./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/insertion_sort-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/loops/insertion_sort-1.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 295b17c4ca5a4afcf4a0f36e9026f57ef5bd93d017747132380452b1ff4662bd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:56:35,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:56:35,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:56:35,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:56:35,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:56:35,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:56:35,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:56:35,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:56:35,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:56:35,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:56:35,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:56:35,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:56:35,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:56:35,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:56:35,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:56:35,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:56:35,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:56:35,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:56:35,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:56:35,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:56:35,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:56:35,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:56:35,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:56:35,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:56:35,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:56:35,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:56:35,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:56:35,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:56:35,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:56:35,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:56:35,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:56:35,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:56:35,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:56:35,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:56:35,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:56:35,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:56:35,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:56:35,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:56:35,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:56:35,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:56:35,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:56:35,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:56:35,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:56:35,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:56:35,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:56:35,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:56:35,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:56:35,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:56:35,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:56:35,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:56:35,826 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:56:35,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:56:35,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:56:35,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:56:35,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:56:35,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:56:35,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:56:35,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:56:35,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:56:35,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:56:35,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:56:35,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:56:35,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:56:35,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 295b17c4ca5a4afcf4a0f36e9026f57ef5bd93d017747132380452b1ff4662bd [2021-12-27 23:56:36,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:56:36,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:56:36,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:56:36,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:56:36,144 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:56:36,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-1.c [2021-12-27 23:56:36,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77ebd6f21/902dba966e4342b59610efe10e2b49ac/FLAG567779598 [2021-12-27 23:56:36,514 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:56:36,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c [2021-12-27 23:56:36,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77ebd6f21/902dba966e4342b59610efe10e2b49ac/FLAG567779598 [2021-12-27 23:56:36,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77ebd6f21/902dba966e4342b59610efe10e2b49ac [2021-12-27 23:56:36,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:56:36,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:56:36,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:56:36,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:56:36,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:56:36,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:56:36" (1/1) ... [2021-12-27 23:56:36,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f713d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:36, skipping insertion in model container [2021-12-27 23:56:36,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:56:36" (1/1) ... [2021-12-27 23:56:36,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:56:36,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:56:37,070 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/loops/insertion_sort-1.c[328,341] [2021-12-27 23:56:37,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:56:37,086 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:56:37,124 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/loops/insertion_sort-1.c[328,341] [2021-12-27 23:56:37,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:56:37,155 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:56:37,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37 WrapperNode [2021-12-27 23:56:37,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:56:37,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:56:37,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:56:37,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:56:37,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,187 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-27 23:56:37,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:56:37,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:56:37,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:56:37,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:56:37,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:56:37,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:56:37,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:56:37,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:56:37,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (1/1) ... [2021-12-27 23:56:37,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:56:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:56:37,243 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) [2021-12-27 23:56:37,261 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 [2021-12-27 23:56:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:56:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:56:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 23:56:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 23:56:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:56:37,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:56:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 23:56:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 23:56:37,336 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:56:37,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:56:37,480 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:56:37,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:56:37,484 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-27 23:56:37,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:56:37 BoogieIcfgContainer [2021-12-27 23:56:37,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:56:37,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:56:37,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:56:37,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:56:37,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:56:36" (1/3) ... [2021-12-27 23:56:37,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d494d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:56:37, skipping insertion in model container [2021-12-27 23:56:37,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:56:37" (2/3) ... [2021-12-27 23:56:37,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d494d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:56:37, skipping insertion in model container [2021-12-27 23:56:37,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:56:37" (3/3) ... [2021-12-27 23:56:37,491 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-12-27 