:10,891 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-13 10:54:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-13 10:54:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 10:54:10,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:10,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:10,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 10:54:10,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2022-07-13 10:54:10,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:10,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271873360] [2022-07-13 10:54:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:10,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:10,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271873360] [2022-07-13 10:54:10,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271873360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606362535] [2022-07-13 10:54:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:10,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:10,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:10,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:54:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:54:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:11,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:11,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606362535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:11,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:11,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-07-13 10:54:11,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375691270] [2022-07-13 10:54:11,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:11,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:54:11,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:54:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:54:11,227 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:11,321 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-13 10:54:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:54:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 10:54:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:11,323 INFO L225 Difference]: With dead ends: 45 [2022-07-13 10:54:11,323 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 10:54:11,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-07-13 10:54:11,325 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:11,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 10:54:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-07-13 10:54:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2022-07-13 10:54:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-13 10:54:11,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-07-13 10:54:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:11,331 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-13 10:54:11,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-13 10:54:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 10:54:11,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:11,333 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:11,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:11,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:11,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2022-07-13 10:54:11,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:11,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770354647] [2022-07-13 10:54:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770354647] [2022-07-13 10:54:11,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770354647] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297323881] [2022-07-13 10:54:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:11,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:11,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:54:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 10:54:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:11,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:11,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297323881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:11,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:11,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-13 10:54:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952451060] [2022-07-13 10:54:11,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:11,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:54:11,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:54:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:54:11,815 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:11,896 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-13 10:54:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:54:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 14 [2022-07-13 10:54:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:11,898 INFO L225 Difference]: With dead ends: 39 [2022-07-13 10:54:11,898 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:54:11,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:54:11,900 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:11,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:54:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-13 10:54:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-07-13 10:54:11,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2022-07-13 10:54:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:11,916 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-07-13 10:54:11,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-07-13 10:54:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 10:54:11,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:11,918 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:11,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:12,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:12,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1859381769, now seen corresponding path program 2 times [2022-07-13 10:54:12,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:12,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552855296] [2022-07-13 10:54:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:12,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:12,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552855296] [2022-07-13 10:54:12,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552855296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:12,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130106238] [2022-07-13 10:54:12,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:54:12,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:12,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:12,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:54:12,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:54:12,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:54:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:12,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:12,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130106238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:12,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:12,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-07-13 10:54:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484585904] [2022-07-13 10:54:12,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:12,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 10:54:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 10:54:12,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2022-07-13 10:54:12,583 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:12,805 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-07-13 10:54:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 10:54:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 10:54:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:12,810 INFO L225 Difference]: With dead ends: 102 [2022-07-13 10:54:12,810 INFO L226 Difference]: Without dead ends: 95 [2022-07-13 10:54:12,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2022-07-13 10:54:12,814 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 320 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:12,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 77 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:54:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-13 10:54:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-07-13 10:54:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-13 10:54:12,834 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 22 [2022-07-13 10:54:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:12,835 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-13 10:54:12,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-13 10:54:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 10:54:12,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:12,836 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:12,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:13,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:13,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1855888886, now seen corresponding path program 2 times [2022-07-13 10:54:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:13,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323861947] [2022-07-13 10:54:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:13,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323861947] [2022-07-13 10:54:13,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323861947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038088290] [2022-07-13 10:54:13,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:54:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:13,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:13,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:54:13,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:54:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 10:54:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:13,501 INFO L390 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 15 treesize of output 11 [2022-07-13 10:54:13,605 INFO L390 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 21 treesize of output 9 [2022-07-13 10:54:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:13,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:13,697 INFO L390 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 14 [2022-07-13 10:54:13,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-13 10:54:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:14,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038088290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:14,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:14,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-07-13 10:54:14,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910580231] [2022-07-13 10:54:14,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:14,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:54:14,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:54:14,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:54:14,011 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:14,149 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-07-13 10:54:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:54:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 10:54:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:14,158 INFO L225 Difference]: With dead ends: 61 [2022-07-13 10:54:14,158 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 10:54:14,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:54:14,160 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:14,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 130 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-07-13 10:54:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 10:54:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-07-13 10:54:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-13 10:54:14,174 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 23 [2022-07-13 10:54:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:14,175 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-13 10:54:14,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-13 10:54:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 10:54:14,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:14,176 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:14,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:14,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:14,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash -954451792, now seen corresponding path program 3 times [2022-07-13 10:54:14,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612699341] [2022-07-13 10:54:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:14,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:14,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612699341] [2022-07-13 10:54:14,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612699341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471318894] [2022-07-13 10:54:14,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:54:14,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:14,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:14,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:14,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:54:14,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-13 10:54:14,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:14,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 10:54:14,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:14,780 INFO L390 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 15 treesize of output 11 [2022-07-13 10:54:14,859 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:54:14,859 INFO L390 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 29 treesize of output 28 [2022-07-13 10:54:14,914 INFO L390 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 21 treesize of output 9 [2022-07-13 10:54:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:14,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:47,100 INFO L390 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 23 treesize of output 21 [2022-07-13 10:54:47,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-07-13 10:54:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:47,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471318894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:47,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:47,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2022-07-13 10:54:47,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203114578] [2022-07-13 10:54:47,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:47,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 10:54:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 10:54:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=814, Unknown=15, NotChecked=0, Total=930 [2022-07-13 10:54:47,452 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:49,667 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-07-13 10:54:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:54:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 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 [2022-07-13 10:54:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:49,668 INFO L225 Difference]: With dead ends: 58 [2022-07-13 10:54:49,668 INFO L226 Difference]: Without dead ends: 56 [2022-07-13 10:54:49,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=120, Invalid=920, Unknown=16, NotChecked=0, Total=1056 [2022-07-13 10:54:49,669 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 306 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-07-13 10:54:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-13 10:54:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2022-07-13 10:54:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-13 10:54:49,675 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2022-07-13 10:54:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:49,675 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-13 10:54:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-13 10:54:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 10:54:49,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:49,678 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:49,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:49,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:49,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 1 times [2022-07-13 10:54:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:49,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692766157] [2022-07-13 10:54:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:49,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692766157] [2022-07-13 10:54:49,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692766157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:49,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810576287] [2022-07-13 10:54:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:49,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:49,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:49,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:49,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:54:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:50,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 10:54:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:50,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:50,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810576287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:50,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:50,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-07-13 10:54:50,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150488294] [2022-07-13 10:54:50,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:50,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:54:50,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:54:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:54:50,152 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:50,198 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-07-13 10:54:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:54:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-13 10:54:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:50,199 INFO L225 Difference]: With dead ends: 61 [2022-07-13 10:54:50,201 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 10:54:50,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:54:50,204 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:50,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 10:54:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-13 10:54:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-13 10:54:50,223 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 27 [2022-07-13 10:54:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:50,224 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-13 10:54:50,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:54:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-13 10:54:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 10:54:50,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:50,226 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:50,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:50,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2016089162, now seen corresponding path program 4 times [2022-07-13 10:54:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:50,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83892479] [2022-07-13 10:54:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:50,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83892479] [2022-07-13 10:54:50,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83892479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128773738] [2022-07-13 10:54:50,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:54:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:50,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:50,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:54:50,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:54:50,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:54:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:50,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:54:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:50,840 INFO L390 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 15 treesize of output 11 [2022-07-13 10:54:50,884 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:54:50,885 INFO L390 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 27 treesize of output 26 [2022-07-13 10:54:50,923 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:54:50,923 INFO L390 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 27 treesize of output 26 [2022-07-13 10:54:50,973 INFO L390 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 21 treesize of output 9 [2022-07-13 10:54:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:54:50,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:32,728 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_71| Int)) (or (forall ((v_ArrVal_169 Int) (v_ArrVal_168 Int) (|v_ULTIMATE.start_main_~i~0#1_70| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_71| 1) |v_ULTIMATE.start_main_~i~0#1_70|)) (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4)) v_ArrVal_168) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_70| 4)) v_ArrVal_169) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)) 0))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_71|)))) is different from false [2022-07-13 10:55:32,742 INFO L390 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 30 treesize of output 28 [2022-07-13 10:55:32,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 794 treesize of output 778 [2022-07-13 10:55:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-13 10:55:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128773738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:55:33,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:55:33,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2022-07-13 10:55:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774070656] [2022-07-13 10:55:33,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 10:55:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 10:55:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=911, Unknown=32, NotChecked=62, Total=1122 [2022-07-13 10:55:33,253 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:55:35,387 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_71| Int)) (or (forall ((v_ArrVal_169 Int) (v_ArrVal_168 Int) (|v_ULTIMATE.start_main_~i~0#1_70| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_71| 1) |v_ULTIMATE.start_main_~i~0#1_70|)) (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4)) v_ArrVal_168) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_70| 