23:56:37,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:56:37,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:56:37,556 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:56:37,561 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:56:37,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:56:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-27 23:56:37,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:37,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:37,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2021-12-27 23:56:37,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:37,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990172607] [2021-12-27 23:56:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:37,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:56:37,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990172607] [2021-12-27 23:56:37,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990172607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:56:37,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:56:37,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 23:56:37,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225729879] [2021-12-27 23:56:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:56:37,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 23:56:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 23:56:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:56:37,881 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:56:37,940 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-12-27 23:56:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 23:56:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-12-27 23:56:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:56:37,947 INFO L225 Difference]: With dead ends: 54 [2021-12-27 23:56:37,948 INFO L226 Difference]: Without dead ends: 22 [2021-12-27 23:56:37,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-27 23:56:37,953 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:56:37,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:56:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-27 23:56:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-27 23:56:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-12-27 23:56:37,984 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2021-12-27 23:56:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:56:37,984 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-12-27 23:56:37,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-12-27 23:56:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 23:56:37,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:37,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:37,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:56:37,987 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2021-12-27 23:56:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297109485] [2021-12-27 23:56:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:37,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:56:38,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297109485] [2021-12-27 23:56:38,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297109485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:56:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196495666] [2021-12-27 23:56:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:38,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:56:38,119 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) [2021-12-27 23:56:38,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:56:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 23:56:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:56:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:56:38,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:56:38,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196495666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:56:38,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 23:56:38,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-12-27 23:56:38,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414457247] [2021-12-27 23:56:38,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:56:38,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 23:56:38,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 23:56:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 23:56:38,317 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:56:38,383 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-27 23:56:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 23:56:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-12-27 23:56:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:56:38,384 INFO L225 Difference]: With dead ends: 37 [2021-12-27 23:56:38,387 INFO L226 Difference]: Without dead ends: 29 [2021-12-27 23:56:38,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-27 23:56:38,389 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:56:38,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:56:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-27 23:56:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2021-12-27 23:56:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-12-27 23:56:38,393 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-12-27 23:56:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:56:38,393 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-12-27 23:56:38,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-12-27 23:56:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-27 23:56:38,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:38,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:38,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:56:38,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:38,611 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash 188510022, now seen corresponding path program 1 times [2021-12-27 23:56:38,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555464064] [2021-12-27 23:56:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:38,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:56:38,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555464064] [2021-12-27 23:56:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555464064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:56:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203694623] [2021-12-27 23:56:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:38,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:56:38,716 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) [2021-12-27 23:56:38,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 23:56:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 23:56:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:56:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:56:38,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:56:41,221 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int)) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|) (<= (+ |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|)) 0) (< (mod |c_ULTIMATE.start_main_~j~0#1| 4294967296) (mod (+ (* |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295) 1) 4294967296)) (<= 0 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|))) is different from false [2021-12-27 23:56:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-27 23:56:44,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203694623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:56:44,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:56:44,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-27 23:56:44,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317202030] [2021-12-27 23:56:45,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:56:45,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 23:56:45,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 23:56:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=39, Unknown=2, NotChecked=12, Total=72 [2021-12-27 23:56:45,017 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:56:45,064 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-12-27 23:56:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 23:56:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-27 23:56:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:56:45,065 INFO L225 Difference]: With dead ends: 49 [2021-12-27 23:56:45,065 INFO L226 Difference]: Without dead ends: 32 [2021-12-27 23:56:45,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19, Invalid=39, Unknown=2, NotChecked=12, Total=72 [2021-12-27 23:56:45,066 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:56:45,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-12-27 23:56:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-27 23:56:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-12-27 23:56:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-27 23:56:45,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-12-27 23:56:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:56:45,070 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-27 23:56:45,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-27 23:56:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 23:56:45,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:45,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:45,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 