4)) v_ArrVal_169) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)) 0))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_71|)))) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 6) 0) (<= (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|)) 6) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 4 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2022-07-13 10:55:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:37,530 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-07-13 10:55:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 10:55:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 29 [2022-07-13 10:55:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:37,532 INFO L225 Difference]: With dead ends: 56 [2022-07-13 10:55:37,532 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 10:55:37,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=162, Invalid=1144, Unknown=34, NotChecked=142, Total=1482 [2022-07-13 10:55:37,533 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:55:37,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 92 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 353 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-07-13 10:55:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 10:55:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-07-13 10:55:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:55:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-13 10:55:37,539 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 29 [2022-07-13 10:55:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:37,539 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-13 10:55:37,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:55:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-13 10:55:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 10:55:37,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:37,541 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:55:37,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:37,760 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash 13772134, now seen corresponding path program 2 times [2022-07-13 10:55:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:37,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003975671] [2022-07-13 10:55:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:55:38,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003975671] [2022-07-13 10:55:38,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003975671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433001074] [2022-07-13 10:55:38,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:55:38,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:38,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:38,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:55:38,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:55:38,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:55:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:38,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:55:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:38,317 INFO L390 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 15 treesize of output 11 [2022-07-13 10:55:38,490 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:55:38,490 INFO L390 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 25 treesize of output 12 [2022-07-13 10:55:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:55:38,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:38,716 INFO L390 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 18 treesize of output 16 [2022-07-13 10:55:38,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-13 10:55:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:55:39,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433001074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:55:39,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:55:39,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-07-13 10:55:39,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400475596] [2022-07-13 10:55:39,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 10:55:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:39,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 10:55:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:55:39,178 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:55:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:39,357 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-07-13 10:55:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:55:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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 30 [2022-07-13 10:55:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:39,358 INFO L225 Difference]: With dead ends: 57 [2022-07-13 10:55:39,358 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 10:55:39,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=1677, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 10:55:39,359 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:55:39,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 72 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 288 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-13 10:55:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 10:55:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-13 10:55:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:55:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-13 10:55:39,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2022-07-13 10:55:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:39,363 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-13 10:55:39,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:55:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-13 10:55:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 10:55:39,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:39,364 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:55:39,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:39,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 10:55:39,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2142378644, now seen corresponding path program 3 times [2022-07-13 10:55:39,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839590140] [2022-07-13 10:55:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:55:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839590140] [2022-07-13 10:55:39,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839590140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523346826] [2022-07-13 10:55:39,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:55:39,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:39,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:39,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:55:39,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:55:39,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 10:55:39,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 10:55:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:40,041 INFO L390 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 15 treesize of output 11 [2022-07-13 10:55:40,110 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-13 10:55:40,110 INFO L390 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 32 treesize of output 31 [2022-07-13 10:55:40,181 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-07-13 10:55:40,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-13 10:55:40,387 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 10:55:40,388 INFO L390 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 36 treesize of output 12 [2022-07-13 10:55:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:55:40,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:56:23,037 INFO L390 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 63 treesize of output 59 [2022-07-13 10:56:23,047 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 10:56:23,048 INFO L390 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 2035 treesize of output 1995 [2022-07-13 10:56:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:23,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523346826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:56:23,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:56:23,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 44 [2022-07-13 10:56:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100714874] [2022-07-13 10:56:23,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 10:56:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 10:56:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1646, Unknown=28, NotChecked=0, Total=1892 [2022-07-13 10:56:23,839 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:56:24,479 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-07-13 10:56:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 10:56:24,479 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 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 33 [2022-07-13 10:56:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:56:24,480 INFO L225 Difference]: With dead ends: 57 [2022-07-13 10:56:24,480 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 10:56:24,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=392, Invalid=2550, Unknown=28, NotChecked=0, Total=2970 [2022-07-13 10:56:24,482 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:56:24,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 146 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 666 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-07-13 10:56:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 10:56:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-13 10:56:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-13 10:56:24,488 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 33 [2022-07-13 10:56:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:56:24,488 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-13 10:56:24,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-13 10:56:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 10:56:24,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:56:24,490 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 10:56:24,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:56:24,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:24,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:56:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:56:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1000805410, now seen corresponding path program 4 times [2022-07-13 10:56:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:56:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778468255] [2022-07-13 10:56:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:56:24,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:56:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:56:25,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778468255] [2022-07-13 10:56:25,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778468255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:25,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669130089] [2022-07-13 10:56:25,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:56:25,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:56:25,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:56:25,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:56:25,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:56:25,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:56:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 10:56:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:56:25,374 INFO L390 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 13 treesize of output 9 [2022-07-13 10:56:25,503 INFO L390 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 21 treesize of output 9 [2022-07-13 10:56:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:25,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:56:25,696 INFO L390 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 14 [2022-07-13 10:56:25,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-13 10:56:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:26,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669130089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:56:26,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:56:26,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2022-07-13 10:56:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393537620] [2022-07-13 10:56:26,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 10:56:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 10:56:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2551, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 10:56:26,219 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:56:26,882 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-07-13 10:56:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 10:56:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 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 37 [2022-07-13 10:56:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:56:26,883 INFO L225 Difference]: With dead ends: 71 [2022-07-13 10:56:26,883 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 10:56:26,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=3592, Unknown=0, NotChecked=0, Total=3906 [2022-07-13 10:56:26,885 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:56:26,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 316 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 834 Invalid, 0 Unknown, 312 Unchecked, 0.3s Time] [2022-07-13 10:56:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 10:56:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-13 10:56:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-07-13 10:56:26,890 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-07-13 10:56:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:56:26,891 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-07-13 10:56:26,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-07-13 10:56:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 10:56:26,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:56:26,892 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 10:56:26,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:56:27,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:56:27,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:56:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:56:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1128636068, now seen corresponding path program 5 times [2022-07-13 10:56:27,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:56:27,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648922141] [2022-07-13 10:56:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:56:27,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:56:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:27,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:56:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648922141] [2022-07-13 10:56:27,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648922141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336803306] [2022-07-13 10:56:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:56:27,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:27,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:56:27,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:56:27,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:56:27,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-13 10:56:27,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:56:27,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 10:56:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:56:27,588 INFO L390 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 15 treesize of output 11 [2022-07-13 10:56:27,638 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:56:27,638 INFO L390 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 29 treesize of output 28 [2022-07-13 10:56:27,762 INFO L390 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 21 treesize of output 9 [2022-07-13 10:56:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:27,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:56:29,931 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_127| Int)) (or (forall ((v_ArrVal_312 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_127| 4)) v_ArrVal_312) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_127|)))) is different from false [2022-07-13 10:56:29,939 INFO L390 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 23 treesize of output 21 [2022-07-13 10:56:29,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-07-13 10:56:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-07-13 10:56:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336803306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:56:30,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:56:30,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 45 [2022-07-13 10:56:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580867609] [2022-07-13 10:56:30,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 10:56:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 10:56:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1747, Unknown=1, NotChecked=84, Total=1980 [2022-07-13 10:56:30,385 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:32,585 WARN L833 $PredicateComparison]: unable to prove that (and (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_127| Int)) (or (forall ((v_ArrVal_312 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_127| 4)) v_ArrVal_312) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_127|)))) (<= (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|)) 15) 0) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 15) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 6)) is different from false [2022-07-13 10:56:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:56:32,777 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-07-13 10:56:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 10:56:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 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 40 [2022-07-13 10:56:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:56:32,782 INFO L225 Difference]: With dead ends: 74 [2022-07-13 10:56:32,782 INFO L226 Difference]: Without dead ends: 72 [2022-07-13 10:56:32,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=204, Invalid=2252, Unknown=2, NotChecked=194, Total=2652 [2022-07-13 10:56:32,783 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:56:32,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 289 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 654 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-13 10:56:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-13 10:56:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2022-07-13 10:56:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-07-13 10:56:32,789 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 40 [2022-07-13 10:56:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:56:32,790 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-07-13 10:56:32,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:56:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-07-13 10:56:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 10:56:32,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:56:32,791 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 10:56:32,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:56:32,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 10:56:33,000 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:56:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:56:33,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1642222050, now seen corresponding path program 6 times [2022-07-13 10:56:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:56:33,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205207890] [2022-07-13 10:56:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:56:33,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:56:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:56:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205207890] [2022-07-13 10:56:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205207890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075509008] [2022-07-13 10:56:33,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:56:33,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:33,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:56:33,324 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:56:33,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:56:33,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-13 10:56:33,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:56:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 10:56:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:56:33,529 INFO L390 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 15 treesize of output 11 [2022-07-13 10:56:33,582 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:56:33,583 INFO L390 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 27 treesize of output 26 [2022-07-13 10:56:33,649 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-07-13 10:56:33,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-13 10:56:33,702 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-07-13 10:56:33,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-13 10:56:33,940 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 10:56:33,941 INFO L390 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 36 treesize of output 12 [2022-07-13 10:56:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 3 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:56:33,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:14,476 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_146| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_146|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_145| Int) (v_ArrVal_359 Int) (v_ArrVal_358 Int)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_146| 4)) v_ArrVal_358) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_145| 4)) v_ArrVal_359))) (or (<= |v_ULTIMATE.start_main_~i~0#1_145| 5) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_146| 1) |v_ULTIMATE.start_main_~i~0#1_145|)) (< 0 (select .cse0 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))) (<= (select .cse0 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)) 0)))))) is different from false [2022-07-13 10:58:43,063 INFO L390 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 77 treesize of output 73 [2022-07-13 10:58:43,075 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 10:58:43,076 INFO L390 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 13427 treesize of output 13295