23:56:45,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-27 23:56:45,285 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 2 times [2021-12-27 23:56:45,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:45,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372566567] [2021-12-27 23:56:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:45,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:56:45,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372566567] [2021-12-27 23:56:45,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372566567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:56:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906279258] [2021-12-27 23:56:45,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:56:45,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:56:45,672 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) [2021-12-27 23:56:45,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 23:56:45,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:56:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:56:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-27 23:56:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:56:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:56:45,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-27 23:56:45,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:56:45,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-27 23:56:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:56:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:56:46,114 INFO L387 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 41 treesize of output 35 [2021-12-27 23:56:46,131 INFO L353 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-12-27 23:56:46,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2021-12-27 23:56:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:56:46,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906279258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:56:46,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:56:46,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 26 [2021-12-27 23:56:46,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064299178] [2021-12-27 23:56:46,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:56:46,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-27 23:56:46,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:46,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-27 23:56:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-12-27 23:56:46,212 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:56:46,682 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2021-12-27 23:56:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-27 23:56:46,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-27 23:56:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:56:46,683 INFO L225 Difference]: With dead ends: 93 [2021-12-27 23:56:46,683 INFO L226 Difference]: Without dead ends: 78 [2021-12-27 23:56:46,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2021-12-27 23:56:46,685 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:56:46,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 146 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 295 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-27 23:56:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-27 23:56:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2021-12-27 23:56:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-27 23:56:46,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2021-12-27 23:56:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:56:46,691 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-27 23:56:46,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-27 23:56:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 23:56:46,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:46,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:46,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 23:56:46,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:46,909 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash -699507578, now seen corresponding path program 1 times [2021-12-27 23:56:46,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:46,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629674161] [2021-12-27 23:56:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:46,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:56:46,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629674161] [2021-12-27 23:56:46,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629674161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:56:46,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:56:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 23:56:46,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236855710] [2021-12-27 23:56:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:56:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 23:56:46,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 23:56:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:56:46,955 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:56:46,992 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-12-27 23:56:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 23:56:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-27 23:56:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:56:46,992 INFO L225 Difference]: With dead ends: 80 [2021-12-27 23:56:46,992 INFO L226 Difference]: Without dead ends: 53 [2021-12-27 23:56:46,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-27 23:56:46,993 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:56:46,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:56:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-27 23:56:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-12-27 23:56:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-12-27 23:56:46,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2021-12-27 23:56:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:56:46,998 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-12-27 23:56:46,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-12-27 23:56:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 23:56:46,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:46,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:46,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 23:56:46,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2021-12-27 23:56:46,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:46,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399187395] [2021-12-27 23:56:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:46,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:56:47,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399187395] [2021-12-27 23:56:47,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399187395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:56:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234690883] [2021-12-27 23:56:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:47,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:56:47,103 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) [2021-12-27 23:56:47,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 23:56:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:47,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 23:56:47,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:56:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:56:47,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:56:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:56:47,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234690883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:56:47,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:56:47,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-27 23:56:47,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843884649] [2021-12-27 23:56:47,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:56:47,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 23:56:47,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 23:56:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-27 23:56:47,397 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:56:47,546 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2021-12-27 23:56:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 23:56:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 [2021-12-27 23:56:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:56:47,548 INFO L225 Difference]: With dead ends: 122 [2021-12-27 23:56:47,548 INFO L226 Difference]: Without dead ends: 86 [2021-12-27 23:56:47,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-27 23:56:47,549 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 150 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:56:47,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 190 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:56:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-27 23:56:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-12-27 23:56:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-12-27 23:56:47,563 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 23 [2021-12-27 23:56:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:56:47,563 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-12-27 23:56:47,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:56:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-12-27 23:56:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 23:56:47,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:56:47,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:56:47,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 23:56:47,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:47,779 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:56:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:56:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2021-12-27 23:56:47,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:56:47,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828110675] [2021-12-27 23:56:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:47,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:56:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:56:48,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:56:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828110675] [2021-12-27 23:56:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828110675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:56:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603260283] [2021-12-27 23:56:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:56:48,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:56:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:56:48,153 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) [2021-12-27 23:56:48,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 23:56:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:56:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-27 23:56:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:56:48,333 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-27 23:56:48,333 INFO L387 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 39 treesize of output 30 [2021-12-27 23:56:48,535 INFO L353 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-12-27 23:56:48,535 INFO L387 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 48 treesize of output 31 [2021-12-27 23:56:48,717 INFO L353 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-12-27 23:56:48,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-12-27 23:56:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:56:48,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:56:49,182 INFO L387 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 69 treesize of output 61 [2021-12-27 23:56:49,189 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-27 23:56:49,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 347 [2021-12-27 23:56:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:56:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603260283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:56:50,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:56:50,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2021-12-27 23:56:50,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163113179] [2021-12-27 23:56:50,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:56:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-27 23:56:51,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:56:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-27 23:56:51,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1206, Unknown=2, NotChecked=0, Total=1406 [2021-12-27 23:56:51,003 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:01,636 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2021-12-27 23:57:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-27 23:57:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 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 24 [2021-12-27 23:57:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:01,638 INFO L225 Difference]: With dead ends: 148 [2021-12-27 23:57:01,638 INFO L226 Difference]: Without dead ends: 134 [2021-12-27 23:57:01,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=408, Invalid=2670, Unknown=2, NotChecked=0, Total=3080 [2021-12-27 23:57:01,640 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:01,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 251 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2021-12-27 23:57:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-27 23:57:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2021-12-27 23:57:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 85 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-12-27 23:57:01,668 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 24 [2021-12-27 23:57:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:01,668 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-12-27 23:57:01,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-12-27 23:57:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-27 23:57:01,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:01,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:01,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 23:57:01,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:01,888 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 3 times [2021-12-27 23:57:01,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732571095] [2021-12-27 23:57:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:01,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:02,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732571095] [2021-12-27 23:57:02,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732571095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938326291] [2021-12-27 23:57:02,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 23:57:02,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:02,301 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) [2021-12-27 23:57:02,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 23:57:02,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-27 23:57:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:57:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-27 23:57:02,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:57:02,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-12-27 23:57:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:57:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:57:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:57:02,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:57:02,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-27 23:57:02,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:57:02,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-27 23:57:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:02,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:26,299 INFO L387 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 57 treesize of output 51 [2021-12-27 23:57:26,322 INFO L353 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-27 23:57:26,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 373 treesize of output 363 [2021-12-27 23:57:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:27,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938326291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:27,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:27,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-27 23:57:27,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199828104] [2021-12-27 23:57:27,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:27,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-27 23:57:27,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-27 23:57:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=868, Unknown=18, NotChecked=0, Total=1056 [2021-12-27 23:57:27,736 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:28,852 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_115 Int) (|v_ULTIMATE.start_main_~i~0#1_18| Int) (v_ArrVal_113 Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_18|)) (not (<= |c_ULTIMATE.start_main_~key~0#1| v_ArrVal_113)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_113) (+ (* |v_ULTIMATE.start_main_~i~0#1_18| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_115))) (<= (select .cse0 |c_ULTIMATE.start_main_~#v~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_18| |c_ULTIMATE.start_main_~j~0#1|))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|))) (<= (select .cse1 0) (select .cse1 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)))) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (<= 2 |c_ULTIMATE.start_main_~j~0#1|) |c_ULTIMATE.start_main_#t~short10#1| (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0)) is different from false [2021-12-27 23:57:30,105 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (and (= (* |c_ULTIMATE.start_main_~i~0#1| 4) 0) (< 0 |c_ULTIMATE.start_main_~j~0#1|)))) (and (or (forall ((v_ArrVal_115 Int) (|v_ULTIMATE.start_main_~i~0#1_18| Int) (v_ArrVal_113 Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_18|)) (not (<= |c_ULTIMATE.start_main_~key~0#1| v_ArrVal_113)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_113) (+ (* |v_ULTIMATE.start_main_~i~0#1_18| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_115))) (<= (select .cse0 |c_ULTIMATE.start_main_~#v~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_18| |c_ULTIMATE.start_main_~j~0#1|))) |c_ULTIMATE.start_main_#t~short10#1|) (not (= (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4)) 0)) (or (not (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) .cse1) (or (not |c_ULTIMATE.start_main_#t~short10#1|) .cse1) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0))) is different from false [2021-12-27 23:57:30,917 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (and (= (* |c_ULTIMATE.start_main_~i~0#1| 4) 0) (< 0 |c_ULTIMATE.start_main_~j~0#1|)))) (and (or (forall ((v_ArrVal_115 Int) (|v_ULTIMATE.start_main_~i~0#1_18| Int) (v_ArrVal_113 Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_18|)) (not (<= |c_ULTIMATE.start_main_~key~0#1| v_ArrVal_113)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_113) (+ (* |v_ULTIMATE.start_main_~i~0#1_18| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_115))) (<= (select .cse0 |c_ULTIMATE.start_main_~#v~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_18| |c_ULTIMATE.start_main_~j~0#1|))) |c_ULTIMATE.start_main_#t~short10#1|) (or (not (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) .cse1) (or (not |c_ULTIMATE.start_main_#t~short10#1|) .cse1))) is different from false [2021-12-27 23:57:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:37,598 INFO L93 Difference]: Finished difference Result 242 states and 307 transitions. [2021-12-27 23:57:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-27 23:57:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-27 23:57:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:37,600 INFO L225 Difference]: With dead ends: 242 [2021-12-27 23:57:37,600 INFO L226 Difference]: Without dead ends: 240 [2021-12-27 23:57:37,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=562, Invalid=3206, Unknown=26, NotChecked=366, Total=4160 [2021-12-27 23:57:37,602 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 200 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:37,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 386 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 537 Invalid, 0 Unknown, 409 Unchecked, 0.4s Time] [2021-12-27 23:57:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-27 23:57:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 103. [2021-12-27 23:57:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 102 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2021-12-27 23:57:37,650 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 27 [2021-12-27 23:57:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:37,652 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2021-12-27 23:57:37,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2021-12-27 23:57:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-27 23:57:37,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:37,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:37,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-27 23:57:37,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:37,855 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash -767414921, now seen corresponding path program 1 times [2021-12-27 23:57:37,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:37,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67967001] [2021-12-27 23:57:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:37,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:37,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:37,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67967001] [2021-12-27 23:57:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67967001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:37,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018730851] [2021-12-27 23:57:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:37,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:37,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:37,927 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) [2021-12-27 23:57:37,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 23:57:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-27 23:57:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:38,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018730851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:38,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:38,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-27 23:57:38,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341013390] [2021-12-27 23:57:38,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:38,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 23:57:38,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 23:57:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-27 23:57:38,126 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:38,306 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2021-12-27 23:57:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 23:57:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-27 23:57:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:38,308 INFO L225 Difference]: With dead ends: 190 [2021-12-27 23:57:38,308 INFO L226 Difference]: Without dead ends: 143 [2021-12-27 23:57:38,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-12-27 23:57:38,310 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 116 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:38,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:57:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-27 23:57:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2021-12-27 23:57:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2727272727272727) internal successors, (126), 99 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-27 23:57:38,335 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 27 [2021-12-27 23:57:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:38,336 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-27 23:57:38,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-27 23:57:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-27 23:57:38,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:38,339 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:38,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-27 23:57:38,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:38,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2024572452, now seen corresponding path program 2 times [2021-12-27 23:57:38,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:38,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95934570] [2021-12-27 23:57:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:38,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 23:57:38,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95934570] [2021-12-27 23:57:38,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95934570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:57:38,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:57:38,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:57:38,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029885851] [2021-12-27 23:57:38,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:57:38,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:57:38,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:57:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:57:38,612 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:38,623 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2021-12-27 23:57:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:57:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-27 23:57:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:38,625 INFO L225 Difference]: With dead ends: 150 [2021-12-27 23:57:38,625 INFO L226 Difference]: Without dead ends: 57 [2021-12-27 23:57:38,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:57:38,626 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:38,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:57:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-27 23:57:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-27 23:57:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-27 23:57:38,634 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 29 [2021-12-27 23:57:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:38,634 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-27 23:57:38,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-27 23:57:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 23:57:38,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:38,635 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:38,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 23:57:38,635 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2021-12-27 23:57:38,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:38,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600272045] [2021-12-27 23:57:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:38,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:38,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:38,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600272045] [2021-12-27 23:57:38,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600272045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:38,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839540947] [2021-12-27 23:57:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:57:38,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:38,816 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) [2021-12-27 23:57:38,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 23:57:38,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:57:38,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:57:38,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 23:57:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:39,003 INFO L387 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 16 treesize of output 12 [2021-12-27 23:57:39,074 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 23:57:39,074 INFO L387 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 23 treesize of output 22 [2021-12-27 23:57:39,148 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-27 23:57:39,148 INFO L387 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 34 treesize of output 10 [2021-12-27 23:57:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:39,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:40,190 INFO L387 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 67 treesize of output 61 [2021-12-27 23:57:40,216 INFO L353 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-12-27 23:57:40,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 857 treesize of output 802 [2021-12-27 23:57:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:43,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839540947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:43,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:43,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 27 [2021-12-27 23:57:43,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508866082] [2021-12-27 23:57:43,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:43,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-27 23:57:43,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:43,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-27 23:57:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=608, Unknown=1, NotChecked=0, Total=702 [2021-12-27 23:57:43,776 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:44,345 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2021-12-27 23:57:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-27 23:57:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 31 [2021-12-27 23:57:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:44,346 INFO L225 Difference]: With dead ends: 101 [2021-12-27 23:57:44,346 INFO L226 Difference]: Without dead ends: 99 [2021-12-27 23:57:44,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=1034, Unknown=1, NotChecked=0, Total=1190 [2021-12-27 23:57:44,348 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:44,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 241 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 361 Invalid, 0 Unknown, 117 Unchecked, 0.4s Time] [2021-12-27 23:57:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-27 23:57:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2021-12-27 23:57:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2021-12-27 23:57:44,363 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 31 [2021-12-27 23:57:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:44,364 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2021-12-27 23:57:44,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2021-12-27 23:57:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-27 23:57:44,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:44,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:44,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 23:57:44,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 23:57:44,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2021-12-27 23:57:44,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:44,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488651192] [2021-12-27 23:57:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:44,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:57:45,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488651192] [2021-12-27 23:57:45,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488651192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222100912] [2021-12-27 23:57:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:45,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:45,014 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) [2021-12-27 23:57:45,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 23:57:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:45,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-27 23:57:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:45,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:57:45,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-27 23:57:45,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:57:45,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-27 23:57:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:45,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:45,638 INFO L387 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 41 treesize of output 35 [2021-12-27 23:57:45,655 INFO L353 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-12-27 23:57:45,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2021-12-27 23:57:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:45,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222100912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:45,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:45,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 29 [2021-12-27 23:57:45,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210982738] [2021-12-27 23:57:45,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:45,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-27 23:57:45,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-27 23:57:45,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-12-27 23:57:45,793 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:46,766 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2021-12-27 23:57:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-27 23:57:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-27 23:57:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:46,767 INFO L225 Difference]: With dead ends: 168 [2021-12-27 23:57:46,767 INFO L226 Difference]: Without dead ends: 139 [2021-12-27 23:57:46,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=636, Invalid=2334, Unknown=0, NotChecked=0, Total=2970 [2021-12-27 23:57:46,768 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 195 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:46,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 278 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 467 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2021-12-27 23:57:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-27 23:57:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 80. [2021-12-27 23:57:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-12-27 23:57:46,777 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 32 [2021-12-27 23:57:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:46,777 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-12-27 23:57:46,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-12-27 23:57:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-27 23:57:46,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:46,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:46,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-27 23:57:46,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:46,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 3 times [2021-12-27 23:57:46,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:46,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54796924] [2021-12-27 23:57:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:46,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:47,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54796924] [2021-12-27 23:57:47,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54796924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584407870] [2021-12-27 23:57:47,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 23:57:47,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:47,511 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) [2021-12-27 23:57:47,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 23:57:47,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-27 23:57:47,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:57:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-27 23:57:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:47,701 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-27 23:57:47,701 INFO L387 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 39 treesize of output 30 [2021-12-27 23:57:47,897 INFO L353 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-12-27 23:57:47,898 INFO L387 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 49 treesize of output 30 [2021-12-27 23:57:48,065 INFO L353 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-12-27 23:57:48,066 INFO L387 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 35 treesize of output 37 [2021-12-27 23:57:48,183 INFO L353 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-12-27 23:57:48,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2021-12-27 23:57:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:57:